/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:21:46,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:21:46,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:21:46,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:21:46,442 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 [2021-06-12 22:21:46,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:21:46,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:21:46,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:21:46,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:21:46,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:21:46,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:21:46,483 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:21:46,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:21:46,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:21:46,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:21:46,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:21:46,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:21:46,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:21:46,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:21:46,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:21:46,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:21:46,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:21:46,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:21:46,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:21:46,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:21:46,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:21:46,497 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:21:46,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:21:46,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:21:46,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:21:46,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:21:46,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:21:46,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:21:46,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:21:46,498 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:21:46,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:21:46,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:21:46,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:21:46,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:21:46,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:21:46,857 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:21:46,858 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:21:46,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl [2021-06-12 22:21:46,859 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array-hom.wvr.bpl' [2021-06-12 22:21:46,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:21:46,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:21:46,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:21:46,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:21:46,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:21:46,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:21:46,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:21:46,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:21:46,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:21:46,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/1) ... [2021-06-12 22:21:46,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:21:46,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:21:46,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:21:46,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:21:46,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (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 [2021-06-12 22:21:46,998 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:21:46,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:21:46,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:21:46,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:21:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:21:46,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:21:46,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:21:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:21:46,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:21:46,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:21:47,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:21:47,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:21:47,001 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:21:47,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:21:47,189 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:21:47,191 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:21:47 BoogieIcfgContainer [2021-06-12 22:21:47,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:21:47,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:21:47,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:21:47,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:21:47,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:21:46" (1/2) ... [2021-06-12 22:21:47,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57c7da3b and model type sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:21:47, skipping insertion in model container [2021-06-12 22:21:47,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:21:47" (2/2) ... [2021-06-12 22:21:47,209 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array-hom.wvr.bpl [2021-06-12 22:21:47,214 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:21:47,214 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:21:47,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:21:47,215 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:21:47,263 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 22:21:47,277 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 22:21:47,294 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:21:47,294 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:21:47,294 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:21:47,294 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:21:47,295 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:21:47,295 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:21:47,295 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:21:47,295 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:21:47,303 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-12 22:21:47,325 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 22:21:47,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:47,336 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:47,336 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-06-12 22:21:47,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:47,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703174988] [2021-06-12 22:21:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:47,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:47,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703174988] [2021-06-12 22:21:47,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703174988] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:21:47,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:21:47,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:21:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142439965] [2021-06-12 22:21:47,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:21:47,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:21:47,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:21:47,515 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-06-12 22:21:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:47,572 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-12 22:21:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:21:47,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2021-06-12 22:21:47,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:47,583 INFO L225 Difference]: With dead ends: 154 [2021-06-12 22:21:47,583 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 22:21:47,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:21:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 22:21:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-12 22:21:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-12 22:21:47,623 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-12 22:21:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:47,624 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-12 22:21:47,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-06-12 22:21:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-12 22:21:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 22:21:47,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:47,626 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:47,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:21:47,626 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-06-12 22:21:47,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:47,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357737704] [2021-06-12 22:21:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:47,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357737704] [2021-06-12 22:21:47,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357737704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:21:47,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:21:47,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:21:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370099836] [2021-06-12 22:21:47,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:21:47,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:47,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:21:47,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:21:47,689 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:47,743 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-12 22:21:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:21:47,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 22:21:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:47,747 INFO L225 Difference]: With dead ends: 158 [2021-06-12 22:21:47,748 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 22:21:47,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:21:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 22:21:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-12 22:21:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-12 22:21:47,770 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-12 22:21:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:47,770 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-12 22:21:47,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-12 22:21:47,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:21:47,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:47,772 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:47,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:21:47,772 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-06-12 22:21:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:47,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627498973] [2021-06-12 22:21:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:48,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:48,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627498973] [2021-06-12 22:21:48,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627498973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:48,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70917424] [2021-06-12 22:21:48,121 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 [2021-06-12 22:21:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:21:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:48,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:21:48,493 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 11 treesize of output 7 [2021-06-12 22:21:48,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:48,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:48,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:48,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-06-12 22:21:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:48,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70917424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:48,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:48,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:21:48,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785040892] [2021-06-12 22:21:48,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:21:48,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:48,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:21:48,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:21:48,558 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) 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) [2021-06-12 22:21:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:48,786 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-12 22:21:48,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:21:48,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 22 [2021-06-12 22:21:48,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:48,788 INFO L225 Difference]: With dead ends: 330 [2021-06-12 22:21:48,788 INFO L226 Difference]: Without dead ends: 315 [2021-06-12 22:21:48,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:21:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-12 22:21:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-12 22:21:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-12 22:21:48,801 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-12 22:21:48,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:48,802 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-12 22:21:48,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) 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) [2021-06-12 22:21:48,802 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-12 22:21:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:21:48,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:48,804 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:49,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 22:21:49,028 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:49,029 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-06-12 22:21:49,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:49,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901123979] [2021-06-12 22:21:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:49,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:49,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901123979] [2021-06-12 22:21:49,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901123979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:49,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318660745] [2021-06-12 22:21:49,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:21:49,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:49,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:21:49,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:49,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:49,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 22:21:49,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:21:49,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:49,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:49,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-12 22:21:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:49,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318660745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:49,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:49,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-12 22:21:49,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042258427] [2021-06-12 22:21:49,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:21:49,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:49,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:21:49,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:49,610 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-06-12 22:21:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:50,034 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-12 22:21:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:21:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-06-12 22:21:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:50,039 INFO L225 Difference]: With dead ends: 374 [2021-06-12 22:21:50,039 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 22:21:50,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 22:21:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-12 22:21:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-12 22:21:50,056 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-12 22:21:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:50,056 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-12 22:21:50,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-06-12 22:21:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-12 22:21:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:21:50,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:50,062 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:50,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:50,285 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-06-12 22:21:50,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:50,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087539226] [2021-06-12 22:21:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:50,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:50,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087539226] [2021-06-12 22:21:50,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087539226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:50,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869382777] [2021-06-12 22:21:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:50,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:21:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:50,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:21:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:50,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:21:50,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:50,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:50,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:50,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-06-12 22:21:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:50,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869382777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:50,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:50,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:21:50,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980844094] [2021-06-12 22:21:50,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:21:50,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:50,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:21:50,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:21:50,687 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:50,843 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-12 22:21:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:21:50,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:21:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:50,849 INFO L225 Difference]: With dead ends: 296 [2021-06-12 22:21:50,849 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 22:21:50,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:21:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 22:21:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-12 22:21:50,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-12 22:21:50,860 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-12 22:21:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:50,860 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-12 22:21:50,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-12 22:21:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:21:50,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:50,863 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:51,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:51,081 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-06-12 22:21:51,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:51,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304661845] [2021-06-12 22:21:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:51,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304661845] [2021-06-12 22:21:51,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304661845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:51,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29184618] [2021-06-12 22:21:51,283 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 [2021-06-12 22:21:51,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:51,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:51,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:21:51,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:51,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:51,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-12 22:21:51,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:21:51,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:51,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:51,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-06-12 22:21:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:51,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29184618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:51,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:51,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:21:51,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271197053] [2021-06-12 22:21:51,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:21:51,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:21:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:21:51,530 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:51,760 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-12 22:21:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:21:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:21:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:51,763 INFO L225 Difference]: With dead ends: 425 [2021-06-12 22:21:51,763 INFO L226 Difference]: Without dead ends: 410 [2021-06-12 22:21:51,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:21:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-12 22:21:51,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-12 22:21:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-12 22:21:51,771 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-12 22:21:51,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:51,771 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-12 22:21:51,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-12 22:21:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:51,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:51,772 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:51,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:51,973 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-06-12 22:21:51,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:51,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097059440] [2021-06-12 22:21:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:52,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:52,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097059440] [2021-06-12 22:21:52,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097059440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:52,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987902256] [2021-06-12 22:21:52,018 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 [2021-06-12 22:21:52,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:21:52,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:52,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987902256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:52,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:52,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:21:52,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265802427] [2021-06-12 22:21:52,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:21:52,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:21:52,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:21:52,154 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:52,608 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-12 22:21:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:21:52,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:52,612 INFO L225 Difference]: With dead ends: 619 [2021-06-12 22:21:52,612 INFO L226 Difference]: Without dead ends: 619 [2021-06-12 22:21:52,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 260.9ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:21:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-12 22:21:52,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-12 22:21:52,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-12 22:21:52,624 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-12 22:21:52,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:52,625 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-12 22:21:52,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:52,625 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-12 22:21:52,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:52,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:52,626 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:52,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 22:21:52,845 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-06-12 22:21:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:52,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542311716] [2021-06-12 22:21:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:52,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:52,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542311716] [2021-06-12 22:21:52,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542311716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:52,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490556124] [2021-06-12 22:21:52,887 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 [2021-06-12 22:21:52,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:21:52,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:52,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:53,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490556124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:53,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:53,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:21:53,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441397890] [2021-06-12 22:21:53,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:21:53,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:53,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:21:53,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:53,032 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:53,837 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-12 22:21:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:21:53,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:53,843 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 22:21:53,843 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 22:21:53,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:21:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 22:21:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-12 22:21:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-12 22:21:53,859 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-12 22:21:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:53,859 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-12 22:21:53,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-12 22:21:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:53,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:53,861 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:54,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:54,077 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-06-12 22:21:54,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:54,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40973427] [2021-06-12 22:21:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:54,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:54,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40973427] [2021-06-12 22:21:54,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40973427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:54,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244714061] [2021-06-12 22:21:54,123 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 [2021-06-12 22:21:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:54,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:54,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244714061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:54,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:54,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:21:54,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830716454] [2021-06-12 22:21:54,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:21:54,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:54,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:21:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:54,256 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:55,017 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-12 22:21:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:21:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:55,022 INFO L225 Difference]: With dead ends: 951 [2021-06-12 22:21:55,022 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 22:21:55,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:21:55,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 22:21:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-12 22:21:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-12 22:21:55,035 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-12 22:21:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:55,035 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-12 22:21:55,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,035 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-12 22:21:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:55,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:55,036 INFO L472 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] [2021-06-12 22:21:55,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:55,259 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:55,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:55,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-06-12 22:21:55,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:55,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011423546] [2021-06-12 22:21:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:55,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:55,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011423546] [2021-06-12 22:21:55,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011423546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:55,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675110095] [2021-06-12 22:21:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:55,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:21:55,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:55,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675110095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:55,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:55,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:21:55,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247056130] [2021-06-12 22:21:55,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:21:55,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:55,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:21:55,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:21:55,373 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:55,488 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-12 22:21:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:21:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:55,492 INFO L225 Difference]: With dead ends: 669 [2021-06-12 22:21:55,492 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 22:21:55,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 22:21:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-12 22:21:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-12 22:21:55,505 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-12 22:21:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:55,505 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-12 22:21:55,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-12 22:21:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:55,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:55,507 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:55,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 22:21:55,728 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:55,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:55,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-06-12 22:21:55,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:55,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583866079] [2021-06-12 22:21:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:55,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:55,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583866079] [2021-06-12 22:21:55,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583866079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:55,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104634794] [2021-06-12 22:21:55,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:55,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:55,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:55,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104634794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:55,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:55,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:21:55,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755788162] [2021-06-12 22:21:55,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:21:55,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:21:55,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:55,943 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:56,136 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-12 22:21:56,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:21:56,136 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:56,140 INFO L225 Difference]: With dead ends: 710 [2021-06-12 22:21:56,140 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 22:21:56,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:21:56,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 22:21:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-12 22:21:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:56,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-12 22:21:56,154 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-12 22:21:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:56,154 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-12 22:21:56,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-12 22:21:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:56,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:56,156 INFO L472 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] [2021-06-12 22:21:56,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 22:21:56,378 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:56,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:56,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-06-12 22:21:56,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:56,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888707725] [2021-06-12 22:21:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:56,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:56,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888707725] [2021-06-12 22:21:56,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888707725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:56,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550203906] [2021-06-12 22:21:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:56,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:56,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:21:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:56,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550203906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:56,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:56,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:21:56,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370044611] [2021-06-12 22:21:56,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:21:56,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:56,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:21:56,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:21:56,505 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:56,614 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-12 22:21:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:21:56,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:56,619 INFO L225 Difference]: With dead ends: 830 [2021-06-12 22:21:56,619 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 22:21:56,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 22:21:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-12 22:21:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-12 22:21:56,635 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-12 22:21:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:56,635 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-12 22:21:56,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:56,635 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-12 22:21:56,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:56,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:56,636 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:56,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 22:21:56,859 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-06-12 22:21:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:56,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069013458] [2021-06-12 22:21:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:56,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069013458] [2021-06-12 22:21:56,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069013458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282080094] [2021-06-12 22:21:56,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:56,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:21:56,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:57,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282080094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:57,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:57,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:21:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138992590] [2021-06-12 22:21:57,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:21:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:21:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:21:57,035 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:57,349 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-12 22:21:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:21:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:57,356 INFO L225 Difference]: With dead ends: 1196 [2021-06-12 22:21:57,356 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 22:21:57,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:21:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 22:21:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-12 22:21:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-12 22:21:57,377 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-12 22:21:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:57,377 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-12 22:21:57,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-12 22:21:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:57,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:57,379 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:57,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 22:21:57,602 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:57,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-06-12 22:21:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:57,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447566052] [2021-06-12 22:21:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:57,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:57,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:57,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447566052] [2021-06-12 22:21:57,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447566052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:57,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398741143] [2021-06-12 22:21:57,653 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 [2021-06-12 22:21:57,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:57,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398741143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:57,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:57,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:21:57,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803858941] [2021-06-12 22:21:57,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:21:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:57,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:21:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:21:57,770 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:58,231 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-12 22:21:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:21:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:58,237 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 22:21:58,238 INFO L226 Difference]: Without dead ends: 1492 [2021-06-12 22:21:58,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:21:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-12 22:21:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-12 22:21:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-12 22:21:58,261 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-12 22:21:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:58,262 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-12 22:21:58,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-12 22:21:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:58,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:58,263 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:58,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 22:21:58,481 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-06-12 22:21:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:58,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959142777] [2021-06-12 22:21:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:58,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:58,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959142777] [2021-06-12 22:21:58,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959142777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:58,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020922612] [2021-06-12 22:21:58,519 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 [2021-06-12 22:21:58,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:58,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020922612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:58,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:58,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:21:58,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274885087] [2021-06-12 22:21:58,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:21:58,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:21:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:58,642 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:58,891 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-12 22:21:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:21:58,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:58,897 INFO L225 Difference]: With dead ends: 1258 [2021-06-12 22:21:58,897 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 22:21:58,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:21:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 22:21:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-12 22:21:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-12 22:21:58,919 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-12 22:21:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:58,919 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-12 22:21:58,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-12 22:21:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:58,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:58,921 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:59,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:59,141 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-06-12 22:21:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:59,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303867519] [2021-06-12 22:21:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:59,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303867519] [2021-06-12 22:21:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303867519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661191538] [2021-06-12 22:21:59,184 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 [2021-06-12 22:21:59,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:21:59,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:59,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:59,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:59,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661191538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:59,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:21:59,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654558925] [2021-06-12 22:21:59,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:21:59,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:59,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:21:59,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:21:59,328 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:59,639 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-12 22:21:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:21:59,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:21:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:59,644 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 22:21:59,644 INFO L226 Difference]: Without dead ends: 1329 [2021-06-12 22:21:59,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:21:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-12 22:21:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-12 22:21:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-12 22:21:59,667 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-12 22:21:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:59,667 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-12 22:21:59,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-12 22:21:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:21:59,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:59,669 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:59,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:59,885 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:59,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:59,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-06-12 22:21:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:59,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213286274] [2021-06-12 22:21:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:59,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:59,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213286274] [2021-06-12 22:21:59,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213286274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306250981] [2021-06-12 22:21:59,932 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 [2021-06-12 22:21:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:59,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:21:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:00,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306250981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:00,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:00,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:22:00,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196986533] [2021-06-12 22:22:00,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:22:00,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:22:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:22:00,034 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:00,395 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-12 22:22:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:22:00,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:00,402 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 22:22:00,402 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 22:22:00,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:22:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 22:22:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-12 22:22:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-12 22:22:00,427 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-12 22:22:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:00,427 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-12 22:22:00,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-12 22:22:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:00,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:00,430 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:00,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 22:22:00,641 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-06-12 22:22:00,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:00,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042475621] [2021-06-12 22:22:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:00,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:00,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042475621] [2021-06-12 22:22:00,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042475621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:00,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874611063] [2021-06-12 22:22:00,693 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 [2021-06-12 22:22:00,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:00,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:00,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:00,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:00,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874611063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:00,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:00,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:00,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984975826] [2021-06-12 22:22:00,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:00,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:00,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:00,823 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:01,526 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-12 22:22:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:22:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:01,537 INFO L225 Difference]: With dead ends: 2734 [2021-06-12 22:22:01,537 INFO L226 Difference]: Without dead ends: 2734 [2021-06-12 22:22:01,538 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:22:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-12 22:22:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-12 22:22:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-12 22:22:01,587 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-12 22:22:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:01,587 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-12 22:22:01,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-12 22:22:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:01,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:01,590 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:01,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:01,812 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-06-12 22:22:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:01,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267324693] [2021-06-12 22:22:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:01,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:01,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267324693] [2021-06-12 22:22:01,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267324693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:01,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515239322] [2021-06-12 22:22:01,860 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 [2021-06-12 22:22:01,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:01,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:01,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:01,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515239322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:01,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:01,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047720769] [2021-06-12 22:22:01,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:01,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:01,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:01,992 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:02,741 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-12 22:22:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:22:02,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:02,750 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 22:22:02,750 INFO L226 Difference]: Without dead ends: 2693 [2021-06-12 22:22:02,750 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:22:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-12 22:22:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-12 22:22:02,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-12 22:22:02,783 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-12 22:22:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:02,783 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-12 22:22:02,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-12 22:22:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:02,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:02,785 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:03,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 22:22:03,001 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-06-12 22:22:03,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:03,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980749183] [2021-06-12 22:22:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:03,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980749183] [2021-06-12 22:22:03,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980749183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801194111] [2021-06-12 22:22:03,051 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 [2021-06-12 22:22:03,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:03,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:03,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801194111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:03,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:03,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:22:03,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960687143] [2021-06-12 22:22:03,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:22:03,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:22:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:22:03,157 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:03,770 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-12 22:22:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:22:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:03,777 INFO L225 Difference]: With dead ends: 2677 [2021-06-12 22:22:03,777 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 22:22:03,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:22:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 22:22:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-12 22:22:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-12 22:22:03,816 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-12 22:22:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:03,816 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-12 22:22:03,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-12 22:22:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:03,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:03,819 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:04,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 22:22:04,042 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-06-12 22:22:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665329687] [2021-06-12 22:22:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:04,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:04,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665329687] [2021-06-12 22:22:04,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665329687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:04,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695491741] [2021-06-12 22:22:04,084 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 [2021-06-12 22:22:04,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:22:04,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:04,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695491741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:04,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:04,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:22:04,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556637321] [2021-06-12 22:22:04,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:22:04,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:22:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:22:04,194 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:04,751 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-12 22:22:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:22:04,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:04,756 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 22:22:04,756 INFO L226 Difference]: Without dead ends: 2470 [2021-06-12 22:22:04,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:22:04,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-12 22:22:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-12 22:22:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-12 22:22:04,788 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-12 22:22:04,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:04,788 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-12 22:22:04,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-12 22:22:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:04,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:04,790 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:05,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 22:22:05,005 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-06-12 22:22:05,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:05,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496142703] [2021-06-12 22:22:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:05,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:05,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496142703] [2021-06-12 22:22:05,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496142703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:05,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019814184] [2021-06-12 22:22:05,053 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 [2021-06-12 22:22:05,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:22:05,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:05,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:05,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019814184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:05,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:05,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:05,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153442867] [2021-06-12 22:22:05,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:05,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:05,198 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:05,843 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-12 22:22:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:22:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:05,863 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 22:22:05,863 INFO L226 Difference]: Without dead ends: 2514 [2021-06-12 22:22:05,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:22:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-12 22:22:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-12 22:22:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-12 22:22:05,895 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-12 22:22:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:05,895 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-12 22:22:05,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-12 22:22:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:05,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:05,897 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:06,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 22:22:06,113 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:06,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:06,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-06-12 22:22:06,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:06,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510046309] [2021-06-12 22:22:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:06,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510046309] [2021-06-12 22:22:06,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510046309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473916438] [2021-06-12 22:22:06,156 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 [2021-06-12 22:22:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:06,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:06,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473916438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:06,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:06,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:06,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906541209] [2021-06-12 22:22:06,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:06,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:06,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:06,262 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:06,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:06,852 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-12 22:22:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:22:06,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:06,858 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 22:22:06,858 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 22:22:06,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:22:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 22:22:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-12 22:22:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-12 22:22:06,888 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-12 22:22:06,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:06,888 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-12 22:22:06,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:06,888 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-12 22:22:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:06,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:06,890 INFO L472 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] [2021-06-12 22:22:07,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 22:22:07,112 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-06-12 22:22:07,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:07,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367416991] [2021-06-12 22:22:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:07,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:07,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367416991] [2021-06-12 22:22:07,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367416991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:07,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943440779] [2021-06-12 22:22:07,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:07,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:22:07,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:07,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:22:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:07,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943440779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:07,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:07,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:22:07,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196676908] [2021-06-12 22:22:07,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:22:07,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:22:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:22:07,228 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:07,300 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-12 22:22:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:22:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:07,302 INFO L225 Difference]: With dead ends: 929 [2021-06-12 22:22:07,303 INFO L226 Difference]: Without dead ends: 929 [2021-06-12 22:22:07,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:22:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-12 22:22:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-12 22:22:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-12 22:22:07,318 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-12 22:22:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:07,318 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-12 22:22:07,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-12 22:22:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:07,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:07,320 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:07,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:07,539 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:07,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-06-12 22:22:07,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:07,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049710615] [2021-06-12 22:22:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:07,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049710615] [2021-06-12 22:22:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049710615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902157752] [2021-06-12 22:22:07,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:07,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902157752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:07,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:07,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:22:07,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970531866] [2021-06-12 22:22:07,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:22:07,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:22:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:22:07,671 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:07,942 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-12 22:22:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:22:07,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:07,945 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 22:22:07,946 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 22:22:07,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:22:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 22:22:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-12 22:22:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-12 22:22:07,967 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-12 22:22:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:07,967 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-12 22:22:07,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-12 22:22:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:07,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:07,970 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:08,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 22:22:08,193 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-06-12 22:22:08,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:08,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855315978] [2021-06-12 22:22:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:08,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:08,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855315978] [2021-06-12 22:22:08,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855315978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:08,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417255543] [2021-06-12 22:22:08,227 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 [2021-06-12 22:22:08,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:08,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:08,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417255543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:08,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:08,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:22:08,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652885410] [2021-06-12 22:22:08,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:22:08,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:22:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:22:08,323 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:08,567 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-12 22:22:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:22:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:08,570 INFO L225 Difference]: With dead ends: 1605 [2021-06-12 22:22:08,570 INFO L226 Difference]: Without dead ends: 1605 [2021-06-12 22:22:08,570 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:22:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-12 22:22:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-12 22:22:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-12 22:22:08,590 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-12 22:22:08,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:08,590 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-12 22:22:08,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-12 22:22:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:08,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:08,592 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:08,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:08,815 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-06-12 22:22:08,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:08,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385201108] [2021-06-12 22:22:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:08,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:08,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385201108] [2021-06-12 22:22:08,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385201108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:08,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410929517] [2021-06-12 22:22:08,843 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 [2021-06-12 22:22:08,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:08,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:08,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:08,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410929517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:08,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:08,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:22:08,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245169354] [2021-06-12 22:22:08,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:22:08,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:08,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:22:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:22:08,913 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:09,117 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-12 22:22:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:22:09,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:09,120 INFO L225 Difference]: With dead ends: 1524 [2021-06-12 22:22:09,120 INFO L226 Difference]: Without dead ends: 1520 [2021-06-12 22:22:09,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:22:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-12 22:22:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-12 22:22:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-12 22:22:09,139 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-12 22:22:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:09,139 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-12 22:22:09,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-12 22:22:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:09,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:09,141 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:09,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 22:22:09,364 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-06-12 22:22:09,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:09,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757796685] [2021-06-12 22:22:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:09,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:09,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757796685] [2021-06-12 22:22:09,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757796685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:09,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263176137] [2021-06-12 22:22:09,400 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 [2021-06-12 22:22:09,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:22:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:09,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:09,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263176137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:09,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:09,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:22:09,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025447759] [2021-06-12 22:22:09,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:22:09,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:09,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:22:09,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:22:09,503 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:09,738 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-12 22:22:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:22:09,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:09,741 INFO L225 Difference]: With dead ends: 1508 [2021-06-12 22:22:09,741 INFO L226 Difference]: Without dead ends: 1496 [2021-06-12 22:22:09,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:22:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-12 22:22:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-12 22:22:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-12 22:22:09,760 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-12 22:22:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:09,760 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-12 22:22:09,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-12 22:22:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:09,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:09,762 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:09,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:09,983 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:09,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:09,984 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-06-12 22:22:09,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:09,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853265582] [2021-06-12 22:22:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:10,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:10,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853265582] [2021-06-12 22:22:10,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853265582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:10,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145154799] [2021-06-12 22:22:10,027 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 [2021-06-12 22:22:10,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:22:10,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:10,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:10,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145154799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:10,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:10,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:10,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260338539] [2021-06-12 22:22:10,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:10,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:10,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:10,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:10,135 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:10,729 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-12 22:22:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:10,737 INFO L225 Difference]: With dead ends: 2412 [2021-06-12 22:22:10,737 INFO L226 Difference]: Without dead ends: 2412 [2021-06-12 22:22:10,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-12 22:22:10,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-12 22:22:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-12 22:22:10,764 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-12 22:22:10,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:10,764 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-12 22:22:10,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-12 22:22:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:10,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:10,766 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:10,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 22:22:10,981 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-06-12 22:22:10,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:10,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668052523] [2021-06-12 22:22:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:11,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:11,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668052523] [2021-06-12 22:22:11,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668052523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:11,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100227265] [2021-06-12 22:22:11,027 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 [2021-06-12 22:22:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:11,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:11,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100227265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:11,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:11,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:11,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573800759] [2021-06-12 22:22:11,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:11,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:11,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:11,151 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:11,613 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-12 22:22:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:11,617 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 22:22:11,617 INFO L226 Difference]: Without dead ends: 2335 [2021-06-12 22:22:11,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:22:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-12 22:22:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-12 22:22:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:22:11,643 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:22:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:11,643 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:22:11,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:22:11,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:11,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:11,645 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:11,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:11,868 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-06-12 22:22:11,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:11,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418368703] [2021-06-12 22:22:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:11,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:11,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418368703] [2021-06-12 22:22:11,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418368703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:11,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952590709] [2021-06-12 22:22:11,901 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 [2021-06-12 22:22:11,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:11,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:11,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:11,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:12,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952590709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:12,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:12,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:22:12,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005120642] [2021-06-12 22:22:12,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:22:12,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:12,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:22:12,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:22:12,001 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:12,392 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-12 22:22:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:22:12,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:12,395 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 22:22:12,395 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 22:22:12,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:22:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 22:22:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-12 22:22:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:22:12,415 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:22:12,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:12,415 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:22:12,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:12,416 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:22:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:12,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:12,418 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:12,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 22:22:12,633 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-06-12 22:22:12,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:12,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561313515] [2021-06-12 22:22:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:12,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:12,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561313515] [2021-06-12 22:22:12,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561313515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:12,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675651751] [2021-06-12 22:22:12,676 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 [2021-06-12 22:22:12,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:12,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:12,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:12,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:12,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675651751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:12,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:12,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:22:12,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246633451] [2021-06-12 22:22:12,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:22:12,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:22:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:22:12,773 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:13,122 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-12 22:22:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:22:13,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:13,125 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 22:22:13,125 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 22:22:13,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:22:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 22:22:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-12 22:22:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:22:13,141 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:22:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:13,142 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:22:13,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:22:13,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:13,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:13,144 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:13,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:13,359 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:13,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-06-12 22:22:13,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:13,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089426877] [2021-06-12 22:22:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:13,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:13,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089426877] [2021-06-12 22:22:13,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089426877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:13,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267993959] [2021-06-12 22:22:13,398 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 [2021-06-12 22:22:13,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:13,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:13,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:13,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267993959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:13,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:13,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:13,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419852203] [2021-06-12 22:22:13,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:13,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:13,501 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:13,871 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-12 22:22:13,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:22:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:13,874 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 22:22:13,874 INFO L226 Difference]: Without dead ends: 2199 [2021-06-12 22:22:13,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 239.3ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:22:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-12 22:22:13,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-12 22:22:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:22:13,891 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:22:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:13,891 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:22:13,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:22:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:13,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:13,892 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:14,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:22:14,093 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:14,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-06-12 22:22:14,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:14,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612399002] [2021-06-12 22:22:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:14,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612399002] [2021-06-12 22:22:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612399002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176623323] [2021-06-12 22:22:14,137 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 [2021-06-12 22:22:14,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:22:14,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:14,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:14,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:14,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176623323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:14,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:14,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:14,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150645391] [2021-06-12 22:22:14,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:14,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:14,256 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:14,626 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-12 22:22:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:22:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:14,628 INFO L225 Difference]: With dead ends: 2156 [2021-06-12 22:22:14,628 INFO L226 Difference]: Without dead ends: 2152 [2021-06-12 22:22:14,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:22:14,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-12 22:22:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-12 22:22:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:22:14,653 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:22:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:14,653 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:22:14,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:22:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:14,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:14,655 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:14,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 22:22:14,869 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-06-12 22:22:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:14,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20375584] [2021-06-12 22:22:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:14,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20375584] [2021-06-12 22:22:14,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20375584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038710070] [2021-06-12 22:22:14,911 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 [2021-06-12 22:22:14,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:22:14,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:14,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:15,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038710070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:15,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:15,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:22:15,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020766367] [2021-06-12 22:22:15,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:22:15,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:15,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:22:15,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:22:15,010 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:15,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:15,353 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-12 22:22:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:22:15,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:15,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:15,356 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 22:22:15,356 INFO L226 Difference]: Without dead ends: 2097 [2021-06-12 22:22:15,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:22:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-12 22:22:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-12 22:22:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-12 22:22:15,374 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-12 22:22:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:15,374 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-12 22:22:15,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-12 22:22:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:15,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:15,375 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:15,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 22:22:15,577 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-06-12 22:22:15,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:15,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684803966] [2021-06-12 22:22:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:15,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:15,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684803966] [2021-06-12 22:22:15,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684803966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:15,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141107463] [2021-06-12 22:22:15,622 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 [2021-06-12 22:22:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:15,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:15,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141107463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:15,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:15,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:22:15,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110626262] [2021-06-12 22:22:15,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:22:15,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:22:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:22:15,703 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:16,007 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-12 22:22:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:22:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:16,009 INFO L225 Difference]: With dead ends: 1963 [2021-06-12 22:22:16,009 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 22:22:16,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:22:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 22:22:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-12 22:22:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-12 22:22:16,030 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-12 22:22:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:16,030 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-12 22:22:16,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-12 22:22:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:16,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:16,032 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:16,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 22:22:16,253 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:16,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-06-12 22:22:16,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:16,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491787566] [2021-06-12 22:22:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:16,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:16,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491787566] [2021-06-12 22:22:16,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491787566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:16,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552478190] [2021-06-12 22:22:16,302 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 [2021-06-12 22:22:16,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:16,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:16,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552478190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:16,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:16,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:22:16,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398759123] [2021-06-12 22:22:16,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:22:16,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:16,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:22:16,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:22:16,384 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:16,588 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-12 22:22:16,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:22:16,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:16,590 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 22:22:16,590 INFO L226 Difference]: Without dead ends: 1716 [2021-06-12 22:22:16,590 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:22:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-12 22:22:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-12 22:22:16,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-12 22:22:16,604 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-12 22:22:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:16,604 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-12 22:22:16,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-12 22:22:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:16,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:16,606 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:16,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:16,806 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:16,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-06-12 22:22:16,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:16,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894448321] [2021-06-12 22:22:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:16,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:16,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894448321] [2021-06-12 22:22:16,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894448321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559257930] [2021-06-12 22:22:16,846 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 [2021-06-12 22:22:16,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:16,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:16,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:16,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559257930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:16,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:16,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:16,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551721476] [2021-06-12 22:22:16,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:16,958 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:17,308 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-12 22:22:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:22:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:17,310 INFO L225 Difference]: With dead ends: 1821 [2021-06-12 22:22:17,310 INFO L226 Difference]: Without dead ends: 1821 [2021-06-12 22:22:17,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:22:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-12 22:22:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-12 22:22:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-12 22:22:17,328 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-12 22:22:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:17,328 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-12 22:22:17,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-12 22:22:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:17,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:17,331 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:17,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 22:22:17,553 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:17,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-06-12 22:22:17,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:17,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328494312] [2021-06-12 22:22:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:17,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:17,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328494312] [2021-06-12 22:22:17,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328494312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:17,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698992342] [2021-06-12 22:22:17,593 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 [2021-06-12 22:22:17,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:17,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698992342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:17,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:17,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:22:17,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146231710] [2021-06-12 22:22:17,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:22:17,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:22:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:22:17,718 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:17,989 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-12 22:22:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:22:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:17,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:17,991 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 22:22:17,991 INFO L226 Difference]: Without dead ends: 1786 [2021-06-12 22:22:17,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:22:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-12 22:22:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-12 22:22:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-12 22:22:18,008 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-12 22:22:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:18,008 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-12 22:22:18,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-12 22:22:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:22:18,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:18,009 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:18,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 22:22:18,210 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-06-12 22:22:18,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:18,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672153043] [2021-06-12 22:22:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:18,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:18,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672153043] [2021-06-12 22:22:18,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672153043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:18,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816638373] [2021-06-12 22:22:18,249 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 [2021-06-12 22:22:18,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:22:18,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:22:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:18,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816638373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:18,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:18,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:22:18,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40792428] [2021-06-12 22:22:18,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:22:18,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:18,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:22:18,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:22:18,341 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:18,499 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-12 22:22:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:22:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:22:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:18,506 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 22:22:18,506 INFO L226 Difference]: Without dead ends: 1637 [2021-06-12 22:22:18,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-12 22:22:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-12 22:22:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-12 22:22:18,528 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-12 22:22:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:18,528 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-12 22:22:18,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-12 22:22:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:18,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:18,530 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:18,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:18,753 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:18,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:18,753 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-06-12 22:22:18,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595200704] [2021-06-12 22:22:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:19,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:19,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595200704] [2021-06-12 22:22:19,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595200704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:19,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391926236] [2021-06-12 22:22:19,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:19,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:19,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:22:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:19,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:19,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:19,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:19,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:19,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:19,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:19,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391926236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:19,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:19,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:22:19,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566756167] [2021-06-12 22:22:19,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:19,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:19,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:19,323 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:19,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:19,926 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-12 22:22:19,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:22:19,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:22:19,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:19,928 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 22:22:19,928 INFO L226 Difference]: Without dead ends: 1502 [2021-06-12 22:22:19,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 674.8ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:22:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-12 22:22:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-12 22:22:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-12 22:22:19,944 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-12 22:22:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:19,944 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-12 22:22:19,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-12 22:22:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:19,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:19,946 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:20,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 22:22:20,146 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-06-12 22:22:20,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:20,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420604928] [2021-06-12 22:22:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:20,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:20,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420604928] [2021-06-12 22:22:20,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420604928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:20,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108030589] [2021-06-12 22:22:20,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:20,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:22:20,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:20,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:22:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:20,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:20,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:20,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:20,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:20,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:20,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108030589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:20,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:20,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:22:20,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683415777] [2021-06-12 22:22:20,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:20,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:20,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:20,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:20,660 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:22:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:21,171 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-12 22:22:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:22:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 22:22:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:21,173 INFO L225 Difference]: With dead ends: 1495 [2021-06-12 22:22:21,173 INFO L226 Difference]: Without dead ends: 1480 [2021-06-12 22:22:21,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:22:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-12 22:22:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-12 22:22:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-12 22:22:21,188 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-12 22:22:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:21,188 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-12 22:22:21,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:22:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-12 22:22:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:21,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:21,191 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:21,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:21,413 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-06-12 22:22:21,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:21,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692250344] [2021-06-12 22:22:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:21,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:21,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692250344] [2021-06-12 22:22:21,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692250344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:21,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660709844] [2021-06-12 22:22:21,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:21,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:22:21,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:22:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:21,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:21,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:21,993 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 21 treesize of output 11 [2021-06-12 22:22:21,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:21,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:22,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:22,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:22:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:22,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660709844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:22,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:22,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:22:22,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009343842] [2021-06-12 22:22:22,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:22,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:22,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:22,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:22,017 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-12 22:22:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:24,033 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-06-12 22:22:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:22:24,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:22:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:24,036 INFO L225 Difference]: With dead ends: 1658 [2021-06-12 22:22:24,036 INFO L226 Difference]: Without dead ends: 1643 [2021-06-12 22:22:24,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2051.0ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:22:24,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-12 22:22:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-06-12 22:22:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-12 22:22:24,051 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-12 22:22:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:24,051 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-12 22:22:24,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-12 22:22:24,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-12 22:22:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:24,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:24,053 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:24,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 22:22:24,254 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-06-12 22:22:24,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:24,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434321016] [2021-06-12 22:22:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:24,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:24,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:24,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434321016] [2021-06-12 22:22:24,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434321016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:24,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394792476] [2021-06-12 22:22:24,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:24,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:22:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:22:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:24,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:24,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:24,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:24,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:24,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:24,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:24,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394792476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:24,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:24,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:22:24,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897785186] [2021-06-12 22:22:24,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:24,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:24,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:24,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:24,783 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:22:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:25,667 INFO L93 Difference]: Finished difference Result 1641 states and 5247 transitions. [2021-06-12 22:22:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:22:25,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 22:22:25,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:25,670 INFO L225 Difference]: With dead ends: 1641 [2021-06-12 22:22:25,670 INFO L226 Difference]: Without dead ends: 1626 [2021-06-12 22:22:25,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 905.2ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:22:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-06-12 22:22:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1189. [2021-06-12 22:22:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-12 22:22:25,684 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-12 22:22:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:25,684 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-12 22:22:25,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:22:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-12 22:22:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:25,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:25,686 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:25,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:25,887 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:25,887 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-06-12 22:22:25,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:25,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518125030] [2021-06-12 22:22:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:26,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:26,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518125030] [2021-06-12 22:22:26,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518125030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:26,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316427419] [2021-06-12 22:22:26,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:26,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:22:26,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:26,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:26,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:26,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 22:22:26,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:26,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:26,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:26,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:22:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:26,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316427419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:26,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:26,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:22:26,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961060422] [2021-06-12 22:22:26,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:26,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:26,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:26,501 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:22:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:28,544 INFO L93 Difference]: Finished difference Result 1880 states and 5988 transitions. [2021-06-12 22:22:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:22:28,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-12 22:22:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:28,548 INFO L225 Difference]: With dead ends: 1880 [2021-06-12 22:22:28,548 INFO L226 Difference]: Without dead ends: 1865 [2021-06-12 22:22:28,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2034.4ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:22:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-12 22:22:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1201. [2021-06-12 22:22:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-12 22:22:28,563 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-12 22:22:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:28,563 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-12 22:22:28,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:22:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-12 22:22:28,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:28,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:28,565 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:28,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 22:22:28,766 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-06-12 22:22:28,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:28,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555528182] [2021-06-12 22:22:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:29,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555528182] [2021-06-12 22:22:29,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555528182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590875529] [2021-06-12 22:22:29,076 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 [2021-06-12 22:22:29,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:29,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:22:29,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:29,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:29,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:29,292 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 21 treesize of output 37 [2021-06-12 22:22:29,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:22:29,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:29,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:29,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-06-12 22:22:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:29,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590875529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:29,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:29,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:22:29,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80102012] [2021-06-12 22:22:29,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:22:29,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:29,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:22:29,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:22:29,417 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 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) [2021-06-12 22:22:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:31,030 INFO L93 Difference]: Finished difference Result 2084 states and 6623 transitions. [2021-06-12 22:22:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:22:31,031 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 26 [2021-06-12 22:22:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:31,033 INFO L225 Difference]: With dead ends: 2084 [2021-06-12 22:22:31,033 INFO L226 Difference]: Without dead ends: 2069 [2021-06-12 22:22:31,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1419.9ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:22:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-12 22:22:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1211. [2021-06-12 22:22:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3446280991735535) internal successors, (4047), 1210 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4047 transitions. [2021-06-12 22:22:31,058 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4047 transitions. Word has length 26 [2021-06-12 22:22:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:31,058 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4047 transitions. [2021-06-12 22:22:31,058 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) [2021-06-12 22:22:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4047 transitions. [2021-06-12 22:22:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:31,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:31,060 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:31,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 22:22:31,260 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-06-12 22:22:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:31,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619215085] [2021-06-12 22:22:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:31,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619215085] [2021-06-12 22:22:31,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619215085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609661713] [2021-06-12 22:22:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:22:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:22:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:31,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:31,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:31,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:31,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:31,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:31,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:31,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609661713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:31,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:31,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:22:31,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181574932] [2021-06-12 22:22:31,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:31,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:31,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:31,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:31,734 INFO L87 Difference]: Start difference. First operand 1211 states and 4047 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:32,429 INFO L93 Difference]: Finished difference Result 1614 states and 5256 transitions. [2021-06-12 22:22:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:22:32,429 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:22:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:32,432 INFO L225 Difference]: With dead ends: 1614 [2021-06-12 22:22:32,432 INFO L226 Difference]: Without dead ends: 1599 [2021-06-12 22:22:32,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:22:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-12 22:22:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-06-12 22:22:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3415233415233416) internal successors, (4080), 1221 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4080 transitions. [2021-06-12 22:22:32,447 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4080 transitions. Word has length 26 [2021-06-12 22:22:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:32,447 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4080 transitions. [2021-06-12 22:22:32,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4080 transitions. [2021-06-12 22:22:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:32,448 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:32,449 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:32,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 22:22:32,649 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-06-12 22:22:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:32,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682543669] [2021-06-12 22:22:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:32,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:32,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682543669] [2021-06-12 22:22:32,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682543669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:32,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018867131] [2021-06-12 22:22:32,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:32,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:32,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:32,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:22:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:33,095 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:22:33,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-12 22:22:33,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:33,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:33,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:33,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:105 [2021-06-12 22:22:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:33,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018867131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:33,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:33,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:22:33,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37680176] [2021-06-12 22:22:33,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:33,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:33,257 INFO L87 Difference]: Start difference. First operand 1222 states and 4080 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 22:22:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:35,298 INFO L93 Difference]: Finished difference Result 1877 states and 5972 transitions. [2021-06-12 22:22:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:22:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:22:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:35,300 INFO L225 Difference]: With dead ends: 1877 [2021-06-12 22:22:35,301 INFO L226 Difference]: Without dead ends: 1862 [2021-06-12 22:22:35,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1732.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:22:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-12 22:22:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1233. [2021-06-12 22:22:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3506493506493507) internal successors, (4128), 1232 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4128 transitions. [2021-06-12 22:22:35,318 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4128 transitions. Word has length 26 [2021-06-12 22:22:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:35,318 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4128 transitions. [2021-06-12 22:22:35,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 22:22:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4128 transitions. [2021-06-12 22:22:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:35,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:35,320 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:35,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 22:22:35,521 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-06-12 22:22:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:35,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100431171] [2021-06-12 22:22:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:35,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:35,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100431171] [2021-06-12 22:22:35,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100431171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:35,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946152627] [2021-06-12 22:22:35,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:35,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:35,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:35,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:22:35,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:35,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:35,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:36,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:36,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:36,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-12 22:22:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946152627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:36,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:36,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:22:36,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986033215] [2021-06-12 22:22:36,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:36,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:36,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:36,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:36,024 INFO L87 Difference]: Start difference. First operand 1233 states and 4128 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:37,004 INFO L93 Difference]: Finished difference Result 1868 states and 6061 transitions. [2021-06-12 22:22:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:22:37,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:22:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:37,007 INFO L225 Difference]: With dead ends: 1868 [2021-06-12 22:22:37,007 INFO L226 Difference]: Without dead ends: 1853 [2021-06-12 22:22:37,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:22:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-12 22:22:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-12 22:22:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.35535858178888) internal successors, (4164), 1241 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:37,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4164 transitions. [2021-06-12 22:22:37,025 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4164 transitions. Word has length 26 [2021-06-12 22:22:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:37,025 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4164 transitions. [2021-06-12 22:22:37,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4164 transitions. [2021-06-12 22:22:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:37,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:37,027 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:37,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:37,227 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-06-12 22:22:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:37,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923451211] [2021-06-12 22:22:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:37,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:37,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923451211] [2021-06-12 22:22:37,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923451211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:37,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950966065] [2021-06-12 22:22:37,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:37,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:37,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:22:37,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:37,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:37,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:37,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:37,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:37,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:37,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:37,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950966065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:37,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:37,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:22:37,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464519358] [2021-06-12 22:22:37,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:22:37,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:37,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:22:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:22:37,655 INFO L87 Difference]: Start difference. First operand 1242 states and 4164 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:22:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:37,989 INFO L93 Difference]: Finished difference Result 1425 states and 4676 transitions. [2021-06-12 22:22:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:22:37,989 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-12 22:22:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:37,991 INFO L225 Difference]: With dead ends: 1425 [2021-06-12 22:22:37,991 INFO L226 Difference]: Without dead ends: 1410 [2021-06-12 22:22:37,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:22:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-06-12 22:22:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1238. [2021-06-12 22:22:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.354890864995958) internal successors, (4150), 1237 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4150 transitions. [2021-06-12 22:22:38,009 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4150 transitions. Word has length 26 [2021-06-12 22:22:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:38,009 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4150 transitions. [2021-06-12 22:22:38,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:22:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4150 transitions. [2021-06-12 22:22:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:38,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:38,011 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:38,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:38,212 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:38,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:38,212 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-06-12 22:22:38,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:38,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929563269] [2021-06-12 22:22:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:38,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:38,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929563269] [2021-06-12 22:22:38,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929563269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:38,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976855532] [2021-06-12 22:22:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:38,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:22:38,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:38,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:22:38,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:38,656 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:22:38,656 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-12 22:22:38,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:38,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:38,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:38,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-12 22:22:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:38,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976855532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:38,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:38,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:22:38,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675508045] [2021-06-12 22:22:38,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:38,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:38,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:38,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:38,727 INFO L87 Difference]: Start difference. First operand 1238 states and 4150 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) [2021-06-12 22:22:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:40,129 INFO L93 Difference]: Finished difference Result 2068 states and 6701 transitions. [2021-06-12 22:22:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:22:40,129 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 26 [2021-06-12 22:22:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:40,133 INFO L225 Difference]: With dead ends: 2068 [2021-06-12 22:22:40,133 INFO L226 Difference]: Without dead ends: 2053 [2021-06-12 22:22:40,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:22:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-12 22:22:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1241. [2021-06-12 22:22:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.3588709677419355) internal successors, (4165), 1240 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4165 transitions. [2021-06-12 22:22:40,151 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4165 transitions. Word has length 26 [2021-06-12 22:22:40,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:40,151 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4165 transitions. [2021-06-12 22:22:40,151 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) [2021-06-12 22:22:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4165 transitions. [2021-06-12 22:22:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:40,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:40,153 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:40,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 22:22:40,354 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-06-12 22:22:40,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:40,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742055255] [2021-06-12 22:22:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:40,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742055255] [2021-06-12 22:22:40,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742055255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636643712] [2021-06-12 22:22:40,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:40,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:22:40,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:40,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:22:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:40,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:40,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:40,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:40,732 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 22 treesize of output 20 [2021-06-12 22:22:40,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:22:40,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:40,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:40,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-12 22:22:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:40,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636643712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:40,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:40,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:22:40,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548074872] [2021-06-12 22:22:40,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:40,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:40,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:40,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:40,786 INFO L87 Difference]: Start difference. First operand 1241 states and 4165 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-06-12 22:22:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:42,085 INFO L93 Difference]: Finished difference Result 1837 states and 5986 transitions. [2021-06-12 22:22:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:22:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-12 22:22:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:42,088 INFO L225 Difference]: With dead ends: 1837 [2021-06-12 22:22:42,088 INFO L226 Difference]: Without dead ends: 1822 [2021-06-12 22:22:42,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1146.4ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:22:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-06-12 22:22:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2021-06-12 22:22:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.360418342719228) internal successors, (4177), 1243 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4177 transitions. [2021-06-12 22:22:42,105 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4177 transitions. Word has length 26 [2021-06-12 22:22:42,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:42,105 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4177 transitions. [2021-06-12 22:22:42,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-06-12 22:22:42,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4177 transitions. [2021-06-12 22:22:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:42,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:42,107 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:42,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 22:22:42,308 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:42,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:42,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1212092298, now seen corresponding path program 13 times [2021-06-12 22:22:42,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:42,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687843798] [2021-06-12 22:22:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:42,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:42,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687843798] [2021-06-12 22:22:42,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687843798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:42,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431525614] [2021-06-12 22:22:42,538 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 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 [2021-06-12 22:22:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:22:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:42,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:42,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:42,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:42,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:42,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:42,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:42,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431525614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:42,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:42,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:22:42,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866156286] [2021-06-12 22:22:42,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:42,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:42,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:42,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:42,753 INFO L87 Difference]: Start difference. First operand 1244 states and 4177 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:22:43,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:43,602 INFO L93 Difference]: Finished difference Result 1881 states and 6019 transitions. [2021-06-12 22:22:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:22:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 22:22:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:43,605 INFO L225 Difference]: With dead ends: 1881 [2021-06-12 22:22:43,605 INFO L226 Difference]: Without dead ends: 1866 [2021-06-12 22:22:43,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 763.3ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:22:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-12 22:22:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1246. [2021-06-12 22:22:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-12 22:22:43,621 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-12 22:22:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:43,621 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-12 22:22:43,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:22:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-12 22:22:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:43,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:43,623 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:43,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:43,842 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:43,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-06-12 22:22:43,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:43,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133325858] [2021-06-12 22:22:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:44,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:44,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133325858] [2021-06-12 22:22:44,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133325858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:44,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417051523] [2021-06-12 22:22:44,064 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 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 [2021-06-12 22:22:44,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:44,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:22:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:44,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:44,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:44,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:44,221 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 21 treesize of output 11 [2021-06-12 22:22:44,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:44,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:44,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:44,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:22:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:44,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417051523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:44,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:44,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 22:22:44,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245922891] [2021-06-12 22:22:44,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:44,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:44,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:44,250 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:22:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:46,186 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-06-12 22:22:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:22:46,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-12 22:22:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:46,190 INFO L225 Difference]: With dead ends: 2938 [2021-06-12 22:22:46,191 INFO L226 Difference]: Without dead ends: 2893 [2021-06-12 22:22:46,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1739.4ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:22:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-12 22:22:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-06-12 22:22:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-12 22:22:46,211 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-12 22:22:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:46,212 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-12 22:22:46,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:22:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-12 22:22:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:46,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:46,214 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:46,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:46,414 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:46,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1493004622, now seen corresponding path program 14 times [2021-06-12 22:22:46,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:46,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592467960] [2021-06-12 22:22:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:46,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:46,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592467960] [2021-06-12 22:22:46,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592467960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045915670] [2021-06-12 22:22:46,657 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 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 [2021-06-12 22:22:46,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:46,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:22:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:46,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:46,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 22:22:46,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:46,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:46,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:46,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-06-12 22:22:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:47,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045915670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:47,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:47,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:22:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502255810] [2021-06-12 22:22:47,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:47,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:47,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:47,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:47,088 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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) [2021-06-12 22:22:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:49,283 INFO L93 Difference]: Finished difference Result 2343 states and 7345 transitions. [2021-06-12 22:22:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:22:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 26 [2021-06-12 22:22:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:49,286 INFO L225 Difference]: With dead ends: 2343 [2021-06-12 22:22:49,286 INFO L226 Difference]: Without dead ends: 2313 [2021-06-12 22:22:49,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2050.8ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:22:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-12 22:22:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1291. [2021-06-12 22:22:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.372093023255814) internal successors, (4350), 1290 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4350 transitions. [2021-06-12 22:22:49,307 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4350 transitions. Word has length 26 [2021-06-12 22:22:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:49,307 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 4350 transitions. [2021-06-12 22:22:49,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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) [2021-06-12 22:22:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4350 transitions. [2021-06-12 22:22:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:49,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:49,309 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-12 22:22:49,510 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1417319858, now seen corresponding path program 15 times [2021-06-12 22:22:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826747170] [2021-06-12 22:22:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:49,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:49,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826747170] [2021-06-12 22:22:49,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826747170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:49,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261767021] [2021-06-12 22:22:49,714 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 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 [2021-06-12 22:22:49,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:22:49,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:49,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:22:49,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:49,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:49,940 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 20 treesize of output 20 [2021-06-12 22:22:49,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:22:49,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:49,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:49,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-12 22:22:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:50,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261767021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:50,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:50,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 22:22:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559573055] [2021-06-12 22:22:50,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:50,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:50,001 INFO L87 Difference]: Start difference. First operand 1291 states and 4350 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:22:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:51,665 INFO L93 Difference]: Finished difference Result 2291 states and 7285 transitions. [2021-06-12 22:22:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:22:51,666 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-12 22:22:51,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:51,669 INFO L225 Difference]: With dead ends: 2291 [2021-06-12 22:22:51,669 INFO L226 Difference]: Without dead ends: 2276 [2021-06-12 22:22:51,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1449.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:22:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-12 22:22:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1288. [2021-06-12 22:22:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.370629370629371) internal successors, (4338), 1287 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4338 transitions. [2021-06-12 22:22:51,688 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4338 transitions. Word has length 26 [2021-06-12 22:22:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:51,688 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4338 transitions. [2021-06-12 22:22:51,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:22:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4338 transitions. [2021-06-12 22:22:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:51,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:51,689 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:51,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:51,890 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-06-12 22:22:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:51,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175619732] [2021-06-12 22:22:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:52,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175619732] [2021-06-12 22:22:52,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175619732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:52,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506862895] [2021-06-12 22:22:52,128 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 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 [2021-06-12 22:22:52,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:52,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:22:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:52,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:52,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:52,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:52,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:52,298 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 21 treesize of output 11 [2021-06-12 22:22:52,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:52,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:52,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:52,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:22:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506862895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:52,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:52,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 22:22:52,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683400373] [2021-06-12 22:22:52,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:52,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:52,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:52,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:52,325 INFO L87 Difference]: Start difference. First operand 1288 states and 4338 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:22:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:54,019 INFO L93 Difference]: Finished difference Result 2760 states and 8712 transitions. [2021-06-12 22:22:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-12 22:22:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:54,023 INFO L225 Difference]: With dead ends: 2760 [2021-06-12 22:22:54,023 INFO L226 Difference]: Without dead ends: 2715 [2021-06-12 22:22:54,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1590.8ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:22:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-12 22:22:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1284. [2021-06-12 22:22:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3795791114575215) internal successors, (4336), 1283 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4336 transitions. [2021-06-12 22:22:54,043 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4336 transitions. Word has length 26 [2021-06-12 22:22:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:54,043 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4336 transitions. [2021-06-12 22:22:54,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:22:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4336 transitions. [2021-06-12 22:22:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:54,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:54,045 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:54,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:54,247 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-06-12 22:22:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:54,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062680731] [2021-06-12 22:22:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:54,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062680731] [2021-06-12 22:22:54,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062680731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901458710] [2021-06-12 22:22:54,515 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 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 [2021-06-12 22:22:54,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:22:54,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:22:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:54,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:54,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:54,675 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 21 treesize of output 39 [2021-06-12 22:22:54,692 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:22:54,715 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-12 22:22:54,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:54,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-12 22:22:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:54,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901458710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:54,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:54,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 22:22:54,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789889034] [2021-06-12 22:22:54,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:54,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:54,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:54,788 INFO L87 Difference]: Start difference. First operand 1284 states and 4336 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:22:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:57,282 INFO L93 Difference]: Finished difference Result 3079 states and 9642 transitions. [2021-06-12 22:22:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:22:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-12 22:22:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:57,286 INFO L225 Difference]: With dead ends: 3079 [2021-06-12 22:22:57,286 INFO L226 Difference]: Without dead ends: 3034 [2021-06-12 22:22:57,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2114.1ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:22:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-06-12 22:22:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1288. [2021-06-12 22:22:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3853923853923855) internal successors, (4357), 1287 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4357 transitions. [2021-06-12 22:22:57,319 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4357 transitions. Word has length 26 [2021-06-12 22:22:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:57,319 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4357 transitions. [2021-06-12 22:22:57,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:22:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4357 transitions. [2021-06-12 22:22:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:57,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:57,322 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:57,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:57,546 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:57,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:57,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 16 times [2021-06-12 22:22:57,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:57,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176502390] [2021-06-12 22:22:57,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:57,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:57,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:57,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176502390] [2021-06-12 22:22:57,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176502390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:57,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871099603] [2021-06-12 22:22:57,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:57,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:57,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:22:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:58,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:58,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:58,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:58,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:58,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:58,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:58,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:58,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871099603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:58,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:58,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:22:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906807319] [2021-06-12 22:22:58,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:58,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:58,061 INFO L87 Difference]: Start difference. First operand 1288 states and 4357 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:58,540 INFO L93 Difference]: Finished difference Result 1650 states and 5457 transitions. [2021-06-12 22:22:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:22:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:22:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:58,543 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 22:22:58,544 INFO L226 Difference]: Without dead ends: 1635 [2021-06-12 22:22:58,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:22:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-12 22:22:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1305. [2021-06-12 22:22:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.3803680981595092) internal successors, (4408), 1304 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:58,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4408 transitions. [2021-06-12 22:22:58,560 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4408 transitions. Word has length 26 [2021-06-12 22:22:58,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:58,560 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 4408 transitions. [2021-06-12 22:22:58,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4408 transitions. [2021-06-12 22:22:58,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:58,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:58,562 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:58,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:58,777 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1110153644, now seen corresponding path program 17 times [2021-06-12 22:22:58,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:58,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843821770] [2021-06-12 22:22:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:59,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:59,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843821770] [2021-06-12 22:22:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843821770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:59,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069326790] [2021-06-12 22:22:59,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:59,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:22:59,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:22:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:59,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:22:59,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:22:59,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:59,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:59,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:59,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:22:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:59,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069326790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:59,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:59,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:22:59,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448224483] [2021-06-12 22:22:59,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:59,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:59,287 INFO L87 Difference]: Start difference. First operand 1305 states and 4408 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:59,968 INFO L93 Difference]: Finished difference Result 1637 states and 5415 transitions. [2021-06-12 22:22:59,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:22:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:22:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:59,971 INFO L225 Difference]: With dead ends: 1637 [2021-06-12 22:22:59,971 INFO L226 Difference]: Without dead ends: 1622 [2021-06-12 22:22:59,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:22:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-12 22:22:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1297. [2021-06-12 22:22:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-12 22:22:59,986 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-12 22:22:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:59,987 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-12 22:22:59,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-12 22:22:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:22:59,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:59,989 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:00,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-12 22:23:00,189 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 18 times [2021-06-12 22:23:00,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:00,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563580422] [2021-06-12 22:23:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:00,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563580422] [2021-06-12 22:23:00,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563580422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954592239] [2021-06-12 22:23:00,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:23:00,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:23:00,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:00,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:00,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:00,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:23:00,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:00,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:00,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:00,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-12 22:23:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:00,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954592239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:00,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:00,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:00,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652229176] [2021-06-12 22:23:00,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:00,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:00,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:00,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:00,681 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:01,493 INFO L93 Difference]: Finished difference Result 1880 states and 6175 transitions. [2021-06-12 22:23:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:23:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:01,496 INFO L225 Difference]: With dead ends: 1880 [2021-06-12 22:23:01,496 INFO L226 Difference]: Without dead ends: 1865 [2021-06-12 22:23:01,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:23:01,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-06-12 22:23:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1306. [2021-06-12 22:23:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-06-12 22:23:01,516 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-06-12 22:23:01,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:01,516 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-06-12 22:23:01,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:01,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-06-12 22:23:01,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:01,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:01,518 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:01,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:01,718 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 19 times [2021-06-12 22:23:01,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:01,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727058205] [2021-06-12 22:23:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:01,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:01,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727058205] [2021-06-12 22:23:01,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727058205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:01,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613495043] [2021-06-12 22:23:01,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:23:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:02,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:02,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:23:02,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:02,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:02,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:02,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:23:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:02,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613495043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:02,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:02,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:23:02,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900779073] [2021-06-12 22:23:02,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:23:02,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:02,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:23:02,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:23:02,178 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:23:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:02,428 INFO L93 Difference]: Finished difference Result 1472 states and 4885 transitions. [2021-06-12 22:23:02,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:23:02,429 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-12 22:23:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:02,431 INFO L225 Difference]: With dead ends: 1472 [2021-06-12 22:23:02,431 INFO L226 Difference]: Without dead ends: 1457 [2021-06-12 22:23:02,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-06-12 22:23:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1300. [2021-06-12 22:23:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.3887605850654348) internal successors, (4402), 1299 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4402 transitions. [2021-06-12 22:23:02,454 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4402 transitions. Word has length 26 [2021-06-12 22:23:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:02,454 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4402 transitions. [2021-06-12 22:23:02,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:23:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4402 transitions. [2021-06-12 22:23:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:02,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:02,457 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:02,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-12 22:23:02,673 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 20 times [2021-06-12 22:23:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:02,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407447293] [2021-06-12 22:23:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:02,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:02,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407447293] [2021-06-12 22:23:02,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407447293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:02,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785003937] [2021-06-12 22:23:02,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:02,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:02,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:03,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:03,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-12 22:23:03,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:03,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:03,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:23:03,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-12 22:23:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:03,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785003937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:03,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:03,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:03,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418277069] [2021-06-12 22:23:03,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:03,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:03,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:03,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:03,248 INFO L87 Difference]: Start difference. First operand 1300 states and 4402 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:04,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:04,274 INFO L93 Difference]: Finished difference Result 2107 states and 6896 transitions. [2021-06-12 22:23:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:23:04,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-12 22:23:04,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:04,277 INFO L225 Difference]: With dead ends: 2107 [2021-06-12 22:23:04,277 INFO L226 Difference]: Without dead ends: 2092 [2021-06-12 22:23:04,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:23:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-12 22:23:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1297. [2021-06-12 22:23:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-12 22:23:04,298 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-12 22:23:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:04,298 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-12 22:23:04,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-12 22:23:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:04,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:04,300 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:04,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:04,501 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 21 times [2021-06-12 22:23:04,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:04,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878597319] [2021-06-12 22:23:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:04,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878597319] [2021-06-12 22:23:04,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878597319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:04,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430933365] [2021-06-12 22:23:04,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:04,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:23:04,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:04,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:23:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:05,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:23:05,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:05,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:05,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:05,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:23:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:05,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430933365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:05,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:05,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 22:23:05,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195957232] [2021-06-12 22:23:05,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:05,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:05,035 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:23:06,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:06,187 INFO L93 Difference]: Finished difference Result 1853 states and 6048 transitions. [2021-06-12 22:23:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:23:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 22:23:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:06,190 INFO L225 Difference]: With dead ends: 1853 [2021-06-12 22:23:06,190 INFO L226 Difference]: Without dead ends: 1838 [2021-06-12 22:23:06,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1067.2ms TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:23:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-12 22:23:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1293. [2021-06-12 22:23:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.3823529411764706) internal successors, (4370), 1292 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4370 transitions. [2021-06-12 22:23:06,207 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4370 transitions. Word has length 26 [2021-06-12 22:23:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:06,207 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4370 transitions. [2021-06-12 22:23:06,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:23:06,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4370 transitions. [2021-06-12 22:23:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:06,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:06,209 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:06,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 22:23:06,410 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:06,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 22 times [2021-06-12 22:23:06,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:06,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991435996] [2021-06-12 22:23:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:06,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:06,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991435996] [2021-06-12 22:23:06,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991435996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:06,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767511407] [2021-06-12 22:23:06,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:06,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:06,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:23:06,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:06,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:06,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:23:06,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:06,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:06,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:06,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:23:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:06,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767511407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:06,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:06,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:06,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062325971] [2021-06-12 22:23:06,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:06,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:06,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:06,875 INFO L87 Difference]: Start difference. First operand 1293 states and 4370 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:07,411 INFO L93 Difference]: Finished difference Result 1726 states and 5675 transitions. [2021-06-12 22:23:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:23:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:07,414 INFO L225 Difference]: With dead ends: 1726 [2021-06-12 22:23:07,414 INFO L226 Difference]: Without dead ends: 1705 [2021-06-12 22:23:07,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 530.7ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:23:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-12 22:23:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2021-06-12 22:23:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.377344336084021) internal successors, (4502), 1333 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4502 transitions. [2021-06-12 22:23:07,431 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4502 transitions. Word has length 26 [2021-06-12 22:23:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:07,431 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4502 transitions. [2021-06-12 22:23:07,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4502 transitions. [2021-06-12 22:23:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:07,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:07,433 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:07,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:07,633 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:07,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 23 times [2021-06-12 22:23:07,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283341391] [2021-06-12 22:23:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:07,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:07,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283341391] [2021-06-12 22:23:07,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283341391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:07,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255543976] [2021-06-12 22:23:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:07,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:23:07,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:07,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:23:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:08,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:08,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:08,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-12 22:23:08,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:08,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:08,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:08,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-12 22:23:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:08,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255543976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:08,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:08,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:23:08,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885564266] [2021-06-12 22:23:08,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:23:08,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:23:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:23:08,113 INFO L87 Difference]: Start difference. First operand 1334 states and 4502 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:23:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:08,544 INFO L93 Difference]: Finished difference Result 1470 states and 4841 transitions. [2021-06-12 22:23:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:23:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-12 22:23:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:08,546 INFO L225 Difference]: With dead ends: 1470 [2021-06-12 22:23:08,546 INFO L226 Difference]: Without dead ends: 1451 [2021-06-12 22:23:08,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-12 22:23:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1328. [2021-06-12 22:23:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.376789751318764) internal successors, (4481), 1327 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4481 transitions. [2021-06-12 22:23:08,561 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4481 transitions. Word has length 26 [2021-06-12 22:23:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:08,561 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4481 transitions. [2021-06-12 22:23:08,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:23:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4481 transitions. [2021-06-12 22:23:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:08,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:08,563 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:08,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 22:23:08,764 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 24 times [2021-06-12 22:23:08,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:08,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94029437] [2021-06-12 22:23:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:09,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:09,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94029437] [2021-06-12 22:23:09,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94029437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:09,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581223813] [2021-06-12 22:23:09,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:09,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:23:09,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:09,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:23:09,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:09,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:09,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:09,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:09,209 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 22 treesize of output 22 [2021-06-12 22:23:09,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:09,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:09,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:09,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:28 [2021-06-12 22:23:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:09,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581223813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:09,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:09,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:09,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278478684] [2021-06-12 22:23:09,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:09,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:09,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:09,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:09,283 INFO L87 Difference]: Start difference. First operand 1328 states and 4481 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:09,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:09,980 INFO L93 Difference]: Finished difference Result 1962 states and 6398 transitions. [2021-06-12 22:23:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:23:09,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-12 22:23:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:09,983 INFO L225 Difference]: With dead ends: 1962 [2021-06-12 22:23:09,983 INFO L226 Difference]: Without dead ends: 1937 [2021-06-12 22:23:09,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:23:09,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-12 22:23:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1331. [2021-06-12 22:23:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3774436090225564) internal successors, (4492), 1330 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4492 transitions. [2021-06-12 22:23:10,001 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4492 transitions. Word has length 26 [2021-06-12 22:23:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:10,001 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4492 transitions. [2021-06-12 22:23:10,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4492 transitions. [2021-06-12 22:23:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:10,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:10,004 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:10,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 22:23:10,206 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:10,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 25 times [2021-06-12 22:23:10,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:10,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816407828] [2021-06-12 22:23:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:10,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:10,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816407828] [2021-06-12 22:23:10,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816407828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:10,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011909478] [2021-06-12 22:23:10,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:23:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:10,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:10,649 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:23:10,649 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 38 treesize of output 36 [2021-06-12 22:23:10,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:10,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:10,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:10,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:5 [2021-06-12 22:23:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:10,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011909478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:10,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:10,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:23:10,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978733296] [2021-06-12 22:23:10,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:23:10,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:23:10,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:23:10,675 INFO L87 Difference]: Start difference. First operand 1331 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:23:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:11,025 INFO L93 Difference]: Finished difference Result 1522 states and 5028 transitions. [2021-06-12 22:23:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:23:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-12 22:23:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:11,028 INFO L225 Difference]: With dead ends: 1522 [2021-06-12 22:23:11,028 INFO L226 Difference]: Without dead ends: 1507 [2021-06-12 22:23:11,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:11,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-06-12 22:23:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1337. [2021-06-12 22:23:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.379491017964072) internal successors, (4515), 1336 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4515 transitions. [2021-06-12 22:23:11,042 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4515 transitions. Word has length 26 [2021-06-12 22:23:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:11,042 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4515 transitions. [2021-06-12 22:23:11,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-06-12 22:23:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4515 transitions. [2021-06-12 22:23:11,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:11,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:11,044 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:11,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 22:23:11,244 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 26 times [2021-06-12 22:23:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:11,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785451212] [2021-06-12 22:23:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:11,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:11,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785451212] [2021-06-12 22:23:11,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785451212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:11,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185407781] [2021-06-12 22:23:11,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:11,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:11,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:11,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:11,674 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:11,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-12 22:23:11,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:11,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:11,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:11,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-12 22:23:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:11,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185407781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:11,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:11,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:23:11,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899047273] [2021-06-12 22:23:11,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:11,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:11,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:11,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:11,742 INFO L87 Difference]: Start difference. First operand 1337 states and 4515 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:12,290 INFO L93 Difference]: Finished difference Result 1802 states and 5923 transitions. [2021-06-12 22:23:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:23:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:12,293 INFO L225 Difference]: With dead ends: 1802 [2021-06-12 22:23:12,293 INFO L226 Difference]: Without dead ends: 1777 [2021-06-12 22:23:12,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:23:12,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-12 22:23:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1344. [2021-06-12 22:23:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3842144452717795) internal successors, (4545), 1343 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4545 transitions. [2021-06-12 22:23:12,309 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4545 transitions. Word has length 26 [2021-06-12 22:23:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:12,309 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4545 transitions. [2021-06-12 22:23:12,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4545 transitions. [2021-06-12 22:23:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:12,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:12,310 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:12,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:12,511 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:12,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 27 times [2021-06-12 22:23:12,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:12,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065292268] [2021-06-12 22:23:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:12,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:12,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065292268] [2021-06-12 22:23:12,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065292268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:12,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977234383] [2021-06-12 22:23:12,764 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 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 [2021-06-12 22:23:12,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:23:12,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:12,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:23:12,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:12,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:12,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:23:12,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:13,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:13,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:13,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:23:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:13,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977234383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:13,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:13,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:13,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309653875] [2021-06-12 22:23:13,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:13,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:13,024 INFO L87 Difference]: Start difference. First operand 1344 states and 4545 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:23:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:13,720 INFO L93 Difference]: Finished difference Result 1709 states and 5671 transitions. [2021-06-12 22:23:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:23:13,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 22:23:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:13,723 INFO L225 Difference]: With dead ends: 1709 [2021-06-12 22:23:13,723 INFO L226 Difference]: Without dead ends: 1694 [2021-06-12 22:23:13,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:23:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-12 22:23:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1355. [2021-06-12 22:23:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.3840472673559825) internal successors, (4582), 1354 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4582 transitions. [2021-06-12 22:23:13,745 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4582 transitions. Word has length 26 [2021-06-12 22:23:13,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:13,745 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4582 transitions. [2021-06-12 22:23:13,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:23:13,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4582 transitions. [2021-06-12 22:23:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:13,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:13,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:13,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-12 22:23:13,959 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:13,959 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 28 times [2021-06-12 22:23:13,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:13,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653259693] [2021-06-12 22:23:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:14,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:14,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653259693] [2021-06-12 22:23:14,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653259693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:14,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093970978] [2021-06-12 22:23:14,179 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 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 [2021-06-12 22:23:14,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:23:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:14,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:14,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-12 22:23:14,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:14,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:14,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:14,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-12 22:23:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:14,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093970978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:14,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:14,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:14,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469986314] [2021-06-12 22:23:14,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:14,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:14,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:14,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:14,421 INFO L87 Difference]: Start difference. First operand 1355 states and 4582 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:15,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:15,234 INFO L93 Difference]: Finished difference Result 2043 states and 6705 transitions. [2021-06-12 22:23:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:23:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-12 22:23:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:15,237 INFO L225 Difference]: With dead ends: 2043 [2021-06-12 22:23:15,237 INFO L226 Difference]: Without dead ends: 2024 [2021-06-12 22:23:15,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 754.3ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:23:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-06-12 22:23:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1356. [2021-06-12 22:23:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-12 22:23:15,255 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-12 22:23:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:15,255 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-12 22:23:15,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-12 22:23:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:15,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:15,256 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:15,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:15,457 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 29 times [2021-06-12 22:23:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:15,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594644583] [2021-06-12 22:23:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:15,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:15,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594644583] [2021-06-12 22:23:15,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594644583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:15,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801416115] [2021-06-12 22:23:15,646 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 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 [2021-06-12 22:23:15,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:23:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:15,855 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:23:15,855 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-12 22:23:15,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:15,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:15,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:15,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-06-12 22:23:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:15,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801416115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:15,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:15,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:23:15,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187829351] [2021-06-12 22:23:15,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:23:15,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:23:15,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:15,910 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 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) [2021-06-12 22:23:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:16,636 INFO L93 Difference]: Finished difference Result 2000 states and 6546 transitions. [2021-06-12 22:23:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:23:16,636 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 26 [2021-06-12 22:23:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:16,639 INFO L225 Difference]: With dead ends: 2000 [2021-06-12 22:23:16,639 INFO L226 Difference]: Without dead ends: 1950 [2021-06-12 22:23:16,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:23:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-06-12 22:23:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1356. [2021-06-12 22:23:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-06-12 22:23:16,655 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-06-12 22:23:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:16,655 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-06-12 22:23:16,655 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) [2021-06-12 22:23:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-06-12 22:23:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:16,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:16,657 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:16,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 22:23:16,857 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-06-12 22:23:16,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:16,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804263066] [2021-06-12 22:23:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:17,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:17,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804263066] [2021-06-12 22:23:17,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804263066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:17,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655917968] [2021-06-12 22:23:17,213 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 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 [2021-06-12 22:23:17,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:23:17,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:17,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:23:17,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:17,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:17,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:17,451 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 21 treesize of output 11 [2021-06-12 22:23:17,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:17,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:17,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:17,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:23:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:17,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655917968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:17,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:17,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:23:17,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844922565] [2021-06-12 22:23:17,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:23:17,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:23:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:17,473 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-06-12 22:23:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:18,270 INFO L93 Difference]: Finished difference Result 1907 states and 6150 transitions. [2021-06-12 22:23:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:23:18,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 26 [2021-06-12 22:23:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:18,272 INFO L225 Difference]: With dead ends: 1907 [2021-06-12 22:23:18,273 INFO L226 Difference]: Without dead ends: 1855 [2021-06-12 22:23:18,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1024.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:23:18,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-06-12 22:23:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1390. [2021-06-12 22:23:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.375809935205184) internal successors, (4689), 1389 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4689 transitions. [2021-06-12 22:23:18,290 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4689 transitions. Word has length 26 [2021-06-12 22:23:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:18,290 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4689 transitions. [2021-06-12 22:23:18,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2021-06-12 22:23:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4689 transitions. [2021-06-12 22:23:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:18,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:18,292 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:18,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 22:23:18,509 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-06-12 22:23:18,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:18,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146872675] [2021-06-12 22:23:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:18,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:18,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146872675] [2021-06-12 22:23:18,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146872675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:18,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558064293] [2021-06-12 22:23:18,764 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 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 [2021-06-12 22:23:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:18,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:23:18,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:18,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:18,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:18,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 22:23:18,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:18,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:18,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:18,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:23:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:18,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558064293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:18,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:18,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:23:18,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335213718] [2021-06-12 22:23:18,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:18,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:18,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:18,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:18,950 INFO L87 Difference]: Start difference. First operand 1390 states and 4689 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:23:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:20,012 INFO L93 Difference]: Finished difference Result 1968 states and 6459 transitions. [2021-06-12 22:23:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:23:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-12 22:23:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:20,015 INFO L225 Difference]: With dead ends: 1968 [2021-06-12 22:23:20,016 INFO L226 Difference]: Without dead ends: 1953 [2021-06-12 22:23:20,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1012.4ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:23:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-12 22:23:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-06-12 22:23:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3707945597709377) internal successors, (4709), 1397 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4709 transitions. [2021-06-12 22:23:20,033 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4709 transitions. Word has length 26 [2021-06-12 22:23:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:20,034 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4709 transitions. [2021-06-12 22:23:20,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:23:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4709 transitions. [2021-06-12 22:23:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:20,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:20,035 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:20,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 22:23:20,236 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:20,236 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 30 times [2021-06-12 22:23:20,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:20,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549099833] [2021-06-12 22:23:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:20,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549099833] [2021-06-12 22:23:20,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549099833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:20,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661479440] [2021-06-12 22:23:20,448 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 [2021-06-12 22:23:20,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:23:20,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:20,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:20,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:20,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 22:23:20,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:20,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:20,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:20,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:98 [2021-06-12 22:23:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661479440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:20,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:20,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:23:20,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802024115] [2021-06-12 22:23:20,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:23:20,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:23:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:20,850 INFO L87 Difference]: Start difference. First operand 1398 states and 4709 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 22:23:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:23,300 INFO L93 Difference]: Finished difference Result 2366 states and 7465 transitions. [2021-06-12 22:23:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:23,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:23,303 INFO L225 Difference]: With dead ends: 2366 [2021-06-12 22:23:23,303 INFO L226 Difference]: Without dead ends: 2332 [2021-06-12 22:23:23,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2204.0ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:23:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-12 22:23:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1421. [2021-06-12 22:23:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3816901408450706) internal successors, (4802), 1420 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4802 transitions. [2021-06-12 22:23:23,324 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4802 transitions. Word has length 26 [2021-06-12 22:23:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:23,324 INFO L482 AbstractCegarLoop]: Abstraction has 1421 states and 4802 transitions. [2021-06-12 22:23:23,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 22:23:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4802 transitions. [2021-06-12 22:23:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:23,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:23,325 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:23,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:23,526 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-06-12 22:23:23,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:23,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694221690] [2021-06-12 22:23:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:23,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694221690] [2021-06-12 22:23:23,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694221690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:23,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789282154] [2021-06-12 22:23:23,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:23,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:23,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:23,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:23:23,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:24,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:24,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:24,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:24,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:24,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 22:23:24,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:24,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:24,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:24,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-12 22:23:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:24,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789282154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:24,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:24,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:23:24,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908144985] [2021-06-12 22:23:24,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:23:24,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:24,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:23:24,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:23:24,140 INFO L87 Difference]: Start difference. First operand 1421 states and 4802 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:26,679 INFO L93 Difference]: Finished difference Result 2286 states and 7249 transitions. [2021-06-12 22:23:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:23:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:26,683 INFO L225 Difference]: With dead ends: 2286 [2021-06-12 22:23:26,683 INFO L226 Difference]: Without dead ends: 2249 [2021-06-12 22:23:26,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2269.5ms TimeCoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:23:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-06-12 22:23:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1440. [2021-06-12 22:23:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.3794301598332175) internal successors, (4863), 1439 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4863 transitions. [2021-06-12 22:23:26,702 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4863 transitions. Word has length 26 [2021-06-12 22:23:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:26,703 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 4863 transitions. [2021-06-12 22:23:26,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4863 transitions. [2021-06-12 22:23:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:26,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:26,704 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:26,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 22:23:26,905 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:26,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 31 times [2021-06-12 22:23:26,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:26,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738002356] [2021-06-12 22:23:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:27,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738002356] [2021-06-12 22:23:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738002356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245505612] [2021-06-12 22:23:27,100 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 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 [2021-06-12 22:23:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:27,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:23:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:23:27,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:27,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:27,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:27,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:23:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:27,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245505612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:27,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:27,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602434478] [2021-06-12 22:23:27,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:27,318 INFO L87 Difference]: Start difference. First operand 1440 states and 4863 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:23:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:28,180 INFO L93 Difference]: Finished difference Result 2060 states and 6655 transitions. [2021-06-12 22:23:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:23:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 22:23:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:28,183 INFO L225 Difference]: With dead ends: 2060 [2021-06-12 22:23:28,183 INFO L226 Difference]: Without dead ends: 2045 [2021-06-12 22:23:28,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 811.4ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:23:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-12 22:23:28,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1446. [2021-06-12 22:23:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.382006920415225) internal successors, (4887), 1445 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4887 transitions. [2021-06-12 22:23:28,200 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4887 transitions. Word has length 26 [2021-06-12 22:23:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:28,201 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4887 transitions. [2021-06-12 22:23:28,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:23:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4887 transitions. [2021-06-12 22:23:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:28,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:28,202 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:28,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:28,403 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 32 times [2021-06-12 22:23:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:28,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574175219] [2021-06-12 22:23:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:28,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:28,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574175219] [2021-06-12 22:23:28,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574175219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:28,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730128210] [2021-06-12 22:23:28,586 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 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 [2021-06-12 22:23:28,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:28,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:28,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-12 22:23:28,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:28,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:28,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 22:23:28,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:312 [2021-06-12 22:23:29,085 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-12 22:23:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730128210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:29,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:29,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 22:23:29,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670312982] [2021-06-12 22:23:29,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:29,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:29,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:29,270 INFO L87 Difference]: Start difference. First operand 1446 states and 4887 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:23:29,409 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2021-06-12 22:23:30,392 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-12 22:23:30,546 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2021-06-12 22:23:30,692 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-12 22:23:31,040 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-12 22:23:31,234 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-06-12 22:23:31,879 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-12 22:23:32,072 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2021-06-12 22:23:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:32,148 INFO L93 Difference]: Finished difference Result 2667 states and 8418 transitions. [2021-06-12 22:23:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:23:32,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 22:23:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:32,151 INFO L225 Difference]: With dead ends: 2667 [2021-06-12 22:23:32,152 INFO L226 Difference]: Without dead ends: 2629 [2021-06-12 22:23:32,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2831.8ms TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:23:32,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-12 22:23:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1442. [2021-06-12 22:23:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3809854267869537) internal successors, (4872), 1441 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:32,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4872 transitions. [2021-06-12 22:23:32,173 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4872 transitions. Word has length 26 [2021-06-12 22:23:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:32,173 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4872 transitions. [2021-06-12 22:23:32,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:23:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4872 transitions. [2021-06-12 22:23:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:32,175 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:32,175 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:32,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 22:23:32,375 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 45 times [2021-06-12 22:23:32,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:32,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453722243] [2021-06-12 22:23:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:32,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453722243] [2021-06-12 22:23:32,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453722243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:32,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718295338] [2021-06-12 22:23:32,604 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 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 [2021-06-12 22:23:32,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:23:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:32,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:23:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:32,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-12 22:23:32,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:32,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:32,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:32,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-06-12 22:23:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:32,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718295338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:32,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:32,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:23:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148176867] [2021-06-12 22:23:32,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:23:32,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:32,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:23:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:23:32,928 INFO L87 Difference]: Start difference. First operand 1442 states and 4872 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) [2021-06-12 22:23:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:34,389 INFO L93 Difference]: Finished difference Result 2363 states and 7703 transitions. [2021-06-12 22:23:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:23:34,389 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 26 [2021-06-12 22:23:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:34,392 INFO L225 Difference]: With dead ends: 2363 [2021-06-12 22:23:34,392 INFO L226 Difference]: Without dead ends: 2348 [2021-06-12 22:23:34,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1356.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:23:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-12 22:23:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1449. [2021-06-12 22:23:34,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.382596685082873) internal successors, (4898), 1448 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4898 transitions. [2021-06-12 22:23:34,416 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4898 transitions. Word has length 26 [2021-06-12 22:23:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:34,416 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4898 transitions. [2021-06-12 22:23:34,417 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) [2021-06-12 22:23:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4898 transitions. [2021-06-12 22:23:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:34,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:34,419 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:34,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:34,637 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:34,637 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 46 times [2021-06-12 22:23:34,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:34,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118733812] [2021-06-12 22:23:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:34,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:34,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118733812] [2021-06-12 22:23:34,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118733812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:34,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363011160] [2021-06-12 22:23:34,884 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 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 [2021-06-12 22:23:34,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:34,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:35,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:35,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:35,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:35,047 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 21 treesize of output 39 [2021-06-12 22:23:35,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:35,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:35,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:35,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-12 22:23:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:35,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363011160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:35,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:35,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 22:23:35,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626071410] [2021-06-12 22:23:35,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:35,130 INFO L87 Difference]: Start difference. First operand 1449 states and 4898 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:23:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:37,158 INFO L93 Difference]: Finished difference Result 3450 states and 10856 transitions. [2021-06-12 22:23:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:23:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-12 22:23:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:37,163 INFO L225 Difference]: With dead ends: 3450 [2021-06-12 22:23:37,163 INFO L226 Difference]: Without dead ends: 3393 [2021-06-12 22:23:37,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1808.0ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:23:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-06-12 22:23:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 1615. [2021-06-12 22:23:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.4052044609665426) internal successors, (5496), 1614 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5496 transitions. [2021-06-12 22:23:37,201 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5496 transitions. Word has length 26 [2021-06-12 22:23:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:37,201 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5496 transitions. [2021-06-12 22:23:37,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:23:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5496 transitions. [2021-06-12 22:23:37,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:37,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:37,203 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:37,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 22:23:37,417 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 33 times [2021-06-12 22:23:37,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:37,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614776591] [2021-06-12 22:23:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:37,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:37,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614776591] [2021-06-12 22:23:37,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614776591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:37,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31736179] [2021-06-12 22:23:37,617 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 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 [2021-06-12 22:23:37,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:23:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:23:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:37,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:37,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-12 22:23:37,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:37,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:37,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:37,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:75 [2021-06-12 22:23:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:37,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31736179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:37,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:37,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 22:23:37,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090471837] [2021-06-12 22:23:37,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:37,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:37,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:37,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:37,919 INFO L87 Difference]: Start difference. First operand 1615 states and 5496 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:23:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:39,534 INFO L93 Difference]: Finished difference Result 2210 states and 7258 transitions. [2021-06-12 22:23:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:23:39,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 22:23:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:39,537 INFO L225 Difference]: With dead ends: 2210 [2021-06-12 22:23:39,537 INFO L226 Difference]: Without dead ends: 2180 [2021-06-12 22:23:39,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1296.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:23:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-12 22:23:39,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1620. [2021-06-12 22:23:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4021000617665225) internal successors, (5508), 1619 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5508 transitions. [2021-06-12 22:23:39,556 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5508 transitions. Word has length 26 [2021-06-12 22:23:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:39,556 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5508 transitions. [2021-06-12 22:23:39,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:23:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5508 transitions. [2021-06-12 22:23:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:39,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:39,558 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:39,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:39,759 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:39,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 34 times [2021-06-12 22:23:39,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:39,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190965534] [2021-06-12 22:23:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:39,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190965534] [2021-06-12 22:23:39,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190965534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086042487] [2021-06-12 22:23:39,930 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 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 [2021-06-12 22:23:39,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:39,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:23:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:40,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:40,080 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 20 treesize of output 20 [2021-06-12 22:23:40,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:40,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:40,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:40,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-12 22:23:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:40,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086042487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:40,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:40,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:23:40,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824772678] [2021-06-12 22:23:40,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:40,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:40,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:40,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:40,132 INFO L87 Difference]: Start difference. First operand 1620 states and 5508 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:40,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:40,840 INFO L93 Difference]: Finished difference Result 2187 states and 7261 transitions. [2021-06-12 22:23:40,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:23:40,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-12 22:23:40,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:40,844 INFO L225 Difference]: With dead ends: 2187 [2021-06-12 22:23:40,844 INFO L226 Difference]: Without dead ends: 2162 [2021-06-12 22:23:40,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:23:40,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-06-12 22:23:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1623. [2021-06-12 22:23:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.401356350184957) internal successors, (5517), 1622 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5517 transitions. [2021-06-12 22:23:40,863 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5517 transitions. Word has length 26 [2021-06-12 22:23:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:40,863 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5517 transitions. [2021-06-12 22:23:40,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:23:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5517 transitions. [2021-06-12 22:23:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:40,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:40,865 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:41,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:41,067 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:41,067 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 35 times [2021-06-12 22:23:41,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:41,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442905340] [2021-06-12 22:23:41,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:41,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442905340] [2021-06-12 22:23:41,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442905340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649208919] [2021-06-12 22:23:41,241 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 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 [2021-06-12 22:23:41,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:23:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:23:41,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:41,466 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:23:41,466 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 56 [2021-06-12 22:23:41,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:41,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:41,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:41,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:19 [2021-06-12 22:23:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:41,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649208919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:41,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:41,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:23:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872223034] [2021-06-12 22:23:41,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:23:41,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:23:41,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:41,535 INFO L87 Difference]: Start difference. First operand 1623 states and 5517 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:42,909 INFO L93 Difference]: Finished difference Result 2464 states and 8030 transitions. [2021-06-12 22:23:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:23:42,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:42,913 INFO L225 Difference]: With dead ends: 2464 [2021-06-12 22:23:42,913 INFO L226 Difference]: Without dead ends: 2430 [2021-06-12 22:23:42,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1185.7ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:23:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-06-12 22:23:42,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1617. [2021-06-12 22:23:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.3991336633663365) internal successors, (5493), 1616 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5493 transitions. [2021-06-12 22:23:42,944 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5493 transitions. Word has length 26 [2021-06-12 22:23:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:42,944 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 5493 transitions. [2021-06-12 22:23:42,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5493 transitions. [2021-06-12 22:23:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:42,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:42,946 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:43,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:43,149 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 47 times [2021-06-12 22:23:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:43,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955557558] [2021-06-12 22:23:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:43,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955557558] [2021-06-12 22:23:43,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955557558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495659980] [2021-06-12 22:23:43,443 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 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 [2021-06-12 22:23:43,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:23:43,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:23:43,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:43,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:43,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:43,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:43,611 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 21 treesize of output 11 [2021-06-12 22:23:43,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:43,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:43,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:43,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:23:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:43,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495659980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:43,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:43,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:23:43,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695981266] [2021-06-12 22:23:43,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:23:43,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:23:43,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:23:43,638 INFO L87 Difference]: Start difference. First operand 1617 states and 5493 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:23:44,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:44,838 INFO L93 Difference]: Finished difference Result 2080 states and 6843 transitions. [2021-06-12 22:23:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:23:44,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-12 22:23:44,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:44,841 INFO L225 Difference]: With dead ends: 2080 [2021-06-12 22:23:44,841 INFO L226 Difference]: Without dead ends: 2058 [2021-06-12 22:23:44,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1121.8ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:23:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-12 22:23:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1607. [2021-06-12 22:23:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-12 22:23:44,860 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-12 22:23:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:44,860 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-12 22:23:44,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:23:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-12 22:23:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:44,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:44,862 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:45,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:45,063 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 48 times [2021-06-12 22:23:45,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:45,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664710414] [2021-06-12 22:23:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:45,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:45,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664710414] [2021-06-12 22:23:45,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664710414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:45,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264353740] [2021-06-12 22:23:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:23:45,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:23:45,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:45,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:45,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:45,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:45,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 22:23:45,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:45,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:45,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:45,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-12 22:23:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:45,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264353740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:45,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:45,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:23:45,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444629582] [2021-06-12 22:23:45,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:45,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:45,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:45,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:45,651 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-12 22:23:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:47,223 INFO L93 Difference]: Finished difference Result 2207 states and 7294 transitions. [2021-06-12 22:23:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:23:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:47,226 INFO L225 Difference]: With dead ends: 2207 [2021-06-12 22:23:47,226 INFO L226 Difference]: Without dead ends: 2192 [2021-06-12 22:23:47,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1610.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:23:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-12 22:23:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1607. [2021-06-12 22:23:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-06-12 22:23:47,258 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-06-12 22:23:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:47,258 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-06-12 22:23:47,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-12 22:23:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-06-12 22:23:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:47,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:47,261 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:47,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 22:23:47,462 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 49 times [2021-06-12 22:23:47,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:47,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532976301] [2021-06-12 22:23:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:47,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:47,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532976301] [2021-06-12 22:23:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532976301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:47,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558851719] [2021-06-12 22:23:47,724 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 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 [2021-06-12 22:23:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:47,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:47,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:47,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:47,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:47,884 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 21 treesize of output 11 [2021-06-12 22:23:47,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:47,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:47,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:47,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:23:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:47,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558851719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:47,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:47,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 22:23:47,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144570056] [2021-06-12 22:23:47,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:47,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:47,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:47,912 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:23:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:49,536 INFO L93 Difference]: Finished difference Result 2722 states and 8796 transitions. [2021-06-12 22:23:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:23:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-12 22:23:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:49,539 INFO L225 Difference]: With dead ends: 2722 [2021-06-12 22:23:49,540 INFO L226 Difference]: Without dead ends: 2686 [2021-06-12 22:23:49,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1440.8ms TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:23:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-12 22:23:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1677. [2021-06-12 22:23:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.389021479713604) internal successors, (5680), 1676 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5680 transitions. [2021-06-12 22:23:49,563 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5680 transitions. Word has length 26 [2021-06-12 22:23:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:49,563 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5680 transitions. [2021-06-12 22:23:49,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-06-12 22:23:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5680 transitions. [2021-06-12 22:23:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:49,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:49,565 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:49,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 22:23:49,766 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-06-12 22:23:49,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:49,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479038582] [2021-06-12 22:23:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:50,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:50,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479038582] [2021-06-12 22:23:50,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479038582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:50,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688748936] [2021-06-12 22:23:50,017 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 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 [2021-06-12 22:23:50,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:50,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:23:50,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:50,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:50,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-12 22:23:50,186 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:23:50,200 INFO L628 ElimStorePlain]: treesize reduction 20, result has 47.4 percent of original size [2021-06-12 22:23:50,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:50,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-06-12 22:23:50,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:50,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688748936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:50,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:50,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-12 22:23:50,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928183548] [2021-06-12 22:23:50,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:23:50,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:50,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:23:50,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:50,247 INFO L87 Difference]: Start difference. First operand 1677 states and 5680 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-12 22:23:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:54,356 INFO L93 Difference]: Finished difference Result 3350 states and 10511 transitions. [2021-06-12 22:23:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 22:23:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:54,361 INFO L225 Difference]: With dead ends: 3350 [2021-06-12 22:23:54,361 INFO L226 Difference]: Without dead ends: 3286 [2021-06-12 22:23:54,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 3609.8ms TimeCoverageRelationStatistics Valid=1163, Invalid=5317, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 22:23:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-12 22:23:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1694. [2021-06-12 22:23:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.375073833431778) internal successors, (5714), 1693 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5714 transitions. [2021-06-12 22:23:54,388 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5714 transitions. Word has length 26 [2021-06-12 22:23:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:54,388 INFO L482 AbstractCegarLoop]: Abstraction has 1694 states and 5714 transitions. [2021-06-12 22:23:54,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-12 22:23:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5714 transitions. [2021-06-12 22:23:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:54,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:54,390 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:54,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 22:23:54,591 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-06-12 22:23:54,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:54,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800435969] [2021-06-12 22:23:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:54,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:54,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800435969] [2021-06-12 22:23:54,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800435969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:54,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075274007] [2021-06-12 22:23:54,911 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 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 [2021-06-12 22:23:54,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:23:54,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:54,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:23:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:55,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:55,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-06-12 22:23:55,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:23:55,333 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-06-12 22:23:55,333 INFO L628 ElimStorePlain]: treesize reduction 81, result has 51.5 percent of original size [2021-06-12 22:23:55,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:55,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:273 [2021-06-12 22:23:55,503 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-12 22:23:55,677 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-12 22:23:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:55,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075274007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:55,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:55,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 22:23:55,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175773372] [2021-06-12 22:23:55,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:23:55,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:23:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:23:55,759 INFO L87 Difference]: Start difference. First operand 1694 states and 5714 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:56,732 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-12 22:23:57,124 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-12 22:23:57,390 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-12 22:23:57,775 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-06-12 22:23:58,455 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-12 22:23:58,647 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-06-12 22:23:58,795 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-12 22:23:58,971 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-06-12 22:23:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:59,058 INFO L93 Difference]: Finished difference Result 2842 states and 9155 transitions. [2021-06-12 22:23:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:23:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:23:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:59,062 INFO L225 Difference]: With dead ends: 2842 [2021-06-12 22:23:59,062 INFO L226 Difference]: Without dead ends: 2797 [2021-06-12 22:23:59,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3367.1ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:23:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-12 22:23:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1705. [2021-06-12 22:23:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.380868544600939) internal successors, (5761), 1704 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5761 transitions. [2021-06-12 22:23:59,085 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5761 transitions. Word has length 26 [2021-06-12 22:23:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:59,085 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5761 transitions. [2021-06-12 22:23:59,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5761 transitions. [2021-06-12 22:23:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:23:59,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:59,088 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:59,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:59,289 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-06-12 22:23:59,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:59,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819832166] [2021-06-12 22:23:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:59,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:59,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819832166] [2021-06-12 22:23:59,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819832166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586529366] [2021-06-12 22:23:59,533 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 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 [2021-06-12 22:23:59,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:59,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:59,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:23:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:59,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:59,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:23:59,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-12 22:23:59,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:59,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:59,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:59,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:10 [2021-06-12 22:23:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:59,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586529366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:59,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:59,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:23:59,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430958496] [2021-06-12 22:23:59,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:59,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:59,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:59,745 INFO L87 Difference]: Start difference. First operand 1705 states and 5761 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:24:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:01,302 INFO L93 Difference]: Finished difference Result 2158 states and 7106 transitions. [2021-06-12 22:24:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:24:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-12 22:24:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:01,306 INFO L225 Difference]: With dead ends: 2158 [2021-06-12 22:24:01,306 INFO L226 Difference]: Without dead ends: 2143 [2021-06-12 22:24:01,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1468.1ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:24:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-12 22:24:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1709. [2021-06-12 22:24:01,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-12 22:24:01,334 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-12 22:24:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:01,335 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-12 22:24:01,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:24:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-12 22:24:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:01,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:01,337 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:01,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 22:24:01,537 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:01,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-06-12 22:24:01,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:01,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011882691] [2021-06-12 22:24:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:01,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011882691] [2021-06-12 22:24:01,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011882691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:01,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232731473] [2021-06-12 22:24:01,804 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 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 [2021-06-12 22:24:01,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:24:01,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:24:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:02,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:02,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-06-12 22:24:02,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:02,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:02,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:02,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-12 22:24:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:02,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232731473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:02,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:02,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:24:02,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962985202] [2021-06-12 22:24:02,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:24:02,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:02,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:24:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:24:02,117 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:03,452 INFO L93 Difference]: Finished difference Result 2441 states and 8075 transitions. [2021-06-12 22:24:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:24:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:03,456 INFO L225 Difference]: With dead ends: 2441 [2021-06-12 22:24:03,456 INFO L226 Difference]: Without dead ends: 2426 [2021-06-12 22:24:03,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1127.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-12 22:24:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1709. [2021-06-12 22:24:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-06-12 22:24:03,480 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-06-12 22:24:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:03,480 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-06-12 22:24:03,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-06-12 22:24:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:03,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:03,482 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:03,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-12 22:24:03,683 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:03,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:03,683 INFO L82 PathProgramCache]: Analyzing trace with hash 370367166, now seen corresponding path program 54 times [2021-06-12 22:24:03,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:03,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133839156] [2021-06-12 22:24:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:03,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:03,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133839156] [2021-06-12 22:24:03,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133839156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:03,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858324023] [2021-06-12 22:24:03,947 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 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 [2021-06-12 22:24:03,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:24:03,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:03,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:03,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:04,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:04,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:04,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:04,110 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 21 treesize of output 11 [2021-06-12 22:24:04,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:04,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:04,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:04,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:04,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858324023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:04,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:04,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:24:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687386016] [2021-06-12 22:24:04,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:04,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:04,160 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:24:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:04,988 INFO L93 Difference]: Finished difference Result 2137 states and 7029 transitions. [2021-06-12 22:24:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:24:04,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-12 22:24:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:04,991 INFO L225 Difference]: With dead ends: 2137 [2021-06-12 22:24:04,992 INFO L226 Difference]: Without dead ends: 2118 [2021-06-12 22:24:04,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 887.0ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:24:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-06-12 22:24:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1703. [2021-06-12 22:24:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.380728554641598) internal successors, (5754), 1702 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5754 transitions. [2021-06-12 22:24:05,015 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5754 transitions. Word has length 26 [2021-06-12 22:24:05,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:05,015 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5754 transitions. [2021-06-12 22:24:05,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:24:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5754 transitions. [2021-06-12 22:24:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:05,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:05,017 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:05,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:05,218 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:05,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:05,218 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-06-12 22:24:05,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:05,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549182231] [2021-06-12 22:24:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:05,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:05,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549182231] [2021-06-12 22:24:05,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549182231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:05,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336071002] [2021-06-12 22:24:05,517 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:05,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:05,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:05,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:05,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:05,649 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 21 treesize of output 37 [2021-06-12 22:24:05,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:05,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:05,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:05,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-06-12 22:24:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:05,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336071002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:05,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:05,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:24:05,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586162030] [2021-06-12 22:24:05,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:24:05,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:05,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:24:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:24:05,702 INFO L87 Difference]: Start difference. First operand 1703 states and 5754 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:07,764 INFO L93 Difference]: Finished difference Result 2951 states and 9376 transitions. [2021-06-12 22:24:07,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:24:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:07,769 INFO L225 Difference]: With dead ends: 2951 [2021-06-12 22:24:07,769 INFO L226 Difference]: Without dead ends: 2932 [2021-06-12 22:24:07,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1859.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:24:07,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-12 22:24:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1697. [2021-06-12 22:24:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3767688679245285) internal successors, (5727), 1696 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5727 transitions. [2021-06-12 22:24:07,793 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5727 transitions. Word has length 26 [2021-06-12 22:24:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:07,794 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5727 transitions. [2021-06-12 22:24:07,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5727 transitions. [2021-06-12 22:24:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:07,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:07,796 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:07,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:07,996 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:07,996 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 36 times [2021-06-12 22:24:07,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:07,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042413184] [2021-06-12 22:24:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:08,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:08,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042413184] [2021-06-12 22:24:08,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042413184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:08,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831872213] [2021-06-12 22:24:08,135 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:08,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:08,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:24:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:08,338 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:24:08,339 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-12 22:24:08,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:08,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:08,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:08,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:49 [2021-06-12 22:24:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:08,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831872213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:08,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:08,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:24:08,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842440713] [2021-06-12 22:24:08,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:08,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:08,397 INFO L87 Difference]: Start difference. First operand 1697 states and 5727 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 22:24:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:09,814 INFO L93 Difference]: Finished difference Result 2361 states and 7668 transitions. [2021-06-12 22:24:09,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:24:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:09,817 INFO L225 Difference]: With dead ends: 2361 [2021-06-12 22:24:09,817 INFO L226 Difference]: Without dead ends: 2331 [2021-06-12 22:24:09,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1059.0ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:24:09,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-12 22:24:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1708. [2021-06-12 22:24:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.3807850029291155) internal successors, (5771), 1707 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5771 transitions. [2021-06-12 22:24:09,842 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5771 transitions. Word has length 26 [2021-06-12 22:24:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:09,842 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5771 transitions. [2021-06-12 22:24:09,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-06-12 22:24:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5771 transitions. [2021-06-12 22:24:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:09,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:09,845 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:10,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-12 22:24:10,067 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:10,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 37 times [2021-06-12 22:24:10,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:10,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716129850] [2021-06-12 22:24:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:10,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:10,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716129850] [2021-06-12 22:24:10,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716129850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:10,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087279567] [2021-06-12 22:24:10,203 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:10,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:10,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:10,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:10,405 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 31 [2021-06-12 22:24:10,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:10,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:10,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:10,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-12 22:24:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:10,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087279567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:10,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:10,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:10,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912702327] [2021-06-12 22:24:10,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:10,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:10,469 INFO L87 Difference]: Start difference. First operand 1708 states and 5771 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-06-12 22:24:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:11,465 INFO L93 Difference]: Finished difference Result 2199 states and 7281 transitions. [2021-06-12 22:24:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:24:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-12 22:24:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:11,468 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 22:24:11,468 INFO L226 Difference]: Without dead ends: 2184 [2021-06-12 22:24:11,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:24:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-12 22:24:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1697. [2021-06-12 22:24:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3838443396226414) internal successors, (5739), 1696 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5739 transitions. [2021-06-12 22:24:11,487 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5739 transitions. Word has length 26 [2021-06-12 22:24:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:11,487 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5739 transitions. [2021-06-12 22:24:11,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-06-12 22:24:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5739 transitions. [2021-06-12 22:24:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:11,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:11,489 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:11,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:11,693 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 38 times [2021-06-12 22:24:11,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:11,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563955449] [2021-06-12 22:24:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:11,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:11,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563955449] [2021-06-12 22:24:11,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563955449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:11,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054745468] [2021-06-12 22:24:11,817 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:11,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:11,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:12,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:12,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:24:12,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:12,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:12,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:12,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-12 22:24:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:12,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054745468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:12,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:12,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:12,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12673918] [2021-06-12 22:24:12,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:12,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:12,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:12,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:12,072 INFO L87 Difference]: Start difference. First operand 1697 states and 5739 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:24:12,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:12,724 INFO L93 Difference]: Finished difference Result 2365 states and 7781 transitions. [2021-06-12 22:24:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:24:12,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-12 22:24:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:12,728 INFO L225 Difference]: With dead ends: 2365 [2021-06-12 22:24:12,728 INFO L226 Difference]: Without dead ends: 2350 [2021-06-12 22:24:12,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:24:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-06-12 22:24:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1689. [2021-06-12 22:24:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 3.382701421800948) internal successors, (5710), 1688 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5710 transitions. [2021-06-12 22:24:12,751 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5710 transitions. Word has length 26 [2021-06-12 22:24:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:12,751 INFO L482 AbstractCegarLoop]: Abstraction has 1689 states and 5710 transitions. [2021-06-12 22:24:12,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-06-12 22:24:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5710 transitions. [2021-06-12 22:24:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:12,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:12,753 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:12,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:12,953 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 39 times [2021-06-12 22:24:12,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:12,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717948694] [2021-06-12 22:24:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:13,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:13,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717948694] [2021-06-12 22:24:13,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717948694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:13,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195942099] [2021-06-12 22:24:13,081 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:13,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:13,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:13,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:24:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:13,250 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:24:13,250 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-12 22:24:13,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:13,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:13,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:13,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-12 22:24:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:13,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195942099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:13,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:13,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:13,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019216389] [2021-06-12 22:24:13,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:13,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:13,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:13,303 INFO L87 Difference]: Start difference. First operand 1689 states and 5710 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:14,038 INFO L93 Difference]: Finished difference Result 2545 states and 8378 transitions. [2021-06-12 22:24:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:24:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-12 22:24:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:14,042 INFO L225 Difference]: With dead ends: 2545 [2021-06-12 22:24:14,042 INFO L226 Difference]: Without dead ends: 2530 [2021-06-12 22:24:14,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 694.9ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:24:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-12 22:24:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1683. [2021-06-12 22:24:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3787158145065397) internal successors, (5683), 1682 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:14,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5683 transitions. [2021-06-12 22:24:14,064 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5683 transitions. Word has length 26 [2021-06-12 22:24:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:14,064 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5683 transitions. [2021-06-12 22:24:14,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5683 transitions. [2021-06-12 22:24:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:14,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:14,067 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:14,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:14,268 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 40 times [2021-06-12 22:24:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:14,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708658821] [2021-06-12 22:24:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:14,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:14,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708658821] [2021-06-12 22:24:14,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708658821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:14,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210675172] [2021-06-12 22:24:14,408 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:14,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:14,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:14,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:14,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:14,613 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-12 22:24:14,614 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-12 22:24:14,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:14,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:14,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:14,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-12 22:24:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:14,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210675172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:14,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:14,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:14,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394904948] [2021-06-12 22:24:14,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:14,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:14,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:14,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:14,636 INFO L87 Difference]: Start difference. First operand 1683 states and 5683 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-12 22:24:15,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:15,300 INFO L93 Difference]: Finished difference Result 2243 states and 7363 transitions. [2021-06-12 22:24:15,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:24:15,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:15,303 INFO L225 Difference]: With dead ends: 2243 [2021-06-12 22:24:15,303 INFO L226 Difference]: Without dead ends: 2218 [2021-06-12 22:24:15,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 604.3ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:24:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-12 22:24:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1692. [2021-06-12 22:24:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.3820224719101124) internal successors, (5719), 1691 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5719 transitions. [2021-06-12 22:24:15,323 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5719 transitions. Word has length 26 [2021-06-12 22:24:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:15,323 INFO L482 AbstractCegarLoop]: Abstraction has 1692 states and 5719 transitions. [2021-06-12 22:24:15,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-12 22:24:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5719 transitions. [2021-06-12 22:24:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:15,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:15,325 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:15,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-12 22:24:15,547 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 41 times [2021-06-12 22:24:15,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:15,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102345140] [2021-06-12 22:24:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:15,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:15,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102345140] [2021-06-12 22:24:15,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102345140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:15,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948476423] [2021-06-12 22:24:15,688 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:15,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:15,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:15,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:15,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-12 22:24:15,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:15,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:15,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:15,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-12 22:24:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:15,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948476423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:15,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:15,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:15,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209407343] [2021-06-12 22:24:15,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:15,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:15,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:15,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:15,932 INFO L87 Difference]: Start difference. First operand 1692 states and 5719 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:16,376 INFO L93 Difference]: Finished difference Result 2410 states and 7909 transitions. [2021-06-12 22:24:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:24:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-12 22:24:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:16,380 INFO L225 Difference]: With dead ends: 2410 [2021-06-12 22:24:16,380 INFO L226 Difference]: Without dead ends: 2385 [2021-06-12 22:24:16,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:24:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-06-12 22:24:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1674. [2021-06-12 22:24:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.3807531380753137) internal successors, (5656), 1673 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5656 transitions. [2021-06-12 22:24:16,409 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5656 transitions. Word has length 26 [2021-06-12 22:24:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:16,409 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5656 transitions. [2021-06-12 22:24:16,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5656 transitions. [2021-06-12 22:24:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:16,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:16,412 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:16,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-12 22:24:16,614 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:16,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 42 times [2021-06-12 22:24:16,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:16,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806319231] [2021-06-12 22:24:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:16,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:16,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806319231] [2021-06-12 22:24:16,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806319231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913083334] [2021-06-12 22:24:16,739 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:16,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:24:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:16,930 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:24:16,930 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-06-12 22:24:16,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:16,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:16,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:16,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:77 [2021-06-12 22:24:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:17,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913083334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:17,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:17,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:24:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218377221] [2021-06-12 22:24:17,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:17,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:17,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:17,059 INFO L87 Difference]: Start difference. First operand 1674 states and 5656 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-12 22:24:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:18,088 INFO L93 Difference]: Finished difference Result 2335 states and 7668 transitions. [2021-06-12 22:24:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:24:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:18,091 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 22:24:18,091 INFO L226 Difference]: Without dead ends: 2310 [2021-06-12 22:24:18,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 767.0ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:24:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-12 22:24:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-06-12 22:24:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.3798916315472605) internal successors, (5614), 1661 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5614 transitions. [2021-06-12 22:24:18,111 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5614 transitions. Word has length 26 [2021-06-12 22:24:18,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:18,111 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5614 transitions. [2021-06-12 22:24:18,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-12 22:24:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5614 transitions. [2021-06-12 22:24:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:18,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:18,113 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:18,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 22:24:18,313 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 43 times [2021-06-12 22:24:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:18,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469057723] [2021-06-12 22:24:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:18,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:18,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469057723] [2021-06-12 22:24:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469057723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:18,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318209734] [2021-06-12 22:24:18,475 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:18,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:18,649 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-12 22:24:18,649 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 55 treesize of output 52 [2021-06-12 22:24:18,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:18,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:18,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:18,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:22 [2021-06-12 22:24:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:18,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318209734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:18,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:18,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:18,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212374445] [2021-06-12 22:24:18,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:18,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:18,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:18,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:18,708 INFO L87 Difference]: Start difference. First operand 1662 states and 5614 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-06-12 22:24:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:19,472 INFO L93 Difference]: Finished difference Result 2261 states and 7456 transitions. [2021-06-12 22:24:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:24:19,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-12 22:24:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:19,475 INFO L225 Difference]: With dead ends: 2261 [2021-06-12 22:24:19,475 INFO L226 Difference]: Without dead ends: 2242 [2021-06-12 22:24:19,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:24:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-12 22:24:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1649. [2021-06-12 22:24:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.3780339805825244) internal successors, (5567), 1648 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5567 transitions. [2021-06-12 22:24:19,497 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5567 transitions. Word has length 26 [2021-06-12 22:24:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:19,497 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5567 transitions. [2021-06-12 22:24:19,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-06-12 22:24:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5567 transitions. [2021-06-12 22:24:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:19,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:19,499 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:19,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:19,700 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:19,700 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 44 times [2021-06-12 22:24:19,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:19,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23518133] [2021-06-12 22:24:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:19,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:19,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23518133] [2021-06-12 22:24:19,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23518133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:19,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014537331] [2021-06-12 22:24:19,822 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:19,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:19,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:19,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:20,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:20,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:20,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:24:20,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:20,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:20,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:20,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:24:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:20,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014537331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:20,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:20,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782011093] [2021-06-12 22:24:20,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:20,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:20,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:20,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:20,061 INFO L87 Difference]: Start difference. First operand 1649 states and 5567 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-12 22:24:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:20,608 INFO L93 Difference]: Finished difference Result 2219 states and 7297 transitions. [2021-06-12 22:24:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:24:20,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:20,612 INFO L225 Difference]: With dead ends: 2219 [2021-06-12 22:24:20,612 INFO L226 Difference]: Without dead ends: 2204 [2021-06-12 22:24:20,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:24:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-12 22:24:20,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1700. [2021-06-12 22:24:20,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.3737492642731017) internal successors, (5732), 1699 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5732 transitions. [2021-06-12 22:24:20,632 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5732 transitions. Word has length 26 [2021-06-12 22:24:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:20,632 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5732 transitions. [2021-06-12 22:24:20,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 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) [2021-06-12 22:24:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5732 transitions. [2021-06-12 22:24:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:20,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:20,634 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:20,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-12 22:24:20,834 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:20,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 45 times [2021-06-12 22:24:20,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:20,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96252139] [2021-06-12 22:24:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:20,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:20,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96252139] [2021-06-12 22:24:20,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96252139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:20,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697075362] [2021-06-12 22:24:20,954 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:20,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:20,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:20,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:20,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:21,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:21,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:21,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20 treesize of output 28 [2021-06-12 22:24:21,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:21,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:21,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:24:21,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-12 22:24:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:21,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697075362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:21,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:21,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:21,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552028066] [2021-06-12 22:24:21,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:21,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:21,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:21,242 INFO L87 Difference]: Start difference. First operand 1700 states and 5732 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:21,695 INFO L93 Difference]: Finished difference Result 2458 states and 8075 transitions. [2021-06-12 22:24:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:24:21,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-12 22:24:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:21,699 INFO L225 Difference]: With dead ends: 2458 [2021-06-12 22:24:21,699 INFO L226 Difference]: Without dead ends: 2443 [2021-06-12 22:24:21,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:24:21,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-12 22:24:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1695. [2021-06-12 22:24:21,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.374852420306966) internal successors, (5717), 1694 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5717 transitions. [2021-06-12 22:24:21,720 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5717 transitions. Word has length 26 [2021-06-12 22:24:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:21,720 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5717 transitions. [2021-06-12 22:24:21,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5717 transitions. [2021-06-12 22:24:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:21,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:21,722 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:21,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:21,923 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:21,923 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 46 times [2021-06-12 22:24:21,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:21,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393813980] [2021-06-12 22:24:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:22,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393813980] [2021-06-12 22:24:22,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393813980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786108021] [2021-06-12 22:24:22,047 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:22,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:22,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:22,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:22,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:22,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:24:22,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:22,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:22,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:22,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-12 22:24:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:22,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786108021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:22,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:22,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:22,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839137190] [2021-06-12 22:24:22,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:22,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:22,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:22,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:22,307 INFO L87 Difference]: Start difference. First operand 1695 states and 5717 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:22,749 INFO L93 Difference]: Finished difference Result 2251 states and 7431 transitions. [2021-06-12 22:24:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:24:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:22,752 INFO L225 Difference]: With dead ends: 2251 [2021-06-12 22:24:22,752 INFO L226 Difference]: Without dead ends: 2236 [2021-06-12 22:24:22,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:24:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-12 22:24:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1698. [2021-06-12 22:24:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.3783146729522686) internal successors, (5733), 1697 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5733 transitions. [2021-06-12 22:24:22,772 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5733 transitions. Word has length 26 [2021-06-12 22:24:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:22,772 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 5733 transitions. [2021-06-12 22:24:22,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5733 transitions. [2021-06-12 22:24:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:22,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:22,774 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:22,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-12 22:24:22,975 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 47 times [2021-06-12 22:24:22,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327346781] [2021-06-12 22:24:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:23,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:23,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327346781] [2021-06-12 22:24:23,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327346781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:23,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503958119] [2021-06-12 22:24:23,087 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:23,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:23,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:23,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:23,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:23,277 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-12 22:24:23,277 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-06-12 22:24:23,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:23,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:23,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:23,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-06-12 22:24:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:23,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503958119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:23,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:23,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:23,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651461979] [2021-06-12 22:24:23,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:23,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:23,304 INFO L87 Difference]: Start difference. First operand 1698 states and 5733 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:23,803 INFO L93 Difference]: Finished difference Result 2287 states and 7544 transitions. [2021-06-12 22:24:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:24:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:23,806 INFO L225 Difference]: With dead ends: 2287 [2021-06-12 22:24:23,806 INFO L226 Difference]: Without dead ends: 2272 [2021-06-12 22:24:23,806 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:24:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-12 22:24:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1716. [2021-06-12 22:24:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.3743440233236153) internal successors, (5787), 1715 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5787 transitions. [2021-06-12 22:24:23,827 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5787 transitions. Word has length 26 [2021-06-12 22:24:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:23,828 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5787 transitions. [2021-06-12 22:24:23,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5787 transitions. [2021-06-12 22:24:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:23,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:23,830 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:24,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 22:24:24,030 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 48 times [2021-06-12 22:24:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:24,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962724425] [2021-06-12 22:24:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:24,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:24,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962724425] [2021-06-12 22:24:24,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962724425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:24,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407683897] [2021-06-12 22:24:24,155 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:24,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:24,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:24,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:24,318 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:24:24,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-12 22:24:24,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:24,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:24,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:24,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-12 22:24:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:24,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407683897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:24,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:24,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:24,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752026442] [2021-06-12 22:24:24,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:24,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:24,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:24,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:24,363 INFO L87 Difference]: Start difference. First operand 1716 states and 5787 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:25,181 INFO L93 Difference]: Finished difference Result 2276 states and 7538 transitions. [2021-06-12 22:24:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:24:25,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:25,184 INFO L225 Difference]: With dead ends: 2276 [2021-06-12 22:24:25,184 INFO L226 Difference]: Without dead ends: 2261 [2021-06-12 22:24:25,185 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 661.9ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:24:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-06-12 22:24:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1734. [2021-06-12 22:24:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3721869590305826) internal successors, (5844), 1733 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5844 transitions. [2021-06-12 22:24:25,205 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5844 transitions. Word has length 26 [2021-06-12 22:24:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:25,205 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5844 transitions. [2021-06-12 22:24:25,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5844 transitions. [2021-06-12 22:24:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:25,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:25,207 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:25,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 22:24:25,409 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 49 times [2021-06-12 22:24:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:25,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808457026] [2021-06-12 22:24:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:25,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:25,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808457026] [2021-06-12 22:24:25,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808457026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:25,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671028584] [2021-06-12 22:24:25,516 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:25,699 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:24:25,699 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-06-12 22:24:25,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:25,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:25,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:24:25,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-06-12 22:24:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:25,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671028584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:25,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:25,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:25,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26593908] [2021-06-12 22:24:25,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:25,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:25,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:25,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:25,807 INFO L87 Difference]: Start difference. First operand 1734 states and 5844 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:26,235 INFO L93 Difference]: Finished difference Result 2329 states and 7683 transitions. [2021-06-12 22:24:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:24:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-12 22:24:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:26,239 INFO L225 Difference]: With dead ends: 2329 [2021-06-12 22:24:26,239 INFO L226 Difference]: Without dead ends: 2304 [2021-06-12 22:24:26,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:24:26,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-12 22:24:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1734. [2021-06-12 22:24:26,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-12 22:24:26,262 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-12 22:24:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:26,263 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-12 22:24:26,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-12 22:24:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:26,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:26,265 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:26,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-12 22:24:26,465 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:26,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 50 times [2021-06-12 22:24:26,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:26,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841650198] [2021-06-12 22:24:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:26,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:26,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841650198] [2021-06-12 22:24:26,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841650198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:26,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492331848] [2021-06-12 22:24:26,579 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:26,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:26,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:26,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:26,751 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:24:26,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-12 22:24:26,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:26,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:26,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:26,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-06-12 22:24:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:26,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492331848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:26,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:26,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:26,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281993315] [2021-06-12 22:24:26,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:26,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:26,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:26,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:26,803 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:27,276 INFO L93 Difference]: Finished difference Result 2281 states and 7556 transitions. [2021-06-12 22:24:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:24:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:27,279 INFO L225 Difference]: With dead ends: 2281 [2021-06-12 22:24:27,279 INFO L226 Difference]: Without dead ends: 2266 [2021-06-12 22:24:27,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:24:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-12 22:24:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1734. [2021-06-12 22:24:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-06-12 22:24:27,300 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-06-12 22:24:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:27,300 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-06-12 22:24:27,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-06-12 22:24:27,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:27,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:27,302 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:27,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:27,502 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:27,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1909155608, now seen corresponding path program 56 times [2021-06-12 22:24:27,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:27,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012781308] [2021-06-12 22:24:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:27,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012781308] [2021-06-12 22:24:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012781308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819922909] [2021-06-12 22:24:27,724 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:27,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:27,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:24:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:27,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:27,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:27,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-06-12 22:24:27,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:27,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:27,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:27,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:15 [2021-06-12 22:24:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819922909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:27,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:27,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:24:27,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511007970] [2021-06-12 22:24:27,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:27,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:27,926 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:24:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:28,448 INFO L93 Difference]: Finished difference Result 2265 states and 7364 transitions. [2021-06-12 22:24:28,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:24:28,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-12 22:24:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:28,451 INFO L225 Difference]: With dead ends: 2265 [2021-06-12 22:24:28,451 INFO L226 Difference]: Without dead ends: 2220 [2021-06-12 22:24:28,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 601.4ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:24:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-12 22:24:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2021-06-12 22:24:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.366647629925757) internal successors, (5895), 1751 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5895 transitions. [2021-06-12 22:24:28,471 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5895 transitions. Word has length 26 [2021-06-12 22:24:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:28,471 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5895 transitions. [2021-06-12 22:24:28,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-06-12 22:24:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5895 transitions. [2021-06-12 22:24:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:28,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:28,473 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:28,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:28,675 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1847280054, now seen corresponding path program 57 times [2021-06-12 22:24:28,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:28,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436097873] [2021-06-12 22:24:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:28,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436097873] [2021-06-12 22:24:28,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436097873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731955107] [2021-06-12 22:24:28,883 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:28,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:24:28,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:28,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:29,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:29,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:29,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:29,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-12 22:24:29,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:29,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:29,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:29,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-12 22:24:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:29,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731955107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:29,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:29,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:29,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688606200] [2021-06-12 22:24:29,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:29,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:29,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:29,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:29,130 INFO L87 Difference]: Start difference. First operand 1752 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:30,620 INFO L93 Difference]: Finished difference Result 2446 states and 7986 transitions. [2021-06-12 22:24:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:24:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:30,624 INFO L225 Difference]: With dead ends: 2446 [2021-06-12 22:24:30,624 INFO L226 Difference]: Without dead ends: 2431 [2021-06-12 22:24:30,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:24:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-06-12 22:24:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1746. [2021-06-12 22:24:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.3650429799426935) internal successors, (5872), 1745 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5872 transitions. [2021-06-12 22:24:30,645 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5872 transitions. Word has length 26 [2021-06-12 22:24:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:30,646 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5872 transitions. [2021-06-12 22:24:30,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5872 transitions. [2021-06-12 22:24:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:30,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:30,648 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:30,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 22:24:30,848 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:30,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:30,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 58 times [2021-06-12 22:24:30,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:30,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601344788] [2021-06-12 22:24:30,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:31,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601344788] [2021-06-12 22:24:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601344788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332811815] [2021-06-12 22:24:31,003 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:31,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:31,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:31,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:31,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:31,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:31,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:31,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:31,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:31,133 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 21 treesize of output 11 [2021-06-12 22:24:31,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:31,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:31,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:31,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:31,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332811815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:31,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:31,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-12 22:24:31,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398519145] [2021-06-12 22:24:31,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:24:31,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:31,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:24:31,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:24:31,155 INFO L87 Difference]: Start difference. First operand 1746 states and 5872 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-06-12 22:24:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:31,533 INFO L93 Difference]: Finished difference Result 2059 states and 6675 transitions. [2021-06-12 22:24:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:24:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 26 [2021-06-12 22:24:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:31,536 INFO L225 Difference]: With dead ends: 2059 [2021-06-12 22:24:31,537 INFO L226 Difference]: Without dead ends: 2037 [2021-06-12 22:24:31,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:24:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-06-12 22:24:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1748. [2021-06-12 22:24:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.36519748139668) internal successors, (5879), 1747 states have internal predecessors, (5879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5879 transitions. [2021-06-12 22:24:31,560 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5879 transitions. Word has length 26 [2021-06-12 22:24:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:31,560 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 5879 transitions. [2021-06-12 22:24:31,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-06-12 22:24:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5879 transitions. [2021-06-12 22:24:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:31,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:31,563 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:31,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:31,763 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:31,763 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 59 times [2021-06-12 22:24:31,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:31,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069401697] [2021-06-12 22:24:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:31,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:31,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069401697] [2021-06-12 22:24:31,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069401697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:31,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381038406] [2021-06-12 22:24:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:31,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:31,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:31,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:31,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:32,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:32,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-12 22:24:32,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:32,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:32,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:32,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-06-12 22:24:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:32,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381038406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:32,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:32,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:32,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916808713] [2021-06-12 22:24:32,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:32,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:32,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:32,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:32,184 INFO L87 Difference]: Start difference. First operand 1748 states and 5879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-12 22:24:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:33,143 INFO L93 Difference]: Finished difference Result 2318 states and 7610 transitions. [2021-06-12 22:24:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:24:33,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-12 22:24:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:33,147 INFO L225 Difference]: With dead ends: 2318 [2021-06-12 22:24:33,147 INFO L226 Difference]: Without dead ends: 2276 [2021-06-12 22:24:33,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 835.2ms TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:24:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-12 22:24:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1772. [2021-06-12 22:24:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3585544889892716) internal successors, (5948), 1771 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5948 transitions. [2021-06-12 22:24:33,167 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5948 transitions. Word has length 26 [2021-06-12 22:24:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:33,167 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 5948 transitions. [2021-06-12 22:24:33,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-12 22:24:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5948 transitions. [2021-06-12 22:24:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:33,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:33,169 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:33,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:33,370 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1162419966, now seen corresponding path program 60 times [2021-06-12 22:24:33,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:33,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550422884] [2021-06-12 22:24:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:33,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550422884] [2021-06-12 22:24:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550422884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502482186] [2021-06-12 22:24:33,601 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:33,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:33,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:33,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:33,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:33,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:33,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:33,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:33,754 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 21 treesize of output 11 [2021-06-12 22:24:33,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:33,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:33,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:33,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:33,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502482186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:33,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:33,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-12 22:24:33,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173277675] [2021-06-12 22:24:33,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:24:33,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:33,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:24:33,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:24:33,780 INFO L87 Difference]: Start difference. First operand 1772 states and 5948 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-12 22:24:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:34,330 INFO L93 Difference]: Finished difference Result 2209 states and 7265 transitions. [2021-06-12 22:24:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:24:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-12 22:24:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:34,333 INFO L225 Difference]: With dead ends: 2209 [2021-06-12 22:24:34,334 INFO L226 Difference]: Without dead ends: 2178 [2021-06-12 22:24:34,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:24:34,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-06-12 22:24:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1768. [2021-06-12 22:24:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-12 22:24:34,354 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-12 22:24:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:34,354 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-12 22:24:34,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-12 22:24:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-12 22:24:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:34,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:34,356 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:34,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:34,556 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 61 times [2021-06-12 22:24:34,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:34,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104590673] [2021-06-12 22:24:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:34,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:34,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104590673] [2021-06-12 22:24:34,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104590673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:34,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130794332] [2021-06-12 22:24:34,747 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:34,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:34,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:34,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:34,883 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 21 treesize of output 11 [2021-06-12 22:24:34,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:34,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:34,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:34,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:34,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130794332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:34,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:34,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-12 22:24:34,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130938017] [2021-06-12 22:24:34,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:24:34,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:24:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:24:34,910 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-12 22:24:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:35,275 INFO L93 Difference]: Finished difference Result 2198 states and 7242 transitions. [2021-06-12 22:24:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:24:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-12 22:24:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:35,278 INFO L225 Difference]: With dead ends: 2198 [2021-06-12 22:24:35,278 INFO L226 Difference]: Without dead ends: 2183 [2021-06-12 22:24:35,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:24:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-06-12 22:24:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1768. [2021-06-12 22:24:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-06-12 22:24:35,299 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-06-12 22:24:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:35,299 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-06-12 22:24:35,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2021-06-12 22:24:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-06-12 22:24:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:35,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:35,301 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:35,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-12 22:24:35,503 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 51 times [2021-06-12 22:24:35,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:35,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101224028] [2021-06-12 22:24:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:35,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:35,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101224028] [2021-06-12 22:24:35,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101224028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:35,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109555993] [2021-06-12 22:24:35,725 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:35,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:35,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:35,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:35,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:35,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:24:35,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:35,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:35,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:35,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-12 22:24:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:35,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109555993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:35,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:35,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:24:35,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613598835] [2021-06-12 22:24:35,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:24:35,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:35,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:24:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:24:35,991 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:24:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:36,962 INFO L93 Difference]: Finished difference Result 2386 states and 7756 transitions. [2021-06-12 22:24:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:24:36,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 22:24:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:36,965 INFO L225 Difference]: With dead ends: 2386 [2021-06-12 22:24:36,965 INFO L226 Difference]: Without dead ends: 2371 [2021-06-12 22:24:36,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:24:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-12 22:24:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1779. [2021-06-12 22:24:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.361079865016873) internal successors, (5976), 1778 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 5976 transitions. [2021-06-12 22:24:36,991 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 5976 transitions. Word has length 26 [2021-06-12 22:24:36,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:36,991 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 5976 transitions. [2021-06-12 22:24:36,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:24:36,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 5976 transitions. [2021-06-12 22:24:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:36,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:36,993 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:37,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:37,193 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 62 times [2021-06-12 22:24:37,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:37,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7416410] [2021-06-12 22:24:37,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:37,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:37,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7416410] [2021-06-12 22:24:37,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7416410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:37,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807447394] [2021-06-12 22:24:37,336 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:37,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:37,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:37,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:37,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:37,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 22:24:37,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:37,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:37,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:37,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:37,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807447394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:37,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:37,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:24:37,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025608786] [2021-06-12 22:24:37,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:24:37,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:37,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:24:37,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:24:37,526 INFO L87 Difference]: Start difference. First operand 1779 states and 5976 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:24:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:38,300 INFO L93 Difference]: Finished difference Result 2670 states and 8464 transitions. [2021-06-12 22:24:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:24:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-12 22:24:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:38,304 INFO L225 Difference]: With dead ends: 2670 [2021-06-12 22:24:38,304 INFO L226 Difference]: Without dead ends: 2648 [2021-06-12 22:24:38,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:24:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-12 22:24:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1831. [2021-06-12 22:24:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3666666666666667) internal successors, (6161), 1830 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6161 transitions. [2021-06-12 22:24:38,327 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6161 transitions. Word has length 26 [2021-06-12 22:24:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:38,327 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6161 transitions. [2021-06-12 22:24:38,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:24:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6161 transitions. [2021-06-12 22:24:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:38,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:38,330 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:38,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:38,530 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 52 times [2021-06-12 22:24:38,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:38,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594940437] [2021-06-12 22:24:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:38,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594940437] [2021-06-12 22:24:38,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594940437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458556497] [2021-06-12 22:24:38,701 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:38,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:38,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:38,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:38,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:38,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-12 22:24:38,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:38,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:38,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:38,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-12 22:24:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:38,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458556497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:38,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:38,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:24:38,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569611955] [2021-06-12 22:24:38,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:24:38,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:38,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:24:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:24:38,947 INFO L87 Difference]: Start difference. First operand 1831 states and 6161 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:24:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:40,029 INFO L93 Difference]: Finished difference Result 2547 states and 8275 transitions. [2021-06-12 22:24:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:24:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-12 22:24:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:40,032 INFO L225 Difference]: With dead ends: 2547 [2021-06-12 22:24:40,032 INFO L226 Difference]: Without dead ends: 2532 [2021-06-12 22:24:40,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:24:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-12 22:24:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1836. [2021-06-12 22:24:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.3678474114441417) internal successors, (6180), 1835 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6180 transitions. [2021-06-12 22:24:40,054 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6180 transitions. Word has length 26 [2021-06-12 22:24:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:40,054 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 6180 transitions. [2021-06-12 22:24:40,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2021-06-12 22:24:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6180 transitions. [2021-06-12 22:24:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:40,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:40,056 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:40,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:40,257 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 53 times [2021-06-12 22:24:40,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:40,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201084456] [2021-06-12 22:24:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:40,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:40,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201084456] [2021-06-12 22:24:40,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201084456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:40,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352274543] [2021-06-12 22:24:40,413 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:40,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:40,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:24:40,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:40,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:40,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:40,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-12 22:24:40,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:40,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:40,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:40,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-06-12 22:24:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:40,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352274543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:40,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:40,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:40,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824325660] [2021-06-12 22:24:40,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:40,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:40,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:40,633 INFO L87 Difference]: Start difference. First operand 1836 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-12 22:24:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:41,681 INFO L93 Difference]: Finished difference Result 2824 states and 9165 transitions. [2021-06-12 22:24:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:24:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-12 22:24:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:41,686 INFO L225 Difference]: With dead ends: 2824 [2021-06-12 22:24:41,686 INFO L226 Difference]: Without dead ends: 2809 [2021-06-12 22:24:41,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 839.3ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:24:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-06-12 22:24:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1827. [2021-06-12 22:24:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.3663745892661554) internal successors, (6147), 1826 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6147 transitions. [2021-06-12 22:24:41,715 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6147 transitions. Word has length 26 [2021-06-12 22:24:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:41,715 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6147 transitions. [2021-06-12 22:24:41,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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) [2021-06-12 22:24:41,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6147 transitions. [2021-06-12 22:24:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:41,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:41,717 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:41,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:41,918 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 63 times [2021-06-12 22:24:41,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:41,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247095230] [2021-06-12 22:24:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:42,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:42,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247095230] [2021-06-12 22:24:42,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247095230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:42,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255562750] [2021-06-12 22:24:42,051 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:42,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:24:42,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:42,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:42,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:42,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 22:24:42,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:42,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:42,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:42,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:42,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255562750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:42,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:42,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:24:42,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320522619] [2021-06-12 22:24:42,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:24:42,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:42,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:24:42,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:24:42,218 INFO L87 Difference]: Start difference. First operand 1827 states and 6147 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-12 22:24:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:43,031 INFO L93 Difference]: Finished difference Result 3158 states and 10100 transitions. [2021-06-12 22:24:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:24:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-06-12 22:24:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:43,035 INFO L225 Difference]: With dead ends: 3158 [2021-06-12 22:24:43,035 INFO L226 Difference]: Without dead ends: 3128 [2021-06-12 22:24:43,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:24:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2021-06-12 22:24:43,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 1885. [2021-06-12 22:24:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.3694267515923566) internal successors, (6348), 1884 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6348 transitions. [2021-06-12 22:24:43,062 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6348 transitions. Word has length 26 [2021-06-12 22:24:43,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:43,062 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6348 transitions. [2021-06-12 22:24:43,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-12 22:24:43,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6348 transitions. [2021-06-12 22:24:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:43,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:43,064 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:43,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:43,265 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 64 times [2021-06-12 22:24:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:43,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486615559] [2021-06-12 22:24:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:43,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:43,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486615559] [2021-06-12 22:24:43,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486615559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:43,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813825953] [2021-06-12 22:24:43,433 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:43,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:43,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:43,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:43,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:43,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:43,580 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 21 treesize of output 39 [2021-06-12 22:24:43,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:43,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:43,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:43,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-12 22:24:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:43,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813825953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:43,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:43,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:24:43,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226632395] [2021-06-12 22:24:43,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:24:43,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:43,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:24:43,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:24:43,656 INFO L87 Difference]: Start difference. First operand 1885 states and 6348 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:44,773 INFO L93 Difference]: Finished difference Result 3602 states and 11423 transitions. [2021-06-12 22:24:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:24:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:44,778 INFO L225 Difference]: With dead ends: 3602 [2021-06-12 22:24:44,778 INFO L226 Difference]: Without dead ends: 3558 [2021-06-12 22:24:44,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 994.0ms TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:24:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-06-12 22:24:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1897. [2021-06-12 22:24:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.37289029535865) internal successors, (6395), 1896 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6395 transitions. [2021-06-12 22:24:44,821 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6395 transitions. Word has length 26 [2021-06-12 22:24:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:44,821 INFO L482 AbstractCegarLoop]: Abstraction has 1897 states and 6395 transitions. [2021-06-12 22:24:44,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6395 transitions. [2021-06-12 22:24:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:44,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:44,824 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:45,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 22:24:45,024 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 54 times [2021-06-12 22:24:45,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:45,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858796333] [2021-06-12 22:24:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:45,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:45,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858796333] [2021-06-12 22:24:45,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858796333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:45,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472125620] [2021-06-12 22:24:45,183 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:45,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:45,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:45,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:45,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:45,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:45,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 31 [2021-06-12 22:24:45,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:45,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:45,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:45,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-06-12 22:24:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:45,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472125620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:45,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:45,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:45,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490481533] [2021-06-12 22:24:45,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:45,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:45,380 INFO L87 Difference]: Start difference. First operand 1897 states and 6395 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:46,638 INFO L93 Difference]: Finished difference Result 2547 states and 8408 transitions. [2021-06-12 22:24:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:24:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:46,642 INFO L225 Difference]: With dead ends: 2547 [2021-06-12 22:24:46,642 INFO L226 Difference]: Without dead ends: 2532 [2021-06-12 22:24:46,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 920.1ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:24:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-06-12 22:24:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1907. [2021-06-12 22:24:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 3.3698845750262327) internal successors, (6423), 1906 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 6423 transitions. [2021-06-12 22:24:46,665 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 6423 transitions. Word has length 26 [2021-06-12 22:24:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:46,665 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 6423 transitions. [2021-06-12 22:24:46,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 6423 transitions. [2021-06-12 22:24:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:46,667 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:46,667 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:46,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-06-12 22:24:46,867 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 55 times [2021-06-12 22:24:46,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:46,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978179829] [2021-06-12 22:24:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:46,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978179829] [2021-06-12 22:24:46,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978179829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005346122] [2021-06-12 22:24:46,996 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:47,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:47,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:47,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 22:24:47,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:47,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:47,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:24:47,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-06-12 22:24:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:47,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005346122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:47,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:47,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:24:47,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700880644] [2021-06-12 22:24:47,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:24:47,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:24:47,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:24:47,241 INFO L87 Difference]: Start difference. First operand 1907 states and 6423 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:24:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:48,004 INFO L93 Difference]: Finished difference Result 2690 states and 8822 transitions. [2021-06-12 22:24:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:24:48,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-12 22:24:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:48,008 INFO L225 Difference]: With dead ends: 2690 [2021-06-12 22:24:48,008 INFO L226 Difference]: Without dead ends: 2665 [2021-06-12 22:24:48,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:24:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-12 22:24:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1893. [2021-06-12 22:24:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.374735729386892) internal successors, (6385), 1892 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6385 transitions. [2021-06-12 22:24:48,031 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6385 transitions. Word has length 26 [2021-06-12 22:24:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:48,031 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6385 transitions. [2021-06-12 22:24:48,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-12 22:24:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6385 transitions. [2021-06-12 22:24:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:48,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:48,033 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:48,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:48,235 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 65 times [2021-06-12 22:24:48,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:48,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262948470] [2021-06-12 22:24:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:48,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262948470] [2021-06-12 22:24:48,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262948470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049436549] [2021-06-12 22:24:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:48,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:24:48,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:48,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:48,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:48,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-06-12 22:24:48,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:48,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:48,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:48,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:48,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:48,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049436549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:48,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:48,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:24:48,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552122160] [2021-06-12 22:24:48,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:24:48,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:48,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:24:48,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:24:48,615 INFO L87 Difference]: Start difference. First operand 1893 states and 6385 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:24:49,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:49,510 INFO L93 Difference]: Finished difference Result 2560 states and 8375 transitions. [2021-06-12 22:24:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:24:49,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-12 22:24:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:49,513 INFO L225 Difference]: With dead ends: 2560 [2021-06-12 22:24:49,513 INFO L226 Difference]: Without dead ends: 2538 [2021-06-12 22:24:49,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 853.7ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:24:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-06-12 22:24:49,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1893. [2021-06-12 22:24:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.375264270613108) internal successors, (6386), 1892 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6386 transitions. [2021-06-12 22:24:49,537 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6386 transitions. Word has length 26 [2021-06-12 22:24:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:49,537 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6386 transitions. [2021-06-12 22:24:49,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2021-06-12 22:24:49,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6386 transitions. [2021-06-12 22:24:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:49,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:49,539 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:49,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:49,740 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1778019666, now seen corresponding path program 66 times [2021-06-12 22:24:49,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:49,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364361812] [2021-06-12 22:24:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:49,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:49,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364361812] [2021-06-12 22:24:49,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364361812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:49,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449367863] [2021-06-12 22:24:49,893 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:49,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:24:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:24:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:50,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:50,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:50,113 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 21 treesize of output 37 [2021-06-12 22:24:50,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:50,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:50,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:50,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:26 [2021-06-12 22:24:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:50,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449367863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:50,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:50,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:24:50,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481644692] [2021-06-12 22:24:50,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:50,200 INFO L87 Difference]: Start difference. First operand 1893 states and 6386 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-12 22:24:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:51,947 INFO L93 Difference]: Finished difference Result 3121 states and 9982 transitions. [2021-06-12 22:24:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:24:51,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:51,950 INFO L225 Difference]: With dead ends: 3121 [2021-06-12 22:24:51,950 INFO L226 Difference]: Without dead ends: 3055 [2021-06-12 22:24:51,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1283.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:24:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-06-12 22:24:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1882. [2021-06-12 22:24:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.3694843168527377) internal successors, (6338), 1881 states have internal predecessors, (6338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6338 transitions. [2021-06-12 22:24:51,976 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6338 transitions. Word has length 26 [2021-06-12 22:24:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:51,976 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6338 transitions. [2021-06-12 22:24:51,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-12 22:24:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6338 transitions. [2021-06-12 22:24:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:51,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:51,978 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:52,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-06-12 22:24:52,179 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1066719206, now seen corresponding path program 56 times [2021-06-12 22:24:52,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:52,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45115581] [2021-06-12 22:24:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:52,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:52,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45115581] [2021-06-12 22:24:52,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45115581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:52,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368437718] [2021-06-12 22:24:52,298 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:52,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:52,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:52,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:52,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-12 22:24:52,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:52,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:52,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:52,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-06-12 22:24:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:52,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368437718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:52,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:52,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:52,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896798304] [2021-06-12 22:24:52,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:52,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:52,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:52,499 INFO L87 Difference]: Start difference. First operand 1882 states and 6338 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:53,398 INFO L93 Difference]: Finished difference Result 2561 states and 8454 transitions. [2021-06-12 22:24:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:24:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:53,401 INFO L225 Difference]: With dead ends: 2561 [2021-06-12 22:24:53,401 INFO L226 Difference]: Without dead ends: 2546 [2021-06-12 22:24:53,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:24:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-12 22:24:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1884. [2021-06-12 22:24:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.365374402549124) internal successors, (6337), 1883 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6337 transitions. [2021-06-12 22:24:53,424 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6337 transitions. Word has length 26 [2021-06-12 22:24:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:53,424 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6337 transitions. [2021-06-12 22:24:53,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6337 transitions. [2021-06-12 22:24:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:53,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:53,426 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:53,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:53,627 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-06-12 22:24:53,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:53,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536832627] [2021-06-12 22:24:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:53,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:53,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536832627] [2021-06-12 22:24:53,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536832627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:53,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32530063] [2021-06-12 22:24:53,749 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:53,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:53,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:53,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:53,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:53,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-12 22:24:53,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:53,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:53,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:24:53,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-06-12 22:24:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:54,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32530063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:54,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:54,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729109006] [2021-06-12 22:24:54,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:54,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:54,048 INFO L87 Difference]: Start difference. First operand 1884 states and 6337 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:54,579 INFO L93 Difference]: Finished difference Result 2552 states and 8397 transitions. [2021-06-12 22:24:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:24:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-12 22:24:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:54,582 INFO L225 Difference]: With dead ends: 2552 [2021-06-12 22:24:54,583 INFO L226 Difference]: Without dead ends: 2527 [2021-06-12 22:24:54,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:24:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-06-12 22:24:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1871. [2021-06-12 22:24:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.36524064171123) internal successors, (6293), 1870 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6293 transitions. [2021-06-12 22:24:54,605 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6293 transitions. Word has length 26 [2021-06-12 22:24:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:54,605 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6293 transitions. [2021-06-12 22:24:54,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6293 transitions. [2021-06-12 22:24:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:54,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:54,607 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:54,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-12 22:24:54,808 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-06-12 22:24:54,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:54,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879032309] [2021-06-12 22:24:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:54,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:54,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879032309] [2021-06-12 22:24:54,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879032309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:54,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314119679] [2021-06-12 22:24:54,967 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:54,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:24:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:55,144 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:24:55,145 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-06-12 22:24:55,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:55,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:55,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:55,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-06-12 22:24:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:55,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314119679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:55,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:55,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:24:55,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628709235] [2021-06-12 22:24:55,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:55,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:55,197 INFO L87 Difference]: Start difference. First operand 1871 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:55,750 INFO L93 Difference]: Finished difference Result 2462 states and 8140 transitions. [2021-06-12 22:24:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:24:55,751 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-12 22:24:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:55,754 INFO L225 Difference]: With dead ends: 2462 [2021-06-12 22:24:55,754 INFO L226 Difference]: Without dead ends: 2447 [2021-06-12 22:24:55,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:24:55,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-12 22:24:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1865. [2021-06-12 22:24:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3664163090128754) internal successors, (6275), 1864 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6275 transitions. [2021-06-12 22:24:55,779 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6275 transitions. Word has length 26 [2021-06-12 22:24:55,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:55,779 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 6275 transitions. [2021-06-12 22:24:55,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-06-12 22:24:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6275 transitions. [2021-06-12 22:24:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:55,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:55,781 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:55,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-12 22:24:55,982 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:55,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1210206466, now seen corresponding path program 67 times [2021-06-12 22:24:55,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:55,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706630751] [2021-06-12 22:24:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:56,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:56,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706630751] [2021-06-12 22:24:56,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706630751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:56,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713382268] [2021-06-12 22:24:56,172 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:24:56,319 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 21 treesize of output 11 [2021-06-12 22:24:56,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:56,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:56,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:56,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-06-12 22:24:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:56,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713382268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:56,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:56,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:24:56,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917037898] [2021-06-12 22:24:56,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:24:56,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:24:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:24:56,346 INFO L87 Difference]: Start difference. First operand 1865 states and 6275 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:57,092 INFO L93 Difference]: Finished difference Result 2375 states and 7798 transitions. [2021-06-12 22:24:57,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:24:57,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:24:57,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:57,095 INFO L225 Difference]: With dead ends: 2375 [2021-06-12 22:24:57,095 INFO L226 Difference]: Without dead ends: 2356 [2021-06-12 22:24:57,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 699.7ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:24:57,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-12 22:24:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1855. [2021-06-12 22:24:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.366774541531823) internal successors, (6242), 1854 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6242 transitions. [2021-06-12 22:24:57,117 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6242 transitions. Word has length 26 [2021-06-12 22:24:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:57,117 INFO L482 AbstractCegarLoop]: Abstraction has 1855 states and 6242 transitions. [2021-06-12 22:24:57,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6242 transitions. [2021-06-12 22:24:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:57,119 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:57,119 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:57,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-12 22:24:57,321 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 68 times [2021-06-12 22:24:57,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:57,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381516030] [2021-06-12 22:24:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:57,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:57,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381516030] [2021-06-12 22:24:57,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381516030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:57,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582965111] [2021-06-12 22:24:57,551 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:57,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:57,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:57,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:57,790 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:24:57,790 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 84 treesize of output 78 [2021-06-12 22:24:57,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:24:57,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:57,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:57,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:22 [2021-06-12 22:24:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:57,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582965111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:57,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:57,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:24:57,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231207615] [2021-06-12 22:24:57,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:57,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:57,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:57,846 INFO L87 Difference]: Start difference. First operand 1855 states and 6242 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-12 22:24:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:58,764 INFO L93 Difference]: Finished difference Result 2478 states and 8169 transitions. [2021-06-12 22:24:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:24:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-12 22:24:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:58,768 INFO L225 Difference]: With dead ends: 2478 [2021-06-12 22:24:58,768 INFO L226 Difference]: Without dead ends: 2463 [2021-06-12 22:24:58,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 762.4ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:24:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-12 22:24:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1857. [2021-06-12 22:24:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-12 22:24:58,792 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-12 22:24:58,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:58,792 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-12 22:24:58,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-06-12 22:24:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-12 22:24:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:24:58,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:58,795 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:58,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:58,997 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:58,997 INFO L82 PathProgramCache]: Analyzing trace with hash 503651198, now seen corresponding path program 69 times [2021-06-12 22:24:58,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:58,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840816750] [2021-06-12 22:24:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:59,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:59,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840816750] [2021-06-12 22:24:59,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840816750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:59,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231822322] [2021-06-12 22:24:59,236 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:59,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:24:59,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 22:24:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:59,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:59,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:24:59,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:59,413 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 21 treesize of output 39 [2021-06-12 22:24:59,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:24:59,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:24:59,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:24:59,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-06-12 22:24:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231822322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:59,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:59,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:24:59,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052292564] [2021-06-12 22:24:59,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:24:59,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:59,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:24:59,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:24:59,503 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-12 22:25:00,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:00,289 INFO L93 Difference]: Finished difference Result 2626 states and 8587 transitions. [2021-06-12 22:25:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:25:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-06-12 22:25:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:00,294 INFO L225 Difference]: With dead ends: 2626 [2021-06-12 22:25:00,294 INFO L226 Difference]: Without dead ends: 2596 [2021-06-12 22:25:00,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 762.4ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:25:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-12 22:25:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1857. [2021-06-12 22:25:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-06-12 22:25:00,326 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-06-12 22:25:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:00,326 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-06-12 22:25:00,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-06-12 22:25:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-06-12 22:25:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:00,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:00,329 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:00,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-12 22:25:00,551 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:00,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:00,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-06-12 22:25:00,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:00,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039919825] [2021-06-12 22:25:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:00,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:00,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039919825] [2021-06-12 22:25:00,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039919825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:00,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717092455] [2021-06-12 22:25:00,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:00,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:25:00,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:00,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717092455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:00,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:00,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:25:00,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451921721] [2021-06-12 22:25:00,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:25:00,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:25:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:25:00,789 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-12 22:25:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:02,033 INFO L93 Difference]: Finished difference Result 4803 states and 14780 transitions. [2021-06-12 22:25:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:25:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-06-12 22:25:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:02,042 INFO L225 Difference]: With dead ends: 4803 [2021-06-12 22:25:02,042 INFO L226 Difference]: Without dead ends: 4803 [2021-06-12 22:25:02,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 727.9ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:25:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-06-12 22:25:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2054. [2021-06-12 22:25:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.4305893813930832) internal successors, (7043), 2053 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 7043 transitions. [2021-06-12 22:25:02,100 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 7043 transitions. Word has length 28 [2021-06-12 22:25:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:02,100 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 7043 transitions. [2021-06-12 22:25:02,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-12 22:25:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 7043 transitions. [2021-06-12 22:25:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:02,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:02,105 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:02,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-12 22:25:02,327 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-06-12 22:25:02,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:02,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112996076] [2021-06-12 22:25:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:02,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:02,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112996076] [2021-06-12 22:25:02,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112996076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:02,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984736165] [2021-06-12 22:25:02,376 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:02,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:25:02,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:02,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984736165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:02,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:02,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:25:02,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498425891] [2021-06-12 22:25:02,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:25:02,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:02,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:25:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:25:02,566 INFO L87 Difference]: Start difference. First operand 2054 states and 7043 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:04,089 INFO L93 Difference]: Finished difference Result 6390 states and 19386 transitions. [2021-06-12 22:25:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:25:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:04,098 INFO L225 Difference]: With dead ends: 6390 [2021-06-12 22:25:04,098 INFO L226 Difference]: Without dead ends: 6390 [2021-06-12 22:25:04,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 888.9ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:25:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2021-06-12 22:25:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 2065. [2021-06-12 22:25:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.438468992248062) internal successors, (7097), 2064 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7097 transitions. [2021-06-12 22:25:04,165 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7097 transitions. Word has length 28 [2021-06-12 22:25:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:04,165 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 7097 transitions. [2021-06-12 22:25:04,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7097 transitions. [2021-06-12 22:25:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:04,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:04,168 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:04,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-12 22:25:04,369 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-06-12 22:25:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:04,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773806396] [2021-06-12 22:25:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:04,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:04,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773806396] [2021-06-12 22:25:04,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773806396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:04,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461992881] [2021-06-12 22:25:04,435 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:04,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:04,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:04,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461992881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:04,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:04,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:25:04,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384516479] [2021-06-12 22:25:04,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:25:04,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:25:04,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:25:04,602 INFO L87 Difference]: Start difference. First operand 2065 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:06,212 INFO L93 Difference]: Finished difference Result 5783 states and 17918 transitions. [2021-06-12 22:25:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:25:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:06,222 INFO L225 Difference]: With dead ends: 5783 [2021-06-12 22:25:06,222 INFO L226 Difference]: Without dead ends: 5783 [2021-06-12 22:25:06,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 968.2ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:25:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-06-12 22:25:06,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 2013. [2021-06-12 22:25:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 3.412027833001988) internal successors, (6865), 2012 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 6865 transitions. [2021-06-12 22:25:06,279 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 6865 transitions. Word has length 28 [2021-06-12 22:25:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:06,280 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 6865 transitions. [2021-06-12 22:25:06,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 6865 transitions. [2021-06-12 22:25:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:06,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:06,304 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:06,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:06,526 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:06,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-06-12 22:25:06,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:06,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703935094] [2021-06-12 22:25:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:06,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:06,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703935094] [2021-06-12 22:25:06,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703935094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:06,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284666802] [2021-06-12 22:25:06,580 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:06,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:06,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:06,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:06,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284666802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:06,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:06,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:25:06,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922958347] [2021-06-12 22:25:06,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:25:06,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:25:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:25:06,741 INFO L87 Difference]: Start difference. First operand 2013 states and 6865 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:08,148 INFO L93 Difference]: Finished difference Result 4901 states and 14979 transitions. [2021-06-12 22:25:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:25:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:08,157 INFO L225 Difference]: With dead ends: 4901 [2021-06-12 22:25:08,157 INFO L226 Difference]: Without dead ends: 4901 [2021-06-12 22:25:08,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 807.1ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:25:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-12 22:25:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 2023. [2021-06-12 22:25:08,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.408011869436202) internal successors, (6891), 2022 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6891 transitions. [2021-06-12 22:25:08,195 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6891 transitions. Word has length 28 [2021-06-12 22:25:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:08,195 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6891 transitions. [2021-06-12 22:25:08,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6891 transitions. [2021-06-12 22:25:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:08,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:08,198 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:08,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:08,398 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:08,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 70 times [2021-06-12 22:25:08,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:08,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212422918] [2021-06-12 22:25:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:08,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:08,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212422918] [2021-06-12 22:25:08,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212422918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:08,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728913548] [2021-06-12 22:25:08,472 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:08,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:08,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:08,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728913548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:08,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:08,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:25:08,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72259805] [2021-06-12 22:25:08,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:08,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:08,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:08,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:08,604 INFO L87 Difference]: Start difference. First operand 2023 states and 6891 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:09,165 INFO L93 Difference]: Finished difference Result 4322 states and 13382 transitions. [2021-06-12 22:25:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:25:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:09,170 INFO L225 Difference]: With dead ends: 4322 [2021-06-12 22:25:09,170 INFO L226 Difference]: Without dead ends: 4322 [2021-06-12 22:25:09,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:25:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-06-12 22:25:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 2079. [2021-06-12 22:25:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 3.3946102021174207) internal successors, (7054), 2078 states have internal predecessors, (7054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7054 transitions. [2021-06-12 22:25:09,202 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7054 transitions. Word has length 28 [2021-06-12 22:25:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:09,202 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 7054 transitions. [2021-06-12 22:25:09,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7054 transitions. [2021-06-12 22:25:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:09,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:09,204 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:09,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-12 22:25:09,405 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:09,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:09,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-06-12 22:25:09,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:09,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950775183] [2021-06-12 22:25:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:09,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:09,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950775183] [2021-06-12 22:25:09,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950775183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:09,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549799532] [2021-06-12 22:25:09,432 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:09,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:25:09,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:09,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:25:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:09,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549799532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:09,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:09,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:25:09,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318324161] [2021-06-12 22:25:09,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:25:09,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:25:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:25:09,520 INFO L87 Difference]: Start difference. First operand 2079 states and 7054 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) [2021-06-12 22:25:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:09,701 INFO L93 Difference]: Finished difference Result 3611 states and 11674 transitions. [2021-06-12 22:25:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:25:09,701 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 28 [2021-06-12 22:25:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:09,706 INFO L225 Difference]: With dead ends: 3611 [2021-06-12 22:25:09,706 INFO L226 Difference]: Without dead ends: 3593 [2021-06-12 22:25:09,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:25:09,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-06-12 22:25:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2470. [2021-06-12 22:25:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.4726609963547994) internal successors, (8574), 2469 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8574 transitions. [2021-06-12 22:25:09,736 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8574 transitions. Word has length 28 [2021-06-12 22:25:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:09,736 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8574 transitions. [2021-06-12 22:25:09,736 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) [2021-06-12 22:25:09,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8574 transitions. [2021-06-12 22:25:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:09,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:09,739 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:09,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-12 22:25:09,939 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-06-12 22:25:09,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:09,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642117265] [2021-06-12 22:25:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:09,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642117265] [2021-06-12 22:25:09,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642117265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470720306] [2021-06-12 22:25:09,972 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:09,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:09,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:09,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:10,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470720306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:10,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:10,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:25:10,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074833982] [2021-06-12 22:25:10,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:10,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:10,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:10,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:10,080 INFO L87 Difference]: Start difference. First operand 2470 states and 8574 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:10,631 INFO L93 Difference]: Finished difference Result 4256 states and 13496 transitions. [2021-06-12 22:25:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:25:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:25:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:10,638 INFO L225 Difference]: With dead ends: 4256 [2021-06-12 22:25:10,638 INFO L226 Difference]: Without dead ends: 4209 [2021-06-12 22:25:10,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:25:10,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-12 22:25:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2635. [2021-06-12 22:25:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.4935459377372817) internal successors, (9202), 2634 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9202 transitions. [2021-06-12 22:25:10,679 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9202 transitions. Word has length 28 [2021-06-12 22:25:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:10,679 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 9202 transitions. [2021-06-12 22:25:10,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9202 transitions. [2021-06-12 22:25:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:10,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:10,682 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:10,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:10,883 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 71 times [2021-06-12 22:25:10,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:10,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731259775] [2021-06-12 22:25:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:10,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:10,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731259775] [2021-06-12 22:25:10,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731259775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:10,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724873658] [2021-06-12 22:25:10,923 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:10,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:25:10,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:10,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:11,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724873658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:11,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:11,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 22:25:11,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943789889] [2021-06-12 22:25:11,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:25:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:25:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:25:11,045 INFO L87 Difference]: Start difference. First operand 2635 states and 9202 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-12 22:25:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:11,452 INFO L93 Difference]: Finished difference Result 5094 states and 16833 transitions. [2021-06-12 22:25:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:25:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-12 22:25:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:11,459 INFO L225 Difference]: With dead ends: 5094 [2021-06-12 22:25:11,459 INFO L226 Difference]: Without dead ends: 5007 [2021-06-12 22:25:11,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-06-12 22:25:11,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 3294. [2021-06-12 22:25:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 3.5204980261160035) internal successors, (11593), 3293 states have internal predecessors, (11593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:11,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 11593 transitions. [2021-06-12 22:25:11,509 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 11593 transitions. Word has length 28 [2021-06-12 22:25:11,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:11,510 INFO L482 AbstractCegarLoop]: Abstraction has 3294 states and 11593 transitions. [2021-06-12 22:25:11,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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) [2021-06-12 22:25:11,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 11593 transitions. [2021-06-12 22:25:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:11,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:11,513 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:11,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-12 22:25:11,714 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:11,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-06-12 22:25:11,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:11,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889732156] [2021-06-12 22:25:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:11,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:11,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889732156] [2021-06-12 22:25:11,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889732156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:11,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475290985] [2021-06-12 22:25:11,747 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:11,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:25:11,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:11,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:11,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475290985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:11,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:11,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:25:11,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611697008] [2021-06-12 22:25:11,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:11,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:11,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:11,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:11,878 INFO L87 Difference]: Start difference. First operand 3294 states and 11593 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:12,560 INFO L93 Difference]: Finished difference Result 5537 states and 17511 transitions. [2021-06-12 22:25:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:25:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:12,567 INFO L225 Difference]: With dead ends: 5537 [2021-06-12 22:25:12,568 INFO L226 Difference]: Without dead ends: 5511 [2021-06-12 22:25:12,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:25:12,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-12 22:25:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3312. [2021-06-12 22:25:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 3.5258230141951072) internal successors, (11674), 3311 states have internal predecessors, (11674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 11674 transitions. [2021-06-12 22:25:12,640 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 11674 transitions. Word has length 28 [2021-06-12 22:25:12,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:12,640 INFO L482 AbstractCegarLoop]: Abstraction has 3312 states and 11674 transitions. [2021-06-12 22:25:12,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:12,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 11674 transitions. [2021-06-12 22:25:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:12,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:12,644 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:12,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:12,845 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-06-12 22:25:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:12,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503165284] [2021-06-12 22:25:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:12,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:12,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503165284] [2021-06-12 22:25:12,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503165284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:12,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692702702] [2021-06-12 22:25:12,877 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:12,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:25:12,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:12,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:12,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:12,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692702702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:12,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:12,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:25:12,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131701769] [2021-06-12 22:25:12,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:12,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:12,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:12,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:12,993 INFO L87 Difference]: Start difference. First operand 3312 states and 11674 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:13,657 INFO L93 Difference]: Finished difference Result 5592 states and 17703 transitions. [2021-06-12 22:25:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:25:13,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:13,665 INFO L225 Difference]: With dead ends: 5592 [2021-06-12 22:25:13,665 INFO L226 Difference]: Without dead ends: 5561 [2021-06-12 22:25:13,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:25:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-12 22:25:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3305. [2021-06-12 22:25:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 3.5320823244552058) internal successors, (11670), 3304 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 11670 transitions. [2021-06-12 22:25:13,723 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 11670 transitions. Word has length 28 [2021-06-12 22:25:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:13,723 INFO L482 AbstractCegarLoop]: Abstraction has 3305 states and 11670 transitions. [2021-06-12 22:25:13,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 11670 transitions. [2021-06-12 22:25:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:13,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:13,727 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:13,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-12 22:25:13,928 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-06-12 22:25:13,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:13,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533390257] [2021-06-12 22:25:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:13,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:13,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533390257] [2021-06-12 22:25:13,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533390257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:13,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977358868] [2021-06-12 22:25:13,964 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:13,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:13,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:14,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977358868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:14,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:14,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:25:14,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151429503] [2021-06-12 22:25:14,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:14,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:14,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:14,079 INFO L87 Difference]: Start difference. First operand 3305 states and 11670 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:25:14,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:14,616 INFO L93 Difference]: Finished difference Result 6756 states and 21782 transitions. [2021-06-12 22:25:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:25:14,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:25:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:14,626 INFO L225 Difference]: With dead ends: 6756 [2021-06-12 22:25:14,626 INFO L226 Difference]: Without dead ends: 6709 [2021-06-12 22:25:14,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:25:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-12 22:25:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 3468. [2021-06-12 22:25:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 3467 states have (on average 3.5785982117104123) internal successors, (12407), 3467 states have internal predecessors, (12407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 12407 transitions. [2021-06-12 22:25:14,699 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 12407 transitions. Word has length 28 [2021-06-12 22:25:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:14,699 INFO L482 AbstractCegarLoop]: Abstraction has 3468 states and 12407 transitions. [2021-06-12 22:25:14,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:25:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 12407 transitions. [2021-06-12 22:25:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:14,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:14,704 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:14,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-12 22:25:14,904 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:14,905 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 68 times [2021-06-12 22:25:14,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:14,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037254123] [2021-06-12 22:25:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:14,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037254123] [2021-06-12 22:25:14,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037254123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075518066] [2021-06-12 22:25:14,928 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:14,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:25:14,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:15,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075518066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:15,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:15,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:25:15,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941302183] [2021-06-12 22:25:15,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:25:15,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:15,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:25:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:25:15,015 INFO L87 Difference]: Start difference. First operand 3468 states and 12407 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 22:25:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:15,171 INFO L93 Difference]: Finished difference Result 5162 states and 17045 transitions. [2021-06-12 22:25:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:25:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-06-12 22:25:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:15,178 INFO L225 Difference]: With dead ends: 5162 [2021-06-12 22:25:15,178 INFO L226 Difference]: Without dead ends: 5162 [2021-06-12 22:25:15,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:25:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-12 22:25:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 3300. [2021-06-12 22:25:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3299 states have (on average 3.5383449530160656) internal successors, (11673), 3299 states have internal predecessors, (11673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 11673 transitions. [2021-06-12 22:25:15,242 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 11673 transitions. Word has length 28 [2021-06-12 22:25:15,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:15,242 INFO L482 AbstractCegarLoop]: Abstraction has 3300 states and 11673 transitions. [2021-06-12 22:25:15,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2021-06-12 22:25:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 11673 transitions. [2021-06-12 22:25:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:15,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:15,246 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:15,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-12 22:25:15,446 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 69 times [2021-06-12 22:25:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:15,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566029404] [2021-06-12 22:25:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:15,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:15,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566029404] [2021-06-12 22:25:15,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566029404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:15,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937731095] [2021-06-12 22:25:15,481 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:15,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:25:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:15,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:15,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937731095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:15,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:15,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:25:15,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38596516] [2021-06-12 22:25:15,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:15,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:15,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:15,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:15,589 INFO L87 Difference]: Start difference. First operand 3300 states and 11673 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:25:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:16,263 INFO L93 Difference]: Finished difference Result 7204 states and 22976 transitions. [2021-06-12 22:25:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:25:16,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:25:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:16,274 INFO L225 Difference]: With dead ends: 7204 [2021-06-12 22:25:16,274 INFO L226 Difference]: Without dead ends: 7204 [2021-06-12 22:25:16,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:25:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7204 states. [2021-06-12 22:25:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7204 to 3330. [2021-06-12 22:25:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 3.5379993992189847) internal successors, (11778), 3329 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 11778 transitions. [2021-06-12 22:25:16,356 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 11778 transitions. Word has length 28 [2021-06-12 22:25:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:16,356 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 11778 transitions. [2021-06-12 22:25:16,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:25:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 11778 transitions. [2021-06-12 22:25:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:16,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:16,361 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:16,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 22:25:16,561 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:16,562 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 70 times [2021-06-12 22:25:16,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:16,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640206328] [2021-06-12 22:25:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:16,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:16,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640206328] [2021-06-12 22:25:16,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640206328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:16,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197109267] [2021-06-12 22:25:16,600 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:16,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:16,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:16,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:16,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197109267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:16,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:16,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:25:16,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673026874] [2021-06-12 22:25:16,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:16,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:16,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:16,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:16,731 INFO L87 Difference]: Start difference. First operand 3330 states and 11778 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:25:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:17,475 INFO L93 Difference]: Finished difference Result 7509 states and 23981 transitions. [2021-06-12 22:25:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:25:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:25:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:17,488 INFO L225 Difference]: With dead ends: 7509 [2021-06-12 22:25:17,488 INFO L226 Difference]: Without dead ends: 7509 [2021-06-12 22:25:17,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:25:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-06-12 22:25:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 3460. [2021-06-12 22:25:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3459 states have (on average 3.5226944203527033) internal successors, (12185), 3459 states have internal predecessors, (12185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 12185 transitions. [2021-06-12 22:25:17,578 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 12185 transitions. Word has length 28 [2021-06-12 22:25:17,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:17,578 INFO L482 AbstractCegarLoop]: Abstraction has 3460 states and 12185 transitions. [2021-06-12 22:25:17,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:25:17,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 12185 transitions. [2021-06-12 22:25:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:17,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:17,582 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:17,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-12 22:25:17,783 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 71 times [2021-06-12 22:25:17,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:17,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719678064] [2021-06-12 22:25:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:17,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:17,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719678064] [2021-06-12 22:25:17,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719678064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:17,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771113620] [2021-06-12 22:25:17,829 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:17,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:25:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:17,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:17,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771113620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:17,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:17,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:25:17,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62877773] [2021-06-12 22:25:17,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:17,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:17,945 INFO L87 Difference]: Start difference. First operand 3460 states and 12185 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:25:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:18,620 INFO L93 Difference]: Finished difference Result 8003 states and 25580 transitions. [2021-06-12 22:25:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:25:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:25:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:18,635 INFO L225 Difference]: With dead ends: 8003 [2021-06-12 22:25:18,635 INFO L226 Difference]: Without dead ends: 7990 [2021-06-12 22:25:18,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:25:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-12 22:25:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 4105. [2021-06-12 22:25:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 4104 states have (on average 3.5689571150097468) internal successors, (14647), 4104 states have internal predecessors, (14647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 14647 transitions. [2021-06-12 22:25:18,735 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 14647 transitions. Word has length 28 [2021-06-12 22:25:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:18,736 INFO L482 AbstractCegarLoop]: Abstraction has 4105 states and 14647 transitions. [2021-06-12 22:25:18,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:25:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 14647 transitions. [2021-06-12 22:25:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:18,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:18,741 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:18,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-12 22:25:18,942 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 72 times [2021-06-12 22:25:18,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:18,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985402638] [2021-06-12 22:25:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:18,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:18,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985402638] [2021-06-12 22:25:18,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985402638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:18,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126314527] [2021-06-12 22:25:18,975 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:19,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:25:19,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:19,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:19,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:19,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126314527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:19,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:19,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:25:19,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717993805] [2021-06-12 22:25:19,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:19,076 INFO L87 Difference]: Start difference. First operand 4105 states and 14647 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:25:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:19,662 INFO L93 Difference]: Finished difference Result 8255 states and 26274 transitions. [2021-06-12 22:25:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:25:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:25:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:19,675 INFO L225 Difference]: With dead ends: 8255 [2021-06-12 22:25:19,676 INFO L226 Difference]: Without dead ends: 8255 [2021-06-12 22:25:19,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:25:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-06-12 22:25:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 3852. [2021-06-12 22:25:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 3.5344066476239937) internal successors, (13611), 3851 states have internal predecessors, (13611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 13611 transitions. [2021-06-12 22:25:19,789 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 13611 transitions. Word has length 28 [2021-06-12 22:25:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:19,789 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 13611 transitions. [2021-06-12 22:25:19,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:25:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 13611 transitions. [2021-06-12 22:25:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:19,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:19,795 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:19,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:19,997 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 73 times [2021-06-12 22:25:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:19,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058006107] [2021-06-12 22:25:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:20,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:20,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058006107] [2021-06-12 22:25:20,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058006107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:20,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584088399] [2021-06-12 22:25:20,033 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:20,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:20,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584088399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:20,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:20,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:25:20,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661556712] [2021-06-12 22:25:20,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:20,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:20,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:20,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:20,128 INFO L87 Difference]: Start difference. First operand 3852 states and 13611 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:25:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:20,824 INFO L93 Difference]: Finished difference Result 7348 states and 24071 transitions. [2021-06-12 22:25:20,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:25:20,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:25:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:20,836 INFO L225 Difference]: With dead ends: 7348 [2021-06-12 22:25:20,836 INFO L226 Difference]: Without dead ends: 7344 [2021-06-12 22:25:20,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:25:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2021-06-12 22:25:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 3485. [2021-06-12 22:25:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3484 states have (on average 3.577784156142365) internal successors, (12465), 3484 states have internal predecessors, (12465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 12465 transitions. [2021-06-12 22:25:20,917 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 12465 transitions. Word has length 28 [2021-06-12 22:25:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:20,917 INFO L482 AbstractCegarLoop]: Abstraction has 3485 states and 12465 transitions. [2021-06-12 22:25:20,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:25:20,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 12465 transitions. [2021-06-12 22:25:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:20,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:20,922 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:21,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-12 22:25:21,122 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 74 times [2021-06-12 22:25:21,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:21,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992743779] [2021-06-12 22:25:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:21,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:21,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992743779] [2021-06-12 22:25:21,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992743779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:21,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827272365] [2021-06-12 22:25:21,159 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:21,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:21,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:21,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827272365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:21,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:21,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:25:21,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543316348] [2021-06-12 22:25:21,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:21,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:21,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:21,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:21,286 INFO L87 Difference]: Start difference. First operand 3485 states and 12465 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:25:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:22,294 INFO L93 Difference]: Finished difference Result 11702 states and 38583 transitions. [2021-06-12 22:25:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:25:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-12 22:25:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:22,312 INFO L225 Difference]: With dead ends: 11702 [2021-06-12 22:25:22,312 INFO L226 Difference]: Without dead ends: 11702 [2021-06-12 22:25:22,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:25:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11702 states. [2021-06-12 22:25:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11702 to 3776. [2021-06-12 22:25:22,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3776 states, 3775 states have (on average 3.6603973509933776) internal successors, (13818), 3775 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 13818 transitions. [2021-06-12 22:25:22,438 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 13818 transitions. Word has length 28 [2021-06-12 22:25:22,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:22,438 INFO L482 AbstractCegarLoop]: Abstraction has 3776 states and 13818 transitions. [2021-06-12 22:25:22,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:25:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 13818 transitions. [2021-06-12 22:25:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:22,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:22,443 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:22,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-12 22:25:22,644 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:22,644 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 75 times [2021-06-12 22:25:22,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:22,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296967235] [2021-06-12 22:25:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:22,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:22,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296967235] [2021-06-12 22:25:22,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296967235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:22,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837799501] [2021-06-12 22:25:22,679 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:22,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:25:22,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:22,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:22,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837799501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:22,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:22,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:25:22,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822309092] [2021-06-12 22:25:22,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:22,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:22,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:22,801 INFO L87 Difference]: Start difference. First operand 3776 states and 13818 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:25:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:23,790 INFO L93 Difference]: Finished difference Result 11394 states and 37759 transitions. [2021-06-12 22:25:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:25:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-12 22:25:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:23,809 INFO L225 Difference]: With dead ends: 11394 [2021-06-12 22:25:23,810 INFO L226 Difference]: Without dead ends: 11394 [2021-06-12 22:25:23,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 604.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:25:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-06-12 22:25:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 3727. [2021-06-12 22:25:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 3726 states have (on average 3.640096618357488) internal successors, (13563), 3726 states have internal predecessors, (13563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 13563 transitions. [2021-06-12 22:25:23,930 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 13563 transitions. Word has length 28 [2021-06-12 22:25:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:23,930 INFO L482 AbstractCegarLoop]: Abstraction has 3727 states and 13563 transitions. [2021-06-12 22:25:23,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-06-12 22:25:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 13563 transitions. [2021-06-12 22:25:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:23,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:23,935 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:24,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:24,135 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:24,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 76 times [2021-06-12 22:25:24,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:24,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533887789] [2021-06-12 22:25:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:24,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:24,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533887789] [2021-06-12 22:25:24,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533887789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:24,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251451737] [2021-06-12 22:25:24,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:24,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:24,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:24,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251451737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:24,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:24,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:25:24,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365048720] [2021-06-12 22:25:24,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:24,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:24,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:24,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:24,280 INFO L87 Difference]: Start difference. First operand 3727 states and 13563 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:25:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:25,211 INFO L93 Difference]: Finished difference Result 10677 states and 34212 transitions. [2021-06-12 22:25:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:25:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:25:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:25,227 INFO L225 Difference]: With dead ends: 10677 [2021-06-12 22:25:25,227 INFO L226 Difference]: Without dead ends: 10677 [2021-06-12 22:25:25,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:25:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2021-06-12 22:25:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 3767. [2021-06-12 22:25:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 3.6444503451938397) internal successors, (13725), 3766 states have internal predecessors, (13725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 13725 transitions. [2021-06-12 22:25:25,335 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 13725 transitions. Word has length 28 [2021-06-12 22:25:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:25,336 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 13725 transitions. [2021-06-12 22:25:25,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:25:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 13725 transitions. [2021-06-12 22:25:25,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:25,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:25,340 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:25,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:25,541 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 77 times [2021-06-12 22:25:25,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:25,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436248318] [2021-06-12 22:25:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:25,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:25,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436248318] [2021-06-12 22:25:25,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436248318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:25,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163383560] [2021-06-12 22:25:25,575 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:25,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:25:25,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:25,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:25,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163383560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:25,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:25,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:25:25,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82409677] [2021-06-12 22:25:25,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:25,677 INFO L87 Difference]: Start difference. First operand 3767 states and 13725 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:25:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:26,540 INFO L93 Difference]: Finished difference Result 10058 states and 32692 transitions. [2021-06-12 22:25:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:25:26,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:25:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:26,562 INFO L225 Difference]: With dead ends: 10058 [2021-06-12 22:25:26,562 INFO L226 Difference]: Without dead ends: 10050 [2021-06-12 22:25:26,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:25:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10050 states. [2021-06-12 22:25:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10050 to 3733. [2021-06-12 22:25:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 3.6393354769560555) internal successors, (13582), 3732 states have internal predecessors, (13582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 13582 transitions. [2021-06-12 22:25:26,685 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 13582 transitions. Word has length 28 [2021-06-12 22:25:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:26,686 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 13582 transitions. [2021-06-12 22:25:26,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:25:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 13582 transitions. [2021-06-12 22:25:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:26,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:26,690 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:26,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:26,891 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 78 times [2021-06-12 22:25:26,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:26,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144790445] [2021-06-12 22:25:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:26,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:26,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144790445] [2021-06-12 22:25:26,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144790445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:26,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866724846] [2021-06-12 22:25:26,928 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:26,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:25:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:26,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866724846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:27,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:27,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:25:27,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307807066] [2021-06-12 22:25:27,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:27,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:27,050 INFO L87 Difference]: Start difference. First operand 3733 states and 13582 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:28,006 INFO L93 Difference]: Finished difference Result 9657 states and 31573 transitions. [2021-06-12 22:25:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:25:28,006 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:28,021 INFO L225 Difference]: With dead ends: 9657 [2021-06-12 22:25:28,021 INFO L226 Difference]: Without dead ends: 9657 [2021-06-12 22:25:28,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:25:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9657 states. [2021-06-12 22:25:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9657 to 3749. [2021-06-12 22:25:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3748 states have (on average 3.6408751334044824) internal successors, (13646), 3748 states have internal predecessors, (13646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 13646 transitions. [2021-06-12 22:25:28,124 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 13646 transitions. Word has length 28 [2021-06-12 22:25:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:28,125 INFO L482 AbstractCegarLoop]: Abstraction has 3749 states and 13646 transitions. [2021-06-12 22:25:28,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 13646 transitions. [2021-06-12 22:25:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:28,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:28,130 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:28,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-12 22:25:28,330 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 79 times [2021-06-12 22:25:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:28,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018883262] [2021-06-12 22:25:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:28,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:28,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018883262] [2021-06-12 22:25:28,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018883262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:28,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056265183] [2021-06-12 22:25:28,363 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:28,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:28,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056265183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:28,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:28,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:25:28,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848631237] [2021-06-12 22:25:28,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:28,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:28,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:28,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:28,475 INFO L87 Difference]: Start difference. First operand 3749 states and 13646 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:29,395 INFO L93 Difference]: Finished difference Result 9322 states and 30778 transitions. [2021-06-12 22:25:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:25:29,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:29,410 INFO L225 Difference]: With dead ends: 9322 [2021-06-12 22:25:29,410 INFO L226 Difference]: Without dead ends: 9314 [2021-06-12 22:25:29,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:25:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-06-12 22:25:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 3417. [2021-06-12 22:25:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.55327868852459) internal successors, (12138), 3416 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 12138 transitions. [2021-06-12 22:25:29,515 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 12138 transitions. Word has length 28 [2021-06-12 22:25:29,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:29,515 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 12138 transitions. [2021-06-12 22:25:29,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 12138 transitions. [2021-06-12 22:25:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:29,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:29,519 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:29,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-12 22:25:29,719 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:29,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 80 times [2021-06-12 22:25:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:29,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070437912] [2021-06-12 22:25:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:29,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070437912] [2021-06-12 22:25:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070437912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147244793] [2021-06-12 22:25:29,754 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:29,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:29,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:29,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147244793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:29,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:29,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:25:29,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964497479] [2021-06-12 22:25:29,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:25:29,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:25:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:25:29,874 INFO L87 Difference]: Start difference. First operand 3417 states and 12138 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:25:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:30,711 INFO L93 Difference]: Finished difference Result 7074 states and 23087 transitions. [2021-06-12 22:25:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:25:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:25:30,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:30,721 INFO L225 Difference]: With dead ends: 7074 [2021-06-12 22:25:30,722 INFO L226 Difference]: Without dead ends: 7074 [2021-06-12 22:25:30,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:25:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7074 states. [2021-06-12 22:25:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7074 to 3429. [2021-06-12 22:25:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.5519253208868147) internal successors, (12176), 3428 states have internal predecessors, (12176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12176 transitions. [2021-06-12 22:25:30,796 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12176 transitions. Word has length 28 [2021-06-12 22:25:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:30,796 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12176 transitions. [2021-06-12 22:25:30,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:25:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12176 transitions. [2021-06-12 22:25:30,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:30,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:30,801 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:31,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-12 22:25:31,001 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:31,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 81 times [2021-06-12 22:25:31,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:31,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92686773] [2021-06-12 22:25:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:31,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92686773] [2021-06-12 22:25:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92686773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928178288] [2021-06-12 22:25:31,059 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:31,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:25:31,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:31,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:31,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:31,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928178288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:31,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:31,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:25:31,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922425811] [2021-06-12 22:25:31,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:25:31,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:31,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:25:31,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:25:31,192 INFO L87 Difference]: Start difference. First operand 3429 states and 12176 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:32,267 INFO L93 Difference]: Finished difference Result 8002 states and 25476 transitions. [2021-06-12 22:25:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:25:32,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:32,281 INFO L225 Difference]: With dead ends: 8002 [2021-06-12 22:25:32,281 INFO L226 Difference]: Without dead ends: 8002 [2021-06-12 22:25:32,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 695.3ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:25:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-06-12 22:25:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 3495. [2021-06-12 22:25:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 3494 states have (on average 3.546937607326846) internal successors, (12393), 3494 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 12393 transitions. [2021-06-12 22:25:32,368 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 12393 transitions. Word has length 28 [2021-06-12 22:25:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:32,368 INFO L482 AbstractCegarLoop]: Abstraction has 3495 states and 12393 transitions. [2021-06-12 22:25:32,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 12393 transitions. [2021-06-12 22:25:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:32,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:32,375 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:32,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-12 22:25:32,597 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:32,598 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 82 times [2021-06-12 22:25:32,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:32,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886832651] [2021-06-12 22:25:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:32,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886832651] [2021-06-12 22:25:32,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886832651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:32,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161645914] [2021-06-12 22:25:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:32,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:32,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:32,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:32,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161645914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:32,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:32,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:25:32,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101000647] [2021-06-12 22:25:32,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:25:32,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:32,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:25:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:25:32,777 INFO L87 Difference]: Start difference. First operand 3495 states and 12393 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:33,763 INFO L93 Difference]: Finished difference Result 7385 states and 23848 transitions. [2021-06-12 22:25:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:25:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:33,775 INFO L225 Difference]: With dead ends: 7385 [2021-06-12 22:25:33,776 INFO L226 Difference]: Without dead ends: 7381 [2021-06-12 22:25:33,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 628.3ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:25:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-12 22:25:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 3430. [2021-06-12 22:25:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.5444736074657333) internal successors, (12154), 3429 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 12154 transitions. [2021-06-12 22:25:33,851 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 12154 transitions. Word has length 28 [2021-06-12 22:25:33,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:33,851 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 12154 transitions. [2021-06-12 22:25:33,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 12154 transitions. [2021-06-12 22:25:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:33,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:33,855 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:34,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:34,056 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:34,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 72 times [2021-06-12 22:25:34,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:34,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899056029] [2021-06-12 22:25:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899056029] [2021-06-12 22:25:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899056029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595928460] [2021-06-12 22:25:34,103 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:34,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:25:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595928460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:34,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:34,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:25:34,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407589884] [2021-06-12 22:25:34,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:34,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:34,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:34,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:34,206 INFO L87 Difference]: Start difference. First operand 3430 states and 12154 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:34,803 INFO L93 Difference]: Finished difference Result 6528 states and 21436 transitions. [2021-06-12 22:25:34,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:25:34,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-12 22:25:34,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:34,812 INFO L225 Difference]: With dead ends: 6528 [2021-06-12 22:25:34,812 INFO L226 Difference]: Without dead ends: 6528 [2021-06-12 22:25:34,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:25:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-12 22:25:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 3434. [2021-06-12 22:25:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.5461695310224295) internal successors, (12174), 3433 states have internal predecessors, (12174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 12174 transitions. [2021-06-12 22:25:34,872 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 12174 transitions. Word has length 28 [2021-06-12 22:25:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:34,872 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 12174 transitions. [2021-06-12 22:25:34,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 12174 transitions. [2021-06-12 22:25:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:34,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:34,876 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:35,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-12 22:25:35,077 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:35,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 73 times [2021-06-12 22:25:35,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:35,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817639853] [2021-06-12 22:25:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:35,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:35,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817639853] [2021-06-12 22:25:35,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817639853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:35,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731625984] [2021-06-12 22:25:35,117 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:35,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731625984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:35,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:35,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:25:35,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679626947] [2021-06-12 22:25:35,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:35,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:35,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:35,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:35,236 INFO L87 Difference]: Start difference. First operand 3434 states and 12174 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:35,988 INFO L93 Difference]: Finished difference Result 6993 states and 22735 transitions. [2021-06-12 22:25:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:25:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-12 22:25:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:36,000 INFO L225 Difference]: With dead ends: 6993 [2021-06-12 22:25:36,000 INFO L226 Difference]: Without dead ends: 6993 [2021-06-12 22:25:36,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:25:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2021-06-12 22:25:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 3448. [2021-06-12 22:25:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3447 states have (on average 3.543661154627212) internal successors, (12215), 3447 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 12215 transitions. [2021-06-12 22:25:36,110 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 12215 transitions. Word has length 28 [2021-06-12 22:25:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:36,110 INFO L482 AbstractCegarLoop]: Abstraction has 3448 states and 12215 transitions. [2021-06-12 22:25:36,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 12215 transitions. [2021-06-12 22:25:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:36,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:36,116 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:36,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:36,316 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:36,317 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 74 times [2021-06-12 22:25:36,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:36,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875472401] [2021-06-12 22:25:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:36,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:36,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875472401] [2021-06-12 22:25:36,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875472401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:36,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397535361] [2021-06-12 22:25:36,360 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:36,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:36,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:36,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:36,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397535361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:36,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:36,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:25:36,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860244716] [2021-06-12 22:25:36,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:36,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:36,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:36,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:36,472 INFO L87 Difference]: Start difference. First operand 3448 states and 12215 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:37,309 INFO L93 Difference]: Finished difference Result 7512 states and 24206 transitions. [2021-06-12 22:25:37,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:25:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-12 22:25:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:37,321 INFO L225 Difference]: With dead ends: 7512 [2021-06-12 22:25:37,321 INFO L226 Difference]: Without dead ends: 7512 [2021-06-12 22:25:37,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:25:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7512 states. [2021-06-12 22:25:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7512 to 3530. [2021-06-12 22:25:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3530 states, 3529 states have (on average 3.537546047038821) internal successors, (12484), 3529 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3530 states to 3530 states and 12484 transitions. [2021-06-12 22:25:37,394 INFO L78 Accepts]: Start accepts. Automaton has 3530 states and 12484 transitions. Word has length 28 [2021-06-12 22:25:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:37,395 INFO L482 AbstractCegarLoop]: Abstraction has 3530 states and 12484 transitions. [2021-06-12 22:25:37,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3530 states and 12484 transitions. [2021-06-12 22:25:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:37,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:37,399 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:37,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-12 22:25:37,599 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:37,599 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 75 times [2021-06-12 22:25:37,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:37,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81889593] [2021-06-12 22:25:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:37,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:37,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81889593] [2021-06-12 22:25:37,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81889593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:37,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158063483] [2021-06-12 22:25:37,634 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:37,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:25:37,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:37,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:37,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158063483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:37,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:37,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:25:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830493774] [2021-06-12 22:25:37,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:25:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:25:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:25:37,755 INFO L87 Difference]: Start difference. First operand 3530 states and 12484 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-06-12 22:25:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:38,310 INFO L93 Difference]: Finished difference Result 7330 states and 25000 transitions. [2021-06-12 22:25:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:25:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 28 [2021-06-12 22:25:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:38,321 INFO L225 Difference]: With dead ends: 7330 [2021-06-12 22:25:38,321 INFO L226 Difference]: Without dead ends: 7330 [2021-06-12 22:25:38,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:25:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-12 22:25:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4693. [2021-06-12 22:25:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 3.6579283887468033) internal successors, (17163), 4692 states have internal predecessors, (17163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 17163 transitions. [2021-06-12 22:25:38,411 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 17163 transitions. Word has length 28 [2021-06-12 22:25:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:38,411 INFO L482 AbstractCegarLoop]: Abstraction has 4693 states and 17163 transitions. [2021-06-12 22:25:38,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2021-06-12 22:25:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 17163 transitions. [2021-06-12 22:25:38,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:38,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:38,417 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:38,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:38,621 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 76 times [2021-06-12 22:25:38,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:38,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787078898] [2021-06-12 22:25:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:38,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:38,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787078898] [2021-06-12 22:25:38,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787078898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:38,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270145554] [2021-06-12 22:25:38,661 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:38,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:38,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:38,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:38,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270145554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:38,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:38,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:25:38,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946435604] [2021-06-12 22:25:38,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:38,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:38,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:38,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:38,758 INFO L87 Difference]: Start difference. First operand 4693 states and 17163 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:39,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:39,525 INFO L93 Difference]: Finished difference Result 8462 states and 28895 transitions. [2021-06-12 22:25:39,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:25:39,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-12 22:25:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:39,539 INFO L225 Difference]: With dead ends: 8462 [2021-06-12 22:25:39,539 INFO L226 Difference]: Without dead ends: 8458 [2021-06-12 22:25:39,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:25:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8458 states. [2021-06-12 22:25:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8458 to 4583. [2021-06-12 22:25:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 3.6682671322566565) internal successors, (16808), 4582 states have internal predecessors, (16808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 16808 transitions. [2021-06-12 22:25:39,639 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 16808 transitions. Word has length 28 [2021-06-12 22:25:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:39,639 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 16808 transitions. [2021-06-12 22:25:39,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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) [2021-06-12 22:25:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 16808 transitions. [2021-06-12 22:25:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:39,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:39,646 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:39,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable351 [2021-06-12 22:25:39,846 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:39,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 83 times [2021-06-12 22:25:39,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:39,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725206121] [2021-06-12 22:25:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:39,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725206121] [2021-06-12 22:25:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725206121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:39,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478567955] [2021-06-12 22:25:39,875 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:39,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:25:39,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:40,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478567955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:40,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:40,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:25:40,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731206568] [2021-06-12 22:25:40,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:40,030 INFO L87 Difference]: Start difference. First operand 4583 states and 16808 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:40,845 INFO L93 Difference]: Finished difference Result 9599 states and 32446 transitions. [2021-06-12 22:25:40,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:25:40,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:25:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:40,861 INFO L225 Difference]: With dead ends: 9599 [2021-06-12 22:25:40,861 INFO L226 Difference]: Without dead ends: 9587 [2021-06-12 22:25:40,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:25:40,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9587 states. [2021-06-12 22:25:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9587 to 5054. [2021-06-12 22:25:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5053 states have (on average 3.752226400158322) internal successors, (18960), 5053 states have internal predecessors, (18960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 18960 transitions. [2021-06-12 22:25:40,966 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 18960 transitions. Word has length 28 [2021-06-12 22:25:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:40,966 INFO L482 AbstractCegarLoop]: Abstraction has 5054 states and 18960 transitions. [2021-06-12 22:25:40,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 18960 transitions. [2021-06-12 22:25:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:40,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:40,972 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:41,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:41,173 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 84 times [2021-06-12 22:25:41,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:41,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724205561] [2021-06-12 22:25:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:41,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:41,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724205561] [2021-06-12 22:25:41,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724205561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:41,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003021202] [2021-06-12 22:25:41,200 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:41,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:25:41,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:41,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:41,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:41,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003021202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:41,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:41,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:25:41,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73514388] [2021-06-12 22:25:41,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:41,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:41,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:41,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:41,309 INFO L87 Difference]: Start difference. First operand 5054 states and 18960 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:42,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:42,142 INFO L93 Difference]: Finished difference Result 9931 states and 33478 transitions. [2021-06-12 22:25:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:25:42,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:25:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:42,157 INFO L225 Difference]: With dead ends: 9931 [2021-06-12 22:25:42,157 INFO L226 Difference]: Without dead ends: 9931 [2021-06-12 22:25:42,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:25:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9931 states. [2021-06-12 22:25:42,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9931 to 5074. [2021-06-12 22:25:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5073 states have (on average 3.737236349300217) internal successors, (18959), 5073 states have internal predecessors, (18959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 18959 transitions. [2021-06-12 22:25:42,266 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 18959 transitions. Word has length 28 [2021-06-12 22:25:42,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:42,266 INFO L482 AbstractCegarLoop]: Abstraction has 5074 states and 18959 transitions. [2021-06-12 22:25:42,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 18959 transitions. [2021-06-12 22:25:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:42,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:42,273 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:42,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-12 22:25:42,474 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 85 times [2021-06-12 22:25:42,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:42,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754829107] [2021-06-12 22:25:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:42,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:42,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754829107] [2021-06-12 22:25:42,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754829107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:42,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658677826] [2021-06-12 22:25:42,511 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:42,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:42,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:42,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658677826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:42,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:42,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:25:42,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330041045] [2021-06-12 22:25:42,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:25:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:25:42,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:25:42,608 INFO L87 Difference]: Start difference. First operand 5074 states and 18959 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:43,003 INFO L93 Difference]: Finished difference Result 9404 states and 33475 transitions. [2021-06-12 22:25:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:25:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:43,020 INFO L225 Difference]: With dead ends: 9404 [2021-06-12 22:25:43,021 INFO L226 Difference]: Without dead ends: 9321 [2021-06-12 22:25:43,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:25:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2021-06-12 22:25:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 6509. [2021-06-12 22:25:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.785341118623233) internal successors, (24635), 6508 states have internal predecessors, (24635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:43,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 24635 transitions. [2021-06-12 22:25:43,140 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 24635 transitions. Word has length 28 [2021-06-12 22:25:43,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:43,140 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 24635 transitions. [2021-06-12 22:25:43,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 24635 transitions. [2021-06-12 22:25:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:43,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:43,149 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:43,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable354,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:43,349 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:43,350 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 86 times [2021-06-12 22:25:43,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:43,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077291105] [2021-06-12 22:25:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:43,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:43,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077291105] [2021-06-12 22:25:43,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077291105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:43,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510964302] [2021-06-12 22:25:43,376 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:43,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:43,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:25:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:43,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510964302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:43,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:43,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:25:43,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672779974] [2021-06-12 22:25:43,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:25:43,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:43,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:25:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:25:43,456 INFO L87 Difference]: Start difference. First operand 6509 states and 24635 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 22:25:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:43,650 INFO L93 Difference]: Finished difference Result 8941 states and 31711 transitions. [2021-06-12 22:25:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:25:43,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-12 22:25:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:43,665 INFO L225 Difference]: With dead ends: 8941 [2021-06-12 22:25:43,665 INFO L226 Difference]: Without dead ends: 8941 [2021-06-12 22:25:43,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:25:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8941 states. [2021-06-12 22:25:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8941 to 6655. [2021-06-12 22:25:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6655 states, 6654 states have (on average 3.7639014126841) internal successors, (25045), 6654 states have internal predecessors, (25045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6655 states to 6655 states and 25045 transitions. [2021-06-12 22:25:43,779 INFO L78 Accepts]: Start accepts. Automaton has 6655 states and 25045 transitions. Word has length 28 [2021-06-12 22:25:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:43,779 INFO L482 AbstractCegarLoop]: Abstraction has 6655 states and 25045 transitions. [2021-06-12 22:25:43,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2021-06-12 22:25:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6655 states and 25045 transitions. [2021-06-12 22:25:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:43,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:43,789 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:43,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-12 22:25:43,993 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 87 times [2021-06-12 22:25:43,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:43,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487752983] [2021-06-12 22:25:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:44,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:44,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487752983] [2021-06-12 22:25:44,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487752983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:44,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335625638] [2021-06-12 22:25:44,034 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:44,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:25:44,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:44,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:44,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:44,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335625638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:44,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:44,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:25:44,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064775243] [2021-06-12 22:25:44,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:44,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:44,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:44,124 INFO L87 Difference]: Start difference. First operand 6655 states and 25045 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:44,825 INFO L93 Difference]: Finished difference Result 13667 states and 47756 transitions. [2021-06-12 22:25:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:25:44,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:44,851 INFO L225 Difference]: With dead ends: 13667 [2021-06-12 22:25:44,851 INFO L226 Difference]: Without dead ends: 13667 [2021-06-12 22:25:44,851 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:25:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13667 states. [2021-06-12 22:25:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13667 to 7331. [2021-06-12 22:25:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7331 states, 7330 states have (on average 3.781718963165075) internal successors, (27720), 7330 states have internal predecessors, (27720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7331 states to 7331 states and 27720 transitions. [2021-06-12 22:25:45,076 INFO L78 Accepts]: Start accepts. Automaton has 7331 states and 27720 transitions. Word has length 28 [2021-06-12 22:25:45,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:45,076 INFO L482 AbstractCegarLoop]: Abstraction has 7331 states and 27720 transitions. [2021-06-12 22:25:45,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:45,077 INFO L276 IsEmpty]: Start isEmpty. Operand 7331 states and 27720 transitions. [2021-06-12 22:25:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:45,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:45,086 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:45,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-12 22:25:45,286 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 88 times [2021-06-12 22:25:45,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:45,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736902107] [2021-06-12 22:25:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:45,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:45,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736902107] [2021-06-12 22:25:45,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736902107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:45,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035041372] [2021-06-12 22:25:45,326 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:45,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:45,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035041372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:45,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:45,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:25:45,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502372133] [2021-06-12 22:25:45,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:25:45,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:45,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:25:45,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:25:45,433 INFO L87 Difference]: Start difference. First operand 7331 states and 27720 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) [2021-06-12 22:25:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:46,067 INFO L93 Difference]: Finished difference Result 13813 states and 48320 transitions. [2021-06-12 22:25:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:25:46,067 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 28 [2021-06-12 22:25:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:46,092 INFO L225 Difference]: With dead ends: 13813 [2021-06-12 22:25:46,092 INFO L226 Difference]: Without dead ends: 13813 [2021-06-12 22:25:46,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:25:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13813 states. [2021-06-12 22:25:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13813 to 7615. [2021-06-12 22:25:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7615 states, 7614 states have (on average 3.7583399001838718) internal successors, (28616), 7614 states have internal predecessors, (28616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7615 states to 7615 states and 28616 transitions. [2021-06-12 22:25:46,260 INFO L78 Accepts]: Start accepts. Automaton has 7615 states and 28616 transitions. Word has length 28 [2021-06-12 22:25:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:46,261 INFO L482 AbstractCegarLoop]: Abstraction has 7615 states and 28616 transitions. [2021-06-12 22:25:46,261 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) [2021-06-12 22:25:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7615 states and 28616 transitions. [2021-06-12 22:25:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:46,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:46,272 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:46,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-12 22:25:46,473 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:46,473 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 89 times [2021-06-12 22:25:46,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:46,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54964009] [2021-06-12 22:25:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:46,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:46,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54964009] [2021-06-12 22:25:46,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54964009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:46,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178921756] [2021-06-12 22:25:46,501 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:46,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:25:46,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:46,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178921756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:46,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:46,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:25:46,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021597148] [2021-06-12 22:25:46,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:25:46,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:25:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:25:46,585 INFO L87 Difference]: Start difference. First operand 7615 states and 28616 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:25:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:46,951 INFO L93 Difference]: Finished difference Result 10157 states and 36733 transitions. [2021-06-12 22:25:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:25:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-12 22:25:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:46,968 INFO L225 Difference]: With dead ends: 10157 [2021-06-12 22:25:46,969 INFO L226 Difference]: Without dead ends: 10127 [2021-06-12 22:25:46,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:25:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10127 states. [2021-06-12 22:25:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10127 to 8471. [2021-06-12 22:25:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.7805194805194806) internal successors, (32021), 8470 states have internal predecessors, (32021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 32021 transitions. [2021-06-12 22:25:47,123 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 32021 transitions. Word has length 28 [2021-06-12 22:25:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:47,123 INFO L482 AbstractCegarLoop]: Abstraction has 8471 states and 32021 transitions. [2021-06-12 22:25:47,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:25:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 32021 transitions. [2021-06-12 22:25:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:47,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:47,135 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:47,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:47,336 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:47,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:47,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 90 times [2021-06-12 22:25:47,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:47,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083491643] [2021-06-12 22:25:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:47,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:47,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083491643] [2021-06-12 22:25:47,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083491643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:47,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168350226] [2021-06-12 22:25:47,363 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:47,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:25:47,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:47,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:47,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:47,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168350226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:47,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:47,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:25:47,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35162283] [2021-06-12 22:25:47,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:25:47,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:47,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:25:47,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:25:47,451 INFO L87 Difference]: Start difference. First operand 8471 states and 32021 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:25:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:47,795 INFO L93 Difference]: Finished difference Result 10767 states and 38758 transitions. [2021-06-12 22:25:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:25:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-12 22:25:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:47,815 INFO L225 Difference]: With dead ends: 10767 [2021-06-12 22:25:47,816 INFO L226 Difference]: Without dead ends: 10767 [2021-06-12 22:25:47,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:25:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10767 states. [2021-06-12 22:25:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10767 to 8511. [2021-06-12 22:25:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8511 states, 8510 states have (on average 3.7767332549941246) internal successors, (32140), 8510 states have internal predecessors, (32140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8511 states to 8511 states and 32140 transitions. [2021-06-12 22:25:47,974 INFO L78 Accepts]: Start accepts. Automaton has 8511 states and 32140 transitions. Word has length 28 [2021-06-12 22:25:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:47,974 INFO L482 AbstractCegarLoop]: Abstraction has 8511 states and 32140 transitions. [2021-06-12 22:25:47,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2021-06-12 22:25:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8511 states and 32140 transitions. [2021-06-12 22:25:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:47,987 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:47,987 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:48,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-12 22:25:48,187 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:48,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 91 times [2021-06-12 22:25:48,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:48,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628457023] [2021-06-12 22:25:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:48,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:48,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628457023] [2021-06-12 22:25:48,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628457023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:48,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584757024] [2021-06-12 22:25:48,276 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:25:48,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584757024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:48,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:48,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:25:48,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109855149] [2021-06-12 22:25:48,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:25:48,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:48,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:25:48,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:25:48,357 INFO L87 Difference]: Start difference. First operand 8511 states and 32140 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) [2021-06-12 22:25:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:48,948 INFO L93 Difference]: Finished difference Result 14516 states and 51666 transitions. [2021-06-12 22:25:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:25:48,949 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 28 [2021-06-12 22:25:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:48,976 INFO L225 Difference]: With dead ends: 14516 [2021-06-12 22:25:48,976 INFO L226 Difference]: Without dead ends: 14512 [2021-06-12 22:25:48,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:25:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14512 states. [2021-06-12 22:25:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14512 to 8415. [2021-06-12 22:25:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8415 states, 8414 states have (on average 3.7803660565723796) internal successors, (31808), 8414 states have internal predecessors, (31808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8415 states to 8415 states and 31808 transitions. [2021-06-12 22:25:49,167 INFO L78 Accepts]: Start accepts. Automaton has 8415 states and 31808 transitions. Word has length 28 [2021-06-12 22:25:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:49,167 INFO L482 AbstractCegarLoop]: Abstraction has 8415 states and 31808 transitions. [2021-06-12 22:25:49,167 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) [2021-06-12 22:25:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 8415 states and 31808 transitions. [2021-06-12 22:25:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:49,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:49,179 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:49,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:49,379 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 92 times [2021-06-12 22:25:49,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:49,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538545630] [2021-06-12 22:25:49,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:49,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:49,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538545630] [2021-06-12 22:25:49,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538545630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:49,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959161778] [2021-06-12 22:25:49,411 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:49,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:49,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:25:49,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:49,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959161778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:49,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:49,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:25:49,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940098440] [2021-06-12 22:25:49,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:25:49,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:49,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:25:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:25:49,529 INFO L87 Difference]: Start difference. First operand 8415 states and 31808 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:49,993 INFO L93 Difference]: Finished difference Result 10984 states and 39553 transitions. [2021-06-12 22:25:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:25:49,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:50,013 INFO L225 Difference]: With dead ends: 10984 [2021-06-12 22:25:50,013 INFO L226 Difference]: Without dead ends: 10984 [2021-06-12 22:25:50,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:25:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10984 states. [2021-06-12 22:25:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10984 to 8331. [2021-06-12 22:25:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7750300120048017) internal successors, (31446), 8330 states have internal predecessors, (31446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31446 transitions. [2021-06-12 22:25:50,168 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31446 transitions. Word has length 28 [2021-06-12 22:25:50,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:50,168 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31446 transitions. [2021-06-12 22:25:50,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31446 transitions. [2021-06-12 22:25:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:50,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:50,180 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:50,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:50,381 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 93 times [2021-06-12 22:25:50,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:50,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078421466] [2021-06-12 22:25:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:50,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:50,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078421466] [2021-06-12 22:25:50,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078421466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:50,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693211372] [2021-06-12 22:25:50,421 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:50,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:25:50,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:50,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:50,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693211372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:50,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:50,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:25:50,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203058036] [2021-06-12 22:25:50,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:25:50,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:50,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:25:50,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:25:50,505 INFO L87 Difference]: Start difference. First operand 8331 states and 31446 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:51,157 INFO L93 Difference]: Finished difference Result 14367 states and 51050 transitions. [2021-06-12 22:25:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:25:51,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:51,183 INFO L225 Difference]: With dead ends: 14367 [2021-06-12 22:25:51,183 INFO L226 Difference]: Without dead ends: 14355 [2021-06-12 22:25:51,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:25:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-12 22:25:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8331. [2021-06-12 22:25:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.7740696278511403) internal successors, (31438), 8330 states have internal predecessors, (31438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31438 transitions. [2021-06-12 22:25:51,404 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31438 transitions. Word has length 28 [2021-06-12 22:25:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:51,404 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31438 transitions. [2021-06-12 22:25:51,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31438 transitions. [2021-06-12 22:25:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:51,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:51,416 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:51,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:51,616 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 94 times [2021-06-12 22:25:51,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:51,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943663960] [2021-06-12 22:25:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:51,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:51,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943663960] [2021-06-12 22:25:51,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943663960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:51,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460050510] [2021-06-12 22:25:51,656 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:51,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:51,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:51,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460050510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:51,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:51,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:25:51,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328296352] [2021-06-12 22:25:51,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:51,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:51,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:51,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:51,756 INFO L87 Difference]: Start difference. First operand 8331 states and 31438 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:52,871 INFO L93 Difference]: Finished difference Result 22154 states and 77423 transitions. [2021-06-12 22:25:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:25:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:25:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:52,913 INFO L225 Difference]: With dead ends: 22154 [2021-06-12 22:25:52,913 INFO L226 Difference]: Without dead ends: 22154 [2021-06-12 22:25:52,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 694.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:25:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22154 states. [2021-06-12 22:25:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22154 to 11512. [2021-06-12 22:25:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11512 states, 11511 states have (on average 3.8206063765094256) internal successors, (43979), 11511 states have internal predecessors, (43979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11512 states to 11512 states and 43979 transitions. [2021-06-12 22:25:53,330 INFO L78 Accepts]: Start accepts. Automaton has 11512 states and 43979 transitions. Word has length 28 [2021-06-12 22:25:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:53,330 INFO L482 AbstractCegarLoop]: Abstraction has 11512 states and 43979 transitions. [2021-06-12 22:25:53,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 11512 states and 43979 transitions. [2021-06-12 22:25:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:53,347 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:53,347 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:53,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-12 22:25:53,547 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:53,548 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 95 times [2021-06-12 22:25:53,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:53,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118627782] [2021-06-12 22:25:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:53,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:53,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118627782] [2021-06-12 22:25:53,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118627782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:53,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62189861] [2021-06-12 22:25:53,588 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:53,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:25:53,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:53,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62189861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:53,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:53,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:25:53,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103997982] [2021-06-12 22:25:53,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:53,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:53,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:53,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:53,680 INFO L87 Difference]: Start difference. First operand 11512 states and 43979 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:54,817 INFO L93 Difference]: Finished difference Result 21281 states and 75167 transitions. [2021-06-12 22:25:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:25:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:25:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:54,862 INFO L225 Difference]: With dead ends: 21281 [2021-06-12 22:25:54,863 INFO L226 Difference]: Without dead ends: 21269 [2021-06-12 22:25:54,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:25:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21269 states. [2021-06-12 22:25:55,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21269 to 11342. [2021-06-12 22:25:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11342 states, 11341 states have (on average 3.8255885724362932) internal successors, (43386), 11341 states have internal predecessors, (43386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 43386 transitions. [2021-06-12 22:25:55,167 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 43386 transitions. Word has length 28 [2021-06-12 22:25:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:55,167 INFO L482 AbstractCegarLoop]: Abstraction has 11342 states and 43386 transitions. [2021-06-12 22:25:55,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 43386 transitions. [2021-06-12 22:25:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:55,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:55,183 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:55,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:55,384 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:55,384 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 96 times [2021-06-12 22:25:55,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:55,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323006521] [2021-06-12 22:25:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:55,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:55,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323006521] [2021-06-12 22:25:55,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323006521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:55,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20027227] [2021-06-12 22:25:55,433 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:55,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:25:55,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:55,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20027227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:55,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:55,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:25:55,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954562059] [2021-06-12 22:25:55,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:25:55,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:55,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:25:55,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:25:55,525 INFO L87 Difference]: Start difference. First operand 11342 states and 43386 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:56,577 INFO L93 Difference]: Finished difference Result 21160 states and 74599 transitions. [2021-06-12 22:25:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:25:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:25:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:56,619 INFO L225 Difference]: With dead ends: 21160 [2021-06-12 22:25:56,620 INFO L226 Difference]: Without dead ends: 21124 [2021-06-12 22:25:56,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 561.8ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:25:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21124 states. [2021-06-12 22:25:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21124 to 11386. [2021-06-12 22:25:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11386 states, 11385 states have (on average 3.824681598594642) internal successors, (43544), 11385 states have internal predecessors, (43544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11386 states to 11386 states and 43544 transitions. [2021-06-12 22:25:56,938 INFO L78 Accepts]: Start accepts. Automaton has 11386 states and 43544 transitions. Word has length 28 [2021-06-12 22:25:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:56,938 INFO L482 AbstractCegarLoop]: Abstraction has 11386 states and 43544 transitions. [2021-06-12 22:25:56,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:25:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11386 states and 43544 transitions. [2021-06-12 22:25:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:56,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:56,954 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:57,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-12 22:25:57,155 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:57,155 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 97 times [2021-06-12 22:25:57,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:57,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162843154] [2021-06-12 22:25:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:57,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:57,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162843154] [2021-06-12 22:25:57,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162843154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:57,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809812669] [2021-06-12 22:25:57,223 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:57,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:57,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809812669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:57,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:57,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:25:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770816121] [2021-06-12 22:25:57,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:25:57,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:25:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:25:57,365 INFO L87 Difference]: Start difference. First operand 11386 states and 43544 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:58,806 INFO L93 Difference]: Finished difference Result 20907 states and 73951 transitions. [2021-06-12 22:25:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:25:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:25:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:58,848 INFO L225 Difference]: With dead ends: 20907 [2021-06-12 22:25:58,848 INFO L226 Difference]: Without dead ends: 20907 [2021-06-12 22:25:58,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 927.2ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:25:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20907 states. [2021-06-12 22:25:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20907 to 11582. [2021-06-12 22:25:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11582 states, 11581 states have (on average 3.8160780588895604) internal successors, (44194), 11581 states have internal predecessors, (44194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11582 states to 11582 states and 44194 transitions. [2021-06-12 22:25:59,126 INFO L78 Accepts]: Start accepts. Automaton has 11582 states and 44194 transitions. Word has length 28 [2021-06-12 22:25:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:59,126 INFO L482 AbstractCegarLoop]: Abstraction has 11582 states and 44194 transitions. [2021-06-12 22:25:59,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 11582 states and 44194 transitions. [2021-06-12 22:25:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:25:59,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:59,142 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:59,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 22:25:59,343 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 98 times [2021-06-12 22:25:59,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:59,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141494653] [2021-06-12 22:25:59,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:59,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:59,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141494653] [2021-06-12 22:25:59,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141494653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:59,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000049293] [2021-06-12 22:25:59,383 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:59,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:59,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:59,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:25:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:59,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000049293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:59,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:59,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:25:59,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59647722] [2021-06-12 22:25:59,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:25:59,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:25:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:25:59,496 INFO L87 Difference]: Start difference. First operand 11582 states and 44194 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:00,807 INFO L93 Difference]: Finished difference Result 20368 states and 72482 transitions. [2021-06-12 22:26:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:26:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:00,853 INFO L225 Difference]: With dead ends: 20368 [2021-06-12 22:26:00,853 INFO L226 Difference]: Without dead ends: 20356 [2021-06-12 22:26:00,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 811.6ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:26:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-06-12 22:26:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 11460. [2021-06-12 22:26:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11460 states, 11459 states have (on average 3.8197923029932803) internal successors, (43771), 11459 states have internal predecessors, (43771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11460 states to 11460 states and 43771 transitions. [2021-06-12 22:26:01,142 INFO L78 Accepts]: Start accepts. Automaton has 11460 states and 43771 transitions. Word has length 28 [2021-06-12 22:26:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:01,142 INFO L482 AbstractCegarLoop]: Abstraction has 11460 states and 43771 transitions. [2021-06-12 22:26:01,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 11460 states and 43771 transitions. [2021-06-12 22:26:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:01,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:01,160 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:01,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-12 22:26:01,361 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 99 times [2021-06-12 22:26:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:01,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102986340] [2021-06-12 22:26:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:01,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:01,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102986340] [2021-06-12 22:26:01,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102986340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:01,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619872747] [2021-06-12 22:26:01,402 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:01,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:26:01,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:01,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:01,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:01,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619872747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:01,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:01,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:26:01,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059781199] [2021-06-12 22:26:01,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:26:01,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:01,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:26:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:26:01,505 INFO L87 Difference]: Start difference. First operand 11460 states and 43771 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:26:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:02,580 INFO L93 Difference]: Finished difference Result 19606 states and 70387 transitions. [2021-06-12 22:26:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:26:02,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:26:02,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:02,615 INFO L225 Difference]: With dead ends: 19606 [2021-06-12 22:26:02,615 INFO L226 Difference]: Without dead ends: 19570 [2021-06-12 22:26:02,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:26:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19570 states. [2021-06-12 22:26:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19570 to 11484. [2021-06-12 22:26:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.818775581294087) internal successors, (43851), 11483 states have internal predecessors, (43851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43851 transitions. [2021-06-12 22:26:02,870 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43851 transitions. Word has length 28 [2021-06-12 22:26:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:02,870 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43851 transitions. [2021-06-12 22:26:02,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:26:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43851 transitions. [2021-06-12 22:26:02,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:02,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:02,888 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:03,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-12 22:26:03,088 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:03,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 100 times [2021-06-12 22:26:03,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:03,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618044614] [2021-06-12 22:26:03,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:03,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:03,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618044614] [2021-06-12 22:26:03,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618044614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:03,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494154917] [2021-06-12 22:26:03,123 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:03,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:03,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494154917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:03,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:03,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:26:03,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919556550] [2021-06-12 22:26:03,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:03,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:03,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:03,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:03,250 INFO L87 Difference]: Start difference. First operand 11484 states and 43851 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:04,515 INFO L93 Difference]: Finished difference Result 28641 states and 102323 transitions. [2021-06-12 22:26:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 22:26:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:26:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:04,575 INFO L225 Difference]: With dead ends: 28641 [2021-06-12 22:26:04,575 INFO L226 Difference]: Without dead ends: 28641 [2021-06-12 22:26:04,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 757.9ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:26:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28641 states. [2021-06-12 22:26:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28641 to 11831. [2021-06-12 22:26:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11831 states, 11830 states have (on average 3.8459002535925615) internal successors, (45497), 11830 states have internal predecessors, (45497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11831 states to 11831 states and 45497 transitions. [2021-06-12 22:26:04,962 INFO L78 Accepts]: Start accepts. Automaton has 11831 states and 45497 transitions. Word has length 28 [2021-06-12 22:26:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:04,962 INFO L482 AbstractCegarLoop]: Abstraction has 11831 states and 45497 transitions. [2021-06-12 22:26:04,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 11831 states and 45497 transitions. [2021-06-12 22:26:04,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:04,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:04,978 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:05,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-06-12 22:26:05,179 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:05,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 101 times [2021-06-12 22:26:05,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:05,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774986877] [2021-06-12 22:26:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:05,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:05,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774986877] [2021-06-12 22:26:05,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774986877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:05,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005535564] [2021-06-12 22:26:05,216 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:05,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:26:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:05,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005535564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:05,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:05,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:26:05,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327448303] [2021-06-12 22:26:05,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:05,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:05,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:05,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:05,344 INFO L87 Difference]: Start difference. First operand 11831 states and 45497 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:06,579 INFO L93 Difference]: Finished difference Result 28095 states and 101100 transitions. [2021-06-12 22:26:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:26:06,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:26:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:06,646 INFO L225 Difference]: With dead ends: 28095 [2021-06-12 22:26:06,647 INFO L226 Difference]: Without dead ends: 28095 [2021-06-12 22:26:06,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 749.5ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:26:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28095 states. [2021-06-12 22:26:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28095 to 11720. [2021-06-12 22:26:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11720 states, 11719 states have (on average 3.833176892226299) internal successors, (44921), 11719 states have internal predecessors, (44921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 44921 transitions. [2021-06-12 22:26:07,074 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 44921 transitions. Word has length 28 [2021-06-12 22:26:07,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:07,074 INFO L482 AbstractCegarLoop]: Abstraction has 11720 states and 44921 transitions. [2021-06-12 22:26:07,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:07,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 44921 transitions. [2021-06-12 22:26:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:07,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:07,091 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:07,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-12 22:26:07,292 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 102 times [2021-06-12 22:26:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:07,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488852746] [2021-06-12 22:26:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:07,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:07,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488852746] [2021-06-12 22:26:07,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488852746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:07,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945972549] [2021-06-12 22:26:07,352 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:07,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:26:07,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:07,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:07,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945972549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:07,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:07,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:26:07,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858647859] [2021-06-12 22:26:07,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:26:07,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:26:07,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:26:07,472 INFO L87 Difference]: Start difference. First operand 11720 states and 44921 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-06-12 22:26:08,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:08,268 INFO L93 Difference]: Finished difference Result 22250 states and 80381 transitions. [2021-06-12 22:26:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:26:08,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 28 [2021-06-12 22:26:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:08,311 INFO L225 Difference]: With dead ends: 22250 [2021-06-12 22:26:08,311 INFO L226 Difference]: Without dead ends: 22250 [2021-06-12 22:26:08,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:26:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22250 states. [2021-06-12 22:26:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22250 to 11729. [2021-06-12 22:26:08,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11729 states, 11728 states have (on average 3.8321964529331516) internal successors, (44944), 11728 states have internal predecessors, (44944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11729 states to 11729 states and 44944 transitions. [2021-06-12 22:26:08,680 INFO L78 Accepts]: Start accepts. Automaton has 11729 states and 44944 transitions. Word has length 28 [2021-06-12 22:26:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:08,680 INFO L482 AbstractCegarLoop]: Abstraction has 11729 states and 44944 transitions. [2021-06-12 22:26:08,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-06-12 22:26:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 11729 states and 44944 transitions. [2021-06-12 22:26:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:08,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:08,699 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:08,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:08,900 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 103 times [2021-06-12 22:26:08,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:08,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051774696] [2021-06-12 22:26:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:08,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:08,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051774696] [2021-06-12 22:26:08,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051774696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:08,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406587132] [2021-06-12 22:26:08,938 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:08,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:09,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406587132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:09,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:09,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:26:09,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421791034] [2021-06-12 22:26:09,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:26:09,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:26:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:26:09,066 INFO L87 Difference]: Start difference. First operand 11729 states and 44944 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:26:09,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:09,887 INFO L93 Difference]: Finished difference Result 20609 states and 75141 transitions. [2021-06-12 22:26:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:26:09,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:26:09,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:09,930 INFO L225 Difference]: With dead ends: 20609 [2021-06-12 22:26:09,930 INFO L226 Difference]: Without dead ends: 20609 [2021-06-12 22:26:09,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:26:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20609 states. [2021-06-12 22:26:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20609 to 11741. [2021-06-12 22:26:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11741 states, 11740 states have (on average 3.831516183986371) internal successors, (44982), 11740 states have internal predecessors, (44982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11741 states to 11741 states and 44982 transitions. [2021-06-12 22:26:10,222 INFO L78 Accepts]: Start accepts. Automaton has 11741 states and 44982 transitions. Word has length 28 [2021-06-12 22:26:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:10,222 INFO L482 AbstractCegarLoop]: Abstraction has 11741 states and 44982 transitions. [2021-06-12 22:26:10,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:26:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 11741 states and 44982 transitions. [2021-06-12 22:26:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:10,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:10,240 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:10,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:10,441 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 104 times [2021-06-12 22:26:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:10,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486753885] [2021-06-12 22:26:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:10,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:10,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486753885] [2021-06-12 22:26:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486753885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:10,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370471737] [2021-06-12 22:26:10,481 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:10,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:10,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:10,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:10,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:10,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370471737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:10,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:10,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:26:10,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900820805] [2021-06-12 22:26:10,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:10,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:10,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:10,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:10,641 INFO L87 Difference]: Start difference. First operand 11741 states and 44982 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:11,881 INFO L93 Difference]: Finished difference Result 21392 states and 77378 transitions. [2021-06-12 22:26:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:26:11,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:11,926 INFO L225 Difference]: With dead ends: 21392 [2021-06-12 22:26:11,926 INFO L226 Difference]: Without dead ends: 21392 [2021-06-12 22:26:11,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 739.6ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:26:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21392 states. [2021-06-12 22:26:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21392 to 11849. [2021-06-12 22:26:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11849 states, 11848 states have (on average 3.824780553679946) internal successors, (45316), 11848 states have internal predecessors, (45316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11849 states to 11849 states and 45316 transitions. [2021-06-12 22:26:12,240 INFO L78 Accepts]: Start accepts. Automaton has 11849 states and 45316 transitions. Word has length 28 [2021-06-12 22:26:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:12,240 INFO L482 AbstractCegarLoop]: Abstraction has 11849 states and 45316 transitions. [2021-06-12 22:26:12,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 11849 states and 45316 transitions. [2021-06-12 22:26:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:12,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:12,258 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:12,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:12,458 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 105 times [2021-06-12 22:26:12,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:12,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021178644] [2021-06-12 22:26:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:12,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:12,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021178644] [2021-06-12 22:26:12,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021178644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:12,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17481919] [2021-06-12 22:26:12,498 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:12,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:26:12,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:12,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:12,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:12,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17481919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:12,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:12,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:26:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445825005] [2021-06-12 22:26:12,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:12,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:12,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:12,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:12,643 INFO L87 Difference]: Start difference. First operand 11849 states and 45316 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:13,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:13,783 INFO L93 Difference]: Finished difference Result 20773 states and 75674 transitions. [2021-06-12 22:26:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:26:13,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:13,824 INFO L225 Difference]: With dead ends: 20773 [2021-06-12 22:26:13,824 INFO L226 Difference]: Without dead ends: 20769 [2021-06-12 22:26:13,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 723.5ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:26:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20769 states. [2021-06-12 22:26:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20769 to 11775. [2021-06-12 22:26:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11775 states, 11774 states have (on average 3.8285204688296246) internal successors, (45077), 11774 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11775 states to 11775 states and 45077 transitions. [2021-06-12 22:26:14,181 INFO L78 Accepts]: Start accepts. Automaton has 11775 states and 45077 transitions. Word has length 28 [2021-06-12 22:26:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:14,181 INFO L482 AbstractCegarLoop]: Abstraction has 11775 states and 45077 transitions. [2021-06-12 22:26:14,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 11775 states and 45077 transitions. [2021-06-12 22:26:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:14,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:14,199 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:14,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:14,400 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 106 times [2021-06-12 22:26:14,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:14,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685760513] [2021-06-12 22:26:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:14,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:14,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685760513] [2021-06-12 22:26:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685760513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:14,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163801603] [2021-06-12 22:26:14,448 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:14,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:14,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:14,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163801603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:14,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:14,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:26:14,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463625852] [2021-06-12 22:26:14,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:14,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:14,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:14,590 INFO L87 Difference]: Start difference. First operand 11775 states and 45077 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:26:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:15,959 INFO L93 Difference]: Finished difference Result 20078 states and 72439 transitions. [2021-06-12 22:26:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:26:15,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:26:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:16,003 INFO L225 Difference]: With dead ends: 20078 [2021-06-12 22:26:16,003 INFO L226 Difference]: Without dead ends: 20078 [2021-06-12 22:26:16,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 866.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:26:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2021-06-12 22:26:16,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 12002. [2021-06-12 22:26:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 12001 states have (on average 3.8309307557703525) internal successors, (45975), 12001 states have internal predecessors, (45975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 45975 transitions. [2021-06-12 22:26:16,399 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 45975 transitions. Word has length 28 [2021-06-12 22:26:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:16,399 INFO L482 AbstractCegarLoop]: Abstraction has 12002 states and 45975 transitions. [2021-06-12 22:26:16,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:26:16,400 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 45975 transitions. [2021-06-12 22:26:16,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:16,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:16,423 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:16,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 22:26:16,645 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:16,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 107 times [2021-06-12 22:26:16,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:16,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199946504] [2021-06-12 22:26:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:16,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:16,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199946504] [2021-06-12 22:26:16,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199946504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:16,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609936423] [2021-06-12 22:26:16,694 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:16,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:26:16,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:16,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:16,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609936423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:16,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:16,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:26:16,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351113613] [2021-06-12 22:26:16,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:16,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:16,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:16,829 INFO L87 Difference]: Start difference. First operand 12002 states and 45975 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:26:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:17,998 INFO L93 Difference]: Finished difference Result 19609 states and 71148 transitions. [2021-06-12 22:26:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:26:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:26:17,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:18,036 INFO L225 Difference]: With dead ends: 19609 [2021-06-12 22:26:18,037 INFO L226 Difference]: Without dead ends: 19597 [2021-06-12 22:26:18,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:26:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-06-12 22:26:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 12104. [2021-06-12 22:26:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.825332562174667) internal successors, (46298), 12103 states have internal predecessors, (46298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 46298 transitions. [2021-06-12 22:26:18,324 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 46298 transitions. Word has length 28 [2021-06-12 22:26:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:18,324 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 46298 transitions. [2021-06-12 22:26:18,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:26:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 46298 transitions. [2021-06-12 22:26:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:18,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:18,343 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:18,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 22:26:18,543 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 77 times [2021-06-12 22:26:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:18,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227707748] [2021-06-12 22:26:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:18,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:18,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227707748] [2021-06-12 22:26:18,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227707748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:18,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690646938] [2021-06-12 22:26:18,593 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:18,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:26:18,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:18,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:18,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690646938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:18,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:18,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:26:18,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934832187] [2021-06-12 22:26:18,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:26:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:26:18,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:26:18,702 INFO L87 Difference]: Start difference. First operand 12104 states and 46298 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:26:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:19,280 INFO L93 Difference]: Finished difference Result 17019 states and 63218 transitions. [2021-06-12 22:26:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:26:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:26:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:19,321 INFO L225 Difference]: With dead ends: 17019 [2021-06-12 22:26:19,321 INFO L226 Difference]: Without dead ends: 17019 [2021-06-12 22:26:19,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:26:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17019 states. [2021-06-12 22:26:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17019 to 12176. [2021-06-12 22:26:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12176 states, 12175 states have (on average 3.820780287474333) internal successors, (46518), 12175 states have internal predecessors, (46518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12176 states to 12176 states and 46518 transitions. [2021-06-12 22:26:19,650 INFO L78 Accepts]: Start accepts. Automaton has 12176 states and 46518 transitions. Word has length 28 [2021-06-12 22:26:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:19,650 INFO L482 AbstractCegarLoop]: Abstraction has 12176 states and 46518 transitions. [2021-06-12 22:26:19,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:26:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 12176 states and 46518 transitions. [2021-06-12 22:26:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:19,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:19,672 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:19,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-12 22:26:19,893 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 78 times [2021-06-12 22:26:19,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:19,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54691715] [2021-06-12 22:26:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:19,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54691715] [2021-06-12 22:26:19,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54691715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700642550] [2021-06-12 22:26:19,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:19,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:26:19,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:19,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:20,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700642550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:20,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:20,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:26:20,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87705156] [2021-06-12 22:26:20,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:20,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:20,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:20,071 INFO L87 Difference]: Start difference. First operand 12176 states and 46518 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-12 22:26:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:20,540 INFO L93 Difference]: Finished difference Result 15313 states and 56647 transitions. [2021-06-12 22:26:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:26:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-12 22:26:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:20,574 INFO L225 Difference]: With dead ends: 15313 [2021-06-12 22:26:20,574 INFO L226 Difference]: Without dead ends: 15262 [2021-06-12 22:26:20,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:26:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15262 states. [2021-06-12 22:26:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15262 to 11819. [2021-06-12 22:26:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11819 states, 11818 states have (on average 3.8123201895413774) internal successors, (45054), 11818 states have internal predecessors, (45054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11819 states to 11819 states and 45054 transitions. [2021-06-12 22:26:20,809 INFO L78 Accepts]: Start accepts. Automaton has 11819 states and 45054 transitions. Word has length 28 [2021-06-12 22:26:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:20,809 INFO L482 AbstractCegarLoop]: Abstraction has 11819 states and 45054 transitions. [2021-06-12 22:26:20,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-12 22:26:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 11819 states and 45054 transitions. [2021-06-12 22:26:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:20,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:20,827 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:21,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-12 22:26:21,028 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:21,028 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 79 times [2021-06-12 22:26:21,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:21,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6034128] [2021-06-12 22:26:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:21,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:21,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6034128] [2021-06-12 22:26:21,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6034128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:21,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999322470] [2021-06-12 22:26:21,062 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:21,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999322470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:21,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:21,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:26:21,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742403837] [2021-06-12 22:26:21,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:26:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:26:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:26:21,150 INFO L87 Difference]: Start difference. First operand 11819 states and 45054 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:21,658 INFO L93 Difference]: Finished difference Result 17677 states and 64654 transitions. [2021-06-12 22:26:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:26:21,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:21,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:21,693 INFO L225 Difference]: With dead ends: 17677 [2021-06-12 22:26:21,694 INFO L226 Difference]: Without dead ends: 17677 [2021-06-12 22:26:21,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:26:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17677 states. [2021-06-12 22:26:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17677 to 12133. [2021-06-12 22:26:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12133 states, 12132 states have (on average 3.7958292120013186) internal successors, (46051), 12132 states have internal predecessors, (46051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12133 states to 12133 states and 46051 transitions. [2021-06-12 22:26:21,960 INFO L78 Accepts]: Start accepts. Automaton has 12133 states and 46051 transitions. Word has length 28 [2021-06-12 22:26:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:21,960 INFO L482 AbstractCegarLoop]: Abstraction has 12133 states and 46051 transitions. [2021-06-12 22:26:21,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 12133 states and 46051 transitions. [2021-06-12 22:26:21,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:21,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:21,977 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:22,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:22,178 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash -119803620, now seen corresponding path program 80 times [2021-06-12 22:26:22,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:22,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287259425] [2021-06-12 22:26:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:22,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:22,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287259425] [2021-06-12 22:26:22,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287259425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:22,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210292087] [2021-06-12 22:26:22,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:22,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:22,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:22,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:22,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210292087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:22,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:22,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:26:22,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370337383] [2021-06-12 22:26:22,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:22,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:22,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:22,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:22,332 INFO L87 Difference]: Start difference. First operand 12133 states and 46051 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-12 22:26:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:22,866 INFO L93 Difference]: Finished difference Result 16906 states and 62799 transitions. [2021-06-12 22:26:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:26:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-12 22:26:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:22,900 INFO L225 Difference]: With dead ends: 16906 [2021-06-12 22:26:22,900 INFO L226 Difference]: Without dead ends: 16896 [2021-06-12 22:26:22,900 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:26:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-06-12 22:26:23,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 14164. [2021-06-12 22:26:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14164 states, 14163 states have (on average 3.8308268022311656) internal successors, (54256), 14163 states have internal predecessors, (54256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14164 states to 14164 states and 54256 transitions. [2021-06-12 22:26:23,179 INFO L78 Accepts]: Start accepts. Automaton has 14164 states and 54256 transitions. Word has length 28 [2021-06-12 22:26:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:23,179 INFO L482 AbstractCegarLoop]: Abstraction has 14164 states and 54256 transitions. [2021-06-12 22:26:23,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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) [2021-06-12 22:26:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 14164 states and 54256 transitions. [2021-06-12 22:26:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:23,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:23,200 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-12 22:26:23,401 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 81 times [2021-06-12 22:26:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785235802] [2021-06-12 22:26:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:23,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:23,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785235802] [2021-06-12 22:26:23,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785235802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:23,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939320479] [2021-06-12 22:26:23,434 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:23,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:26:23,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:23,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939320479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:23,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:23,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:26:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358425739] [2021-06-12 22:26:23,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:26:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:26:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:26:23,516 INFO L87 Difference]: Start difference. First operand 14164 states and 54256 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:23,939 INFO L93 Difference]: Finished difference Result 19420 states and 72451 transitions. [2021-06-12 22:26:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:26:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:23,978 INFO L225 Difference]: With dead ends: 19420 [2021-06-12 22:26:23,978 INFO L226 Difference]: Without dead ends: 19412 [2021-06-12 22:26:23,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:26:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19412 states. [2021-06-12 22:26:24,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19412 to 14084. [2021-06-12 22:26:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14084 states, 14083 states have (on average 3.8335581907264076) internal successors, (53988), 14083 states have internal predecessors, (53988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14084 states to 14084 states and 53988 transitions. [2021-06-12 22:26:24,280 INFO L78 Accepts]: Start accepts. Automaton has 14084 states and 53988 transitions. Word has length 28 [2021-06-12 22:26:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:24,280 INFO L482 AbstractCegarLoop]: Abstraction has 14084 states and 53988 transitions. [2021-06-12 22:26:24,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 14084 states and 53988 transitions. [2021-06-12 22:26:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:24,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:24,301 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:24,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:24,501 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 82 times [2021-06-12 22:26:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:24,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329666451] [2021-06-12 22:26:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:24,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329666451] [2021-06-12 22:26:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329666451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53426466] [2021-06-12 22:26:24,541 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:24,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:24,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:24,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:24,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53426466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:24,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:24,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:26:24,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491747288] [2021-06-12 22:26:24,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:26:24,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:24,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:26:24,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:26:24,624 INFO L87 Difference]: Start difference. First operand 14084 states and 53988 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:26:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:25,111 INFO L93 Difference]: Finished difference Result 19300 states and 72099 transitions. [2021-06-12 22:26:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:26:25,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:26:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:25,150 INFO L225 Difference]: With dead ends: 19300 [2021-06-12 22:26:25,150 INFO L226 Difference]: Without dead ends: 19288 [2021-06-12 22:26:25,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:26:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19288 states. [2021-06-12 22:26:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19288 to 14050. [2021-06-12 22:26:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 3.835504306356324) internal successors, (53885), 14049 states have internal predecessors, (53885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 53885 transitions. [2021-06-12 22:26:25,429 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 53885 transitions. Word has length 28 [2021-06-12 22:26:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:25,429 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 53885 transitions. [2021-06-12 22:26:25,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:26:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 53885 transitions. [2021-06-12 22:26:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:25,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:25,449 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:25,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:25,650 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:25,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 83 times [2021-06-12 22:26:25,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:25,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050290318] [2021-06-12 22:26:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:25,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050290318] [2021-06-12 22:26:25,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050290318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26106843] [2021-06-12 22:26:25,686 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:25,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:26:25,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:25,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:25,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26106843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:25,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:25,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:26:25,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133047738] [2021-06-12 22:26:25,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:26:25,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:25,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:26:25,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:26:25,806 INFO L87 Difference]: Start difference. First operand 14050 states and 53885 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-12 22:26:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:26,761 INFO L93 Difference]: Finished difference Result 26192 states and 94663 transitions. [2021-06-12 22:26:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:26:26,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-06-12 22:26:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:26,820 INFO L225 Difference]: With dead ends: 26192 [2021-06-12 22:26:26,820 INFO L226 Difference]: Without dead ends: 26192 [2021-06-12 22:26:26,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:26:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26192 states. [2021-06-12 22:26:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26192 to 14026. [2021-06-12 22:26:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14026 states, 14025 states have (on average 3.834652406417112) internal successors, (53781), 14025 states have internal predecessors, (53781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14026 states to 14026 states and 53781 transitions. [2021-06-12 22:26:27,281 INFO L78 Accepts]: Start accepts. Automaton has 14026 states and 53781 transitions. Word has length 28 [2021-06-12 22:26:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:27,282 INFO L482 AbstractCegarLoop]: Abstraction has 14026 states and 53781 transitions. [2021-06-12 22:26:27,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-12 22:26:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 14026 states and 53781 transitions. [2021-06-12 22:26:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:27,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:27,304 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:27,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:27,509 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 108 times [2021-06-12 22:26:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:27,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228746750] [2021-06-12 22:26:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:27,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:27,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228746750] [2021-06-12 22:26:27,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228746750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:27,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021622910] [2021-06-12 22:26:27,539 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:27,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:26:27,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:27,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:27,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:27,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021622910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:27,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:27,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:26:27,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724940243] [2021-06-12 22:26:27,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:26:27,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:27,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:26:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:26:27,651 INFO L87 Difference]: Start difference. First operand 14026 states and 53781 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:28,361 INFO L93 Difference]: Finished difference Result 21930 states and 80131 transitions. [2021-06-12 22:26:28,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:26:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:28,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:28,404 INFO L225 Difference]: With dead ends: 21930 [2021-06-12 22:26:28,404 INFO L226 Difference]: Without dead ends: 21917 [2021-06-12 22:26:28,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:26:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21917 states. [2021-06-12 22:26:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21917 to 15540. [2021-06-12 22:26:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15540 states, 15539 states have (on average 3.8934294356136174) internal successors, (60500), 15539 states have internal predecessors, (60500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15540 states to 15540 states and 60500 transitions. [2021-06-12 22:26:28,760 INFO L78 Accepts]: Start accepts. Automaton has 15540 states and 60500 transitions. Word has length 28 [2021-06-12 22:26:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:28,760 INFO L482 AbstractCegarLoop]: Abstraction has 15540 states and 60500 transitions. [2021-06-12 22:26:28,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 15540 states and 60500 transitions. [2021-06-12 22:26:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:28,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:28,783 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:28,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:28,983 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:28,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 109 times [2021-06-12 22:26:28,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:28,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046652057] [2021-06-12 22:26:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:29,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:29,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046652057] [2021-06-12 22:26:29,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046652057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:29,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741708541] [2021-06-12 22:26:29,010 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:29,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:29,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741708541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:29,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:29,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:26:29,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412417746] [2021-06-12 22:26:29,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:26:29,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:29,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:26:29,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:26:29,126 INFO L87 Difference]: Start difference. First operand 15540 states and 60500 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:29,979 INFO L93 Difference]: Finished difference Result 22091 states and 80578 transitions. [2021-06-12 22:26:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:26:29,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:30,030 INFO L225 Difference]: With dead ends: 22091 [2021-06-12 22:26:30,030 INFO L226 Difference]: Without dead ends: 22076 [2021-06-12 22:26:30,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:26:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22076 states. [2021-06-12 22:26:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22076 to 15507. [2021-06-12 22:26:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15507 states, 15506 states have (on average 3.892428737262995) internal successors, (60356), 15506 states have internal predecessors, (60356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15507 states to 15507 states and 60356 transitions. [2021-06-12 22:26:30,450 INFO L78 Accepts]: Start accepts. Automaton has 15507 states and 60356 transitions. Word has length 28 [2021-06-12 22:26:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:30,450 INFO L482 AbstractCegarLoop]: Abstraction has 15507 states and 60356 transitions. [2021-06-12 22:26:30,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 15507 states and 60356 transitions. [2021-06-12 22:26:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:30,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:30,472 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:30,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:30,673 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:30,673 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 110 times [2021-06-12 22:26:30,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:30,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861977508] [2021-06-12 22:26:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:30,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:30,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861977508] [2021-06-12 22:26:30,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861977508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:30,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505791866] [2021-06-12 22:26:30,699 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:30,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:30,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:30,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505791866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:30,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:30,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:26:30,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935863206] [2021-06-12 22:26:30,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:26:30,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:30,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:26:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:26:30,800 INFO L87 Difference]: Start difference. First operand 15507 states and 60356 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:26:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:31,432 INFO L93 Difference]: Finished difference Result 25101 states and 91625 transitions. [2021-06-12 22:26:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:26:31,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:26:31,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:31,490 INFO L225 Difference]: With dead ends: 25101 [2021-06-12 22:26:31,491 INFO L226 Difference]: Without dead ends: 25088 [2021-06-12 22:26:31,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:26:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25088 states. [2021-06-12 22:26:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25088 to 15601. [2021-06-12 22:26:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15601 states, 15600 states have (on average 3.8981410256410256) internal successors, (60811), 15600 states have internal predecessors, (60811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15601 states to 15601 states and 60811 transitions. [2021-06-12 22:26:31,893 INFO L78 Accepts]: Start accepts. Automaton has 15601 states and 60811 transitions. Word has length 28 [2021-06-12 22:26:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:31,893 INFO L482 AbstractCegarLoop]: Abstraction has 15601 states and 60811 transitions. [2021-06-12 22:26:31,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:26:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 15601 states and 60811 transitions. [2021-06-12 22:26:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:31,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:31,918 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:32,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 22:26:32,118 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:32,119 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 111 times [2021-06-12 22:26:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:32,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086442722] [2021-06-12 22:26:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:32,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:32,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086442722] [2021-06-12 22:26:32,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086442722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:32,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769005645] [2021-06-12 22:26:32,145 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:32,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:26:32,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:32,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769005645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:32,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:32,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:26:32,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883568803] [2021-06-12 22:26:32,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:26:32,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:32,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:26:32,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:26:32,249 INFO L87 Difference]: Start difference. First operand 15601 states and 60811 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:26:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:32,991 INFO L93 Difference]: Finished difference Result 26885 states and 97285 transitions. [2021-06-12 22:26:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:26:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-12 22:26:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:33,044 INFO L225 Difference]: With dead ends: 26885 [2021-06-12 22:26:33,044 INFO L226 Difference]: Without dead ends: 26885 [2021-06-12 22:26:33,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:26:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26885 states. [2021-06-12 22:26:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26885 to 15654. [2021-06-12 22:26:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15654 states, 15653 states have (on average 3.894397240145659) internal successors, (60959), 15653 states have internal predecessors, (60959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 60959 transitions. [2021-06-12 22:26:33,477 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 60959 transitions. Word has length 28 [2021-06-12 22:26:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:33,477 INFO L482 AbstractCegarLoop]: Abstraction has 15654 states and 60959 transitions. [2021-06-12 22:26:33,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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) [2021-06-12 22:26:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 60959 transitions. [2021-06-12 22:26:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:33,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:33,501 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:33,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-12 22:26:33,702 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 84 times [2021-06-12 22:26:33,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:33,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889200259] [2021-06-12 22:26:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:33,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:33,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889200259] [2021-06-12 22:26:33,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889200259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:33,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998984859] [2021-06-12 22:26:33,741 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:33,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:26:33,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:33,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998984859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:33,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:33,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:26:33,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94445372] [2021-06-12 22:26:33,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:26:33,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:33,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:26:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:26:33,850 INFO L87 Difference]: Start difference. First operand 15654 states and 60959 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) 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) [2021-06-12 22:26:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:34,791 INFO L93 Difference]: Finished difference Result 26297 states and 97911 transitions. [2021-06-12 22:26:34,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:26:34,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) 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 28 [2021-06-12 22:26:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:34,856 INFO L225 Difference]: With dead ends: 26297 [2021-06-12 22:26:34,856 INFO L226 Difference]: Without dead ends: 26293 [2021-06-12 22:26:34,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 522.6ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:26:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26293 states. [2021-06-12 22:26:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26293 to 15950. [2021-06-12 22:26:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15950 states, 15949 states have (on average 3.8838171672205153) internal successors, (61943), 15949 states have internal predecessors, (61943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15950 states to 15950 states and 61943 transitions. [2021-06-12 22:26:35,354 INFO L78 Accepts]: Start accepts. Automaton has 15950 states and 61943 transitions. Word has length 28 [2021-06-12 22:26:35,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:35,354 INFO L482 AbstractCegarLoop]: Abstraction has 15950 states and 61943 transitions. [2021-06-12 22:26:35,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) 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) [2021-06-12 22:26:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 15950 states and 61943 transitions. [2021-06-12 22:26:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:35,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:35,378 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:35,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 22:26:35,578 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 112 times [2021-06-12 22:26:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:35,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791465501] [2021-06-12 22:26:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:35,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:35,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791465501] [2021-06-12 22:26:35,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791465501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:35,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743676200] [2021-06-12 22:26:35,609 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:35,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:35,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:35,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:35,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743676200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:35,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:35,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:26:35,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421483963] [2021-06-12 22:26:35,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:26:35,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:35,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:26:35,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:26:35,703 INFO L87 Difference]: Start difference. First operand 15950 states and 61943 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:36,340 INFO L93 Difference]: Finished difference Result 23295 states and 86571 transitions. [2021-06-12 22:26:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:26:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:36,384 INFO L225 Difference]: With dead ends: 23295 [2021-06-12 22:26:36,384 INFO L226 Difference]: Without dead ends: 23272 [2021-06-12 22:26:36,385 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:26:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23272 states. [2021-06-12 22:26:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23272 to 16091. [2021-06-12 22:26:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16091 states, 16090 states have (on average 3.89608452454941) internal successors, (62688), 16090 states have internal predecessors, (62688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16091 states to 16091 states and 62688 transitions. [2021-06-12 22:26:36,766 INFO L78 Accepts]: Start accepts. Automaton has 16091 states and 62688 transitions. Word has length 28 [2021-06-12 22:26:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:36,766 INFO L482 AbstractCegarLoop]: Abstraction has 16091 states and 62688 transitions. [2021-06-12 22:26:36,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 16091 states and 62688 transitions. [2021-06-12 22:26:36,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:36,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:36,790 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:36,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 22:26:36,990 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:36,990 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 113 times [2021-06-12 22:26:36,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:36,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309912935] [2021-06-12 22:26:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:37,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309912935] [2021-06-12 22:26:37,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309912935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:37,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825881211] [2021-06-12 22:26:37,021 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:37,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:26:37,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:37,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:37,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825881211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:37,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:37,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:26:37,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565573824] [2021-06-12 22:26:37,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:26:37,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:37,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:26:37,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:26:37,118 INFO L87 Difference]: Start difference. First operand 16091 states and 62688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:37,919 INFO L93 Difference]: Finished difference Result 22857 states and 83754 transitions. [2021-06-12 22:26:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:26:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:37,969 INFO L225 Difference]: With dead ends: 22857 [2021-06-12 22:26:37,969 INFO L226 Difference]: Without dead ends: 22857 [2021-06-12 22:26:37,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 410.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:26:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22857 states. [2021-06-12 22:26:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22857 to 16206. [2021-06-12 22:26:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16206 states, 16205 states have (on average 3.8883677877198397) internal successors, (63011), 16205 states have internal predecessors, (63011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16206 states to 16206 states and 63011 transitions. [2021-06-12 22:26:38,302 INFO L78 Accepts]: Start accepts. Automaton has 16206 states and 63011 transitions. Word has length 28 [2021-06-12 22:26:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:38,302 INFO L482 AbstractCegarLoop]: Abstraction has 16206 states and 63011 transitions. [2021-06-12 22:26:38,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 16206 states and 63011 transitions. [2021-06-12 22:26:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:38,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:38,325 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:38,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:38,525 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 114 times [2021-06-12 22:26:38,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:38,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802879693] [2021-06-12 22:26:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:38,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:38,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802879693] [2021-06-12 22:26:38,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802879693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:38,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743398056] [2021-06-12 22:26:38,556 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:38,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:26:38,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:38,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:38,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743398056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:38,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:38,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:26:38,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710921501] [2021-06-12 22:26:38,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:26:38,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:38,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:26:38,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:26:38,684 INFO L87 Difference]: Start difference. First operand 16206 states and 63011 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:39,349 INFO L93 Difference]: Finished difference Result 25358 states and 93325 transitions. [2021-06-12 22:26:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:26:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:39,403 INFO L225 Difference]: With dead ends: 25358 [2021-06-12 22:26:39,404 INFO L226 Difference]: Without dead ends: 25358 [2021-06-12 22:26:39,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:26:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25358 states. [2021-06-12 22:26:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25358 to 17371. [2021-06-12 22:26:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.8704663212435233) internal successors, (67230), 17370 states have internal predecessors, (67230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 67230 transitions. [2021-06-12 22:26:39,782 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 67230 transitions. Word has length 28 [2021-06-12 22:26:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:39,782 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 67230 transitions. [2021-06-12 22:26:39,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 67230 transitions. [2021-06-12 22:26:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:39,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:39,807 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:40,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:40,008 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:40,008 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 115 times [2021-06-12 22:26:40,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:40,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065127664] [2021-06-12 22:26:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:40,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:40,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065127664] [2021-06-12 22:26:40,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065127664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:40,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494443293] [2021-06-12 22:26:40,039 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:40,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:40,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:40,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494443293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:40,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:40,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:26:40,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368534960] [2021-06-12 22:26:40,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:26:40,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:40,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:26:40,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:26:40,139 INFO L87 Difference]: Start difference. First operand 17371 states and 67230 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) 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) [2021-06-12 22:26:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:41,090 INFO L93 Difference]: Finished difference Result 28661 states and 104016 transitions. [2021-06-12 22:26:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:26:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) 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 28 [2021-06-12 22:26:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:41,159 INFO L225 Difference]: With dead ends: 28661 [2021-06-12 22:26:41,159 INFO L226 Difference]: Without dead ends: 28661 [2021-06-12 22:26:41,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:26:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28661 states. [2021-06-12 22:26:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28661 to 17617. [2021-06-12 22:26:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17617 states, 17616 states have (on average 3.8848773841961854) internal successors, (68436), 17616 states have internal predecessors, (68436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17617 states to 17617 states and 68436 transitions. [2021-06-12 22:26:41,575 INFO L78 Accepts]: Start accepts. Automaton has 17617 states and 68436 transitions. Word has length 28 [2021-06-12 22:26:41,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:41,575 INFO L482 AbstractCegarLoop]: Abstraction has 17617 states and 68436 transitions. [2021-06-12 22:26:41,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) 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) [2021-06-12 22:26:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 17617 states and 68436 transitions. [2021-06-12 22:26:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:41,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:41,601 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:41,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-12 22:26:41,801 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 85 times [2021-06-12 22:26:41,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:41,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028543916] [2021-06-12 22:26:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:41,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028543916] [2021-06-12 22:26:41,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028543916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:41,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850368561] [2021-06-12 22:26:41,835 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:41,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:41,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850368561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:41,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:41,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:26:41,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614910771] [2021-06-12 22:26:41,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:41,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:41,983 INFO L87 Difference]: Start difference. First operand 17617 states and 68436 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:43,521 INFO L93 Difference]: Finished difference Result 45772 states and 165843 transitions. [2021-06-12 22:26:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:26:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:26:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:43,747 INFO L225 Difference]: With dead ends: 45772 [2021-06-12 22:26:43,747 INFO L226 Difference]: Without dead ends: 45772 [2021-06-12 22:26:43,747 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 916.9ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:26:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45772 states. [2021-06-12 22:26:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45772 to 18979. [2021-06-12 22:26:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18979 states, 18978 states have (on average 3.92285804615871) internal successors, (74448), 18978 states have internal predecessors, (74448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18979 states to 18979 states and 74448 transitions. [2021-06-12 22:26:44,340 INFO L78 Accepts]: Start accepts. Automaton has 18979 states and 74448 transitions. Word has length 28 [2021-06-12 22:26:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:44,341 INFO L482 AbstractCegarLoop]: Abstraction has 18979 states and 74448 transitions. [2021-06-12 22:26:44,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 18979 states and 74448 transitions. [2021-06-12 22:26:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:44,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:44,366 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:44,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:44,567 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 86 times [2021-06-12 22:26:44,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:44,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767018154] [2021-06-12 22:26:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:44,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767018154] [2021-06-12 22:26:44,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767018154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:44,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355805944] [2021-06-12 22:26:44,604 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:44,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:44,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:44,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:44,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355805944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:44,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:44,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:26:44,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441770365] [2021-06-12 22:26:44,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:44,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:44,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:44,729 INFO L87 Difference]: Start difference. First operand 18979 states and 74448 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:46,324 INFO L93 Difference]: Finished difference Result 44697 states and 163047 transitions. [2021-06-12 22:26:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:26:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:26:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:46,411 INFO L225 Difference]: With dead ends: 44697 [2021-06-12 22:26:46,412 INFO L226 Difference]: Without dead ends: 44697 [2021-06-12 22:26:46,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 887.6ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:26:46,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44697 states. [2021-06-12 22:26:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44697 to 18947. [2021-06-12 22:26:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18947 states, 18946 states have (on average 3.919771983532144) internal successors, (74264), 18946 states have internal predecessors, (74264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18947 states to 18947 states and 74264 transitions. [2021-06-12 22:26:47,059 INFO L78 Accepts]: Start accepts. Automaton has 18947 states and 74264 transitions. Word has length 28 [2021-06-12 22:26:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:47,059 INFO L482 AbstractCegarLoop]: Abstraction has 18947 states and 74264 transitions. [2021-06-12 22:26:47,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:26:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 18947 states and 74264 transitions. [2021-06-12 22:26:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:47,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:47,086 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:47,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:47,286 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 116 times [2021-06-12 22:26:47,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:47,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833855293] [2021-06-12 22:26:47,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:47,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833855293] [2021-06-12 22:26:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833855293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289937331] [2021-06-12 22:26:47,324 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:47,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:47,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:47,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:47,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289937331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:47,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:47,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:26:47,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233703159] [2021-06-12 22:26:47,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:26:47,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:47,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:26:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:26:47,403 INFO L87 Difference]: Start difference. First operand 18947 states and 74264 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 22:26:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:47,724 INFO L93 Difference]: Finished difference Result 30407 states and 117873 transitions. [2021-06-12 22:26:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:26:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-12 22:26:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:47,798 INFO L225 Difference]: With dead ends: 30407 [2021-06-12 22:26:47,798 INFO L226 Difference]: Without dead ends: 30360 [2021-06-12 22:26:47,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:26:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-06-12 22:26:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 24152. [2021-06-12 22:26:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.923150180116765) internal successors, (94748), 24151 states have internal predecessors, (94748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:48,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 94748 transitions. [2021-06-12 22:26:48,379 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 94748 transitions. Word has length 28 [2021-06-12 22:26:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:48,379 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 94748 transitions. [2021-06-12 22:26:48,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 22:26:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 94748 transitions. [2021-06-12 22:26:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:48,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:48,412 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:48,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:48,613 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 117 times [2021-06-12 22:26:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:48,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470357481] [2021-06-12 22:26:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:48,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:48,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470357481] [2021-06-12 22:26:48,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470357481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:48,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593877702] [2021-06-12 22:26:48,654 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:48,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:26:48,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:26:48,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:48,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593877702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:48,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:48,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:26:48,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370187021] [2021-06-12 22:26:48,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:26:48,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:48,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:26:48,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:26:48,753 INFO L87 Difference]: Start difference. First operand 24152 states and 94748 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) [2021-06-12 22:26:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:49,081 INFO L93 Difference]: Finished difference Result 26900 states and 103096 transitions. [2021-06-12 22:26:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:26:49,081 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 28 [2021-06-12 22:26:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:49,144 INFO L225 Difference]: With dead ends: 26900 [2021-06-12 22:26:49,144 INFO L226 Difference]: Without dead ends: 26900 [2021-06-12 22:26:49,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:26:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26900 states. [2021-06-12 22:26:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26900 to 23655. [2021-06-12 22:26:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23655 states, 23654 states have (on average 3.913756658493278) internal successors, (92576), 23654 states have internal predecessors, (92576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23655 states to 23655 states and 92576 transitions. [2021-06-12 22:26:49,617 INFO L78 Accepts]: Start accepts. Automaton has 23655 states and 92576 transitions. Word has length 28 [2021-06-12 22:26:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:49,617 INFO L482 AbstractCegarLoop]: Abstraction has 23655 states and 92576 transitions. [2021-06-12 22:26:49,617 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) [2021-06-12 22:26:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 23655 states and 92576 transitions. [2021-06-12 22:26:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:49,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:49,651 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:49,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:49,852 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 118 times [2021-06-12 22:26:49,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:49,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193724113] [2021-06-12 22:26:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:49,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193724113] [2021-06-12 22:26:49,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193724113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695375187] [2021-06-12 22:26:49,888 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:49,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:49,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:49,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:49,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695375187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:49,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:49,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:26:49,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733754006] [2021-06-12 22:26:49,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:26:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:49,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:26:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:26:49,997 INFO L87 Difference]: Start difference. First operand 23655 states and 92576 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:50,977 INFO L93 Difference]: Finished difference Result 36284 states and 135440 transitions. [2021-06-12 22:26:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:26:50,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:51,067 INFO L225 Difference]: With dead ends: 36284 [2021-06-12 22:26:51,068 INFO L226 Difference]: Without dead ends: 36284 [2021-06-12 22:26:51,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:26:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36284 states. [2021-06-12 22:26:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36284 to 23725. [2021-06-12 22:26:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23725 states, 23724 states have (on average 3.911819254763109) internal successors, (92804), 23724 states have internal predecessors, (92804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23725 states to 23725 states and 92804 transitions. [2021-06-12 22:26:51,680 INFO L78 Accepts]: Start accepts. Automaton has 23725 states and 92804 transitions. Word has length 28 [2021-06-12 22:26:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:51,680 INFO L482 AbstractCegarLoop]: Abstraction has 23725 states and 92804 transitions. [2021-06-12 22:26:51,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 23725 states and 92804 transitions. [2021-06-12 22:26:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:51,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:51,716 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:51,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:51,917 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 119 times [2021-06-12 22:26:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:51,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285593249] [2021-06-12 22:26:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:51,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285593249] [2021-06-12 22:26:51,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285593249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333899005] [2021-06-12 22:26:51,954 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:51,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:26:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:52,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333899005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:52,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:52,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:26:52,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434823024] [2021-06-12 22:26:52,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:52,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:52,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:52,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:52,101 INFO L87 Difference]: Start difference. First operand 23725 states and 92804 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:53,537 INFO L93 Difference]: Finished difference Result 46767 states and 172486 transitions. [2021-06-12 22:26:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:26:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:53,644 INFO L225 Difference]: With dead ends: 46767 [2021-06-12 22:26:53,644 INFO L226 Difference]: Without dead ends: 46767 [2021-06-12 22:26:53,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 871.1ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:26:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46767 states. [2021-06-12 22:26:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46767 to 23724. [2021-06-12 22:26:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23724 states, 23723 states have (on average 3.913670277789487) internal successors, (92844), 23723 states have internal predecessors, (92844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 92844 transitions. [2021-06-12 22:26:54,432 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 92844 transitions. Word has length 28 [2021-06-12 22:26:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:54,432 INFO L482 AbstractCegarLoop]: Abstraction has 23724 states and 92844 transitions. [2021-06-12 22:26:54,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 92844 transitions. [2021-06-12 22:26:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:54,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:54,466 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:54,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-12 22:26:54,666 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 120 times [2021-06-12 22:26:54,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:54,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090881061] [2021-06-12 22:26:54,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:54,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:54,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090881061] [2021-06-12 22:26:54,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090881061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:54,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957893493] [2021-06-12 22:26:54,704 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:54,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:26:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:26:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957893493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:54,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:54,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:26:54,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627352473] [2021-06-12 22:26:54,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:26:54,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:26:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:26:54,825 INFO L87 Difference]: Start difference. First operand 23724 states and 92844 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:56,344 INFO L93 Difference]: Finished difference Result 46491 states and 172131 transitions. [2021-06-12 22:26:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:26:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:26:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:56,460 INFO L225 Difference]: With dead ends: 46491 [2021-06-12 22:26:56,460 INFO L226 Difference]: Without dead ends: 46491 [2021-06-12 22:26:56,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 848.4ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:26:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46491 states. [2021-06-12 22:26:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46491 to 23508. [2021-06-12 22:26:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23508 states, 23507 states have (on average 3.9070064236184967) internal successors, (91842), 23507 states have internal predecessors, (91842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23508 states to 23508 states and 91842 transitions. [2021-06-12 22:26:57,139 INFO L78 Accepts]: Start accepts. Automaton has 23508 states and 91842 transitions. Word has length 28 [2021-06-12 22:26:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:57,139 INFO L482 AbstractCegarLoop]: Abstraction has 23508 states and 91842 transitions. [2021-06-12 22:26:57,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 23508 states and 91842 transitions. [2021-06-12 22:26:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:57,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:57,173 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:57,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-12 22:26:57,373 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 121 times [2021-06-12 22:26:57,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:57,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855422078] [2021-06-12 22:26:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:57,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:57,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855422078] [2021-06-12 22:26:57,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855422078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:57,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329555239] [2021-06-12 22:26:57,401 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:26:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:26:57,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329555239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:57,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:57,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:26:57,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437810601] [2021-06-12 22:26:57,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:26:57,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:57,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:26:57,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:26:57,485 INFO L87 Difference]: Start difference. First operand 23508 states and 91842 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:26:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:57,776 INFO L93 Difference]: Finished difference Result 35906 states and 134992 transitions. [2021-06-12 22:26:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:26:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-06-12 22:26:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:57,859 INFO L225 Difference]: With dead ends: 35906 [2021-06-12 22:26:57,860 INFO L226 Difference]: Without dead ends: 35889 [2021-06-12 22:26:57,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:26:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35889 states. [2021-06-12 22:26:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35889 to 23779. [2021-06-12 22:26:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23778 states have (on average 3.911514845655648) internal successors, (93008), 23778 states have internal predecessors, (93008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 93008 transitions. [2021-06-12 22:26:58,534 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 93008 transitions. Word has length 28 [2021-06-12 22:26:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:58,534 INFO L482 AbstractCegarLoop]: Abstraction has 23779 states and 93008 transitions. [2021-06-12 22:26:58,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:26:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 93008 transitions. [2021-06-12 22:26:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:58,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:58,570 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:58,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-12 22:26:58,771 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:58,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:58,771 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 122 times [2021-06-12 22:26:58,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:58,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149238339] [2021-06-12 22:26:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:26:58,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:58,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149238339] [2021-06-12 22:26:58,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149238339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:58,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284670001] [2021-06-12 22:26:58,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:58,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:58,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:26:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:26:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284670001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:58,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:58,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:26:58,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507442930] [2021-06-12 22:26:58,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:26:58,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:26:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:26:58,890 INFO L87 Difference]: Start difference. First operand 23779 states and 93008 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:26:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:59,202 INFO L93 Difference]: Finished difference Result 38100 states and 141941 transitions. [2021-06-12 22:26:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:26:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-06-12 22:26:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:59,295 INFO L225 Difference]: With dead ends: 38100 [2021-06-12 22:26:59,295 INFO L226 Difference]: Without dead ends: 38100 [2021-06-12 22:26:59,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:26:59,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38100 states. [2021-06-12 22:26:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38100 to 23448. [2021-06-12 22:26:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23448 states, 23447 states have (on average 3.8990915682176825) internal successors, (91422), 23447 states have internal predecessors, (91422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23448 states to 23448 states and 91422 transitions. [2021-06-12 22:26:59,833 INFO L78 Accepts]: Start accepts. Automaton has 23448 states and 91422 transitions. Word has length 28 [2021-06-12 22:26:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:59,833 INFO L482 AbstractCegarLoop]: Abstraction has 23448 states and 91422 transitions. [2021-06-12 22:26:59,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-06-12 22:26:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 23448 states and 91422 transitions. [2021-06-12 22:26:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:26:59,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:59,865 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:00,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-12 22:27:00,065 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 123 times [2021-06-12 22:27:00,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:00,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235123983] [2021-06-12 22:27:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:00,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:00,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235123983] [2021-06-12 22:27:00,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235123983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:00,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133087031] [2021-06-12 22:27:00,105 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:00,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:27:00,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:00,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133087031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:00,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:00,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:27:00,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387318089] [2021-06-12 22:27:00,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:27:00,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:00,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:27:00,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:27:00,205 INFO L87 Difference]: Start difference. First operand 23448 states and 91422 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:27:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:01,084 INFO L93 Difference]: Finished difference Result 33419 states and 125361 transitions. [2021-06-12 22:27:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:27:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:27:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:01,168 INFO L225 Difference]: With dead ends: 33419 [2021-06-12 22:27:01,168 INFO L226 Difference]: Without dead ends: 33419 [2021-06-12 22:27:01,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:27:01,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33419 states. [2021-06-12 22:27:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33419 to 23496. [2021-06-12 22:27:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23496 states, 23495 states have (on average 3.8977654820174505) internal successors, (91578), 23495 states have internal predecessors, (91578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 91578 transitions. [2021-06-12 22:27:01,745 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 91578 transitions. Word has length 28 [2021-06-12 22:27:01,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:01,745 INFO L482 AbstractCegarLoop]: Abstraction has 23496 states and 91578 transitions. [2021-06-12 22:27:01,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:27:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 91578 transitions. [2021-06-12 22:27:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:01,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:01,778 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:01,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-12 22:27:01,979 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:01,979 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 124 times [2021-06-12 22:27:01,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:01,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282197850] [2021-06-12 22:27:01,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:02,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:02,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282197850] [2021-06-12 22:27:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282197850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:02,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73947442] [2021-06-12 22:27:02,016 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:02,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:27:02,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73947442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:02,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:02,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:27:02,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187818755] [2021-06-12 22:27:02,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:27:02,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:02,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:27:02,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:27:02,115 INFO L87 Difference]: Start difference. First operand 23496 states and 91578 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:27:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:03,096 INFO L93 Difference]: Finished difference Result 35119 states and 130293 transitions. [2021-06-12 22:27:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:27:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:27:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:03,178 INFO L225 Difference]: With dead ends: 35119 [2021-06-12 22:27:03,179 INFO L226 Difference]: Without dead ends: 35119 [2021-06-12 22:27:03,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:27:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35119 states. [2021-06-12 22:27:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35119 to 24060. [2021-06-12 22:27:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24060 states, 24059 states have (on average 3.878964212976433) internal successors, (93324), 24059 states have internal predecessors, (93324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24060 states to 24060 states and 93324 transitions. [2021-06-12 22:27:03,920 INFO L78 Accepts]: Start accepts. Automaton has 24060 states and 93324 transitions. Word has length 28 [2021-06-12 22:27:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:03,920 INFO L482 AbstractCegarLoop]: Abstraction has 24060 states and 93324 transitions. [2021-06-12 22:27:03,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:27:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24060 states and 93324 transitions. [2021-06-12 22:27:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:03,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:03,956 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:04,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:04,157 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:04,157 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 125 times [2021-06-12 22:27:04,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:04,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235932446] [2021-06-12 22:27:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:04,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:04,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235932446] [2021-06-12 22:27:04,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235932446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:04,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805359169] [2021-06-12 22:27:04,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:04,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:27:04,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:04,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:04,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805359169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:04,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:04,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:27:04,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510409063] [2021-06-12 22:27:04,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:27:04,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:04,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:27:04,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:27:04,299 INFO L87 Difference]: Start difference. First operand 24060 states and 93324 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:27:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:05,136 INFO L93 Difference]: Finished difference Result 34157 states and 127778 transitions. [2021-06-12 22:27:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:27:05,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:27:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:05,215 INFO L225 Difference]: With dead ends: 34157 [2021-06-12 22:27:05,215 INFO L226 Difference]: Without dead ends: 34153 [2021-06-12 22:27:05,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:27:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34153 states. [2021-06-12 22:27:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34153 to 23952. [2021-06-12 22:27:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23952 states, 23951 states have (on average 3.8814245751743144) internal successors, (92964), 23951 states have internal predecessors, (92964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23952 states to 23952 states and 92964 transitions. [2021-06-12 22:27:06,166 INFO L78 Accepts]: Start accepts. Automaton has 23952 states and 92964 transitions. Word has length 28 [2021-06-12 22:27:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:06,166 INFO L482 AbstractCegarLoop]: Abstraction has 23952 states and 92964 transitions. [2021-06-12 22:27:06,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:27:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 23952 states and 92964 transitions. [2021-06-12 22:27:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:06,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:06,200 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:06,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-12 22:27:06,401 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 126 times [2021-06-12 22:27:06,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:06,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980481763] [2021-06-12 22:27:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:06,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:06,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980481763] [2021-06-12 22:27:06,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980481763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:06,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958154500] [2021-06-12 22:27:06,517 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:06,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:27:06,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:06,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:27:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:27:06,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958154500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:06,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:06,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:27:06,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123001249] [2021-06-12 22:27:06,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:27:06,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:06,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:27:06,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:27:06,598 INFO L87 Difference]: Start difference. First operand 23952 states and 92964 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:06,934 INFO L93 Difference]: Finished difference Result 30321 states and 113570 transitions. [2021-06-12 22:27:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:27:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:27:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:07,009 INFO L225 Difference]: With dead ends: 30321 [2021-06-12 22:27:07,010 INFO L226 Difference]: Without dead ends: 30321 [2021-06-12 22:27:07,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:27:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30321 states. [2021-06-12 22:27:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30321 to 24262. [2021-06-12 22:27:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24262 states, 24261 states have (on average 3.8735831169366475) internal successors, (93977), 24261 states have internal predecessors, (93977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24262 states to 24262 states and 93977 transitions. [2021-06-12 22:27:07,584 INFO L78 Accepts]: Start accepts. Automaton has 24262 states and 93977 transitions. Word has length 28 [2021-06-12 22:27:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:07,584 INFO L482 AbstractCegarLoop]: Abstraction has 24262 states and 93977 transitions. [2021-06-12 22:27:07,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24262 states and 93977 transitions. [2021-06-12 22:27:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:07,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:07,730 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:07,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:07,930 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 127 times [2021-06-12 22:27:07,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:07,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548817329] [2021-06-12 22:27:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:07,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548817329] [2021-06-12 22:27:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548817329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835640734] [2021-06-12 22:27:07,967 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:27:08,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835640734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:08,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:08,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:27:08,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151210978] [2021-06-12 22:27:08,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:27:08,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:08,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:27:08,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:27:08,055 INFO L87 Difference]: Start difference. First operand 24262 states and 93977 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:27:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:08,970 INFO L93 Difference]: Finished difference Result 35215 states and 130243 transitions. [2021-06-12 22:27:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:27:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:27:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:09,064 INFO L225 Difference]: With dead ends: 35215 [2021-06-12 22:27:09,064 INFO L226 Difference]: Without dead ends: 35215 [2021-06-12 22:27:09,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:27:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35215 states. [2021-06-12 22:27:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35215 to 26047. [2021-06-12 22:27:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26047 states, 26046 states have (on average 3.8823235813560624) internal successors, (101119), 26046 states have internal predecessors, (101119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26047 states to 26047 states and 101119 transitions. [2021-06-12 22:27:09,842 INFO L78 Accepts]: Start accepts. Automaton has 26047 states and 101119 transitions. Word has length 28 [2021-06-12 22:27:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:09,842 INFO L482 AbstractCegarLoop]: Abstraction has 26047 states and 101119 transitions. [2021-06-12 22:27:09,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:27:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 26047 states and 101119 transitions. [2021-06-12 22:27:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:09,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:09,878 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:10,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:10,078 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:10,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:10,079 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 128 times [2021-06-12 22:27:10,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:10,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976792382] [2021-06-12 22:27:10,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:10,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:10,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976792382] [2021-06-12 22:27:10,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976792382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:10,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429413634] [2021-06-12 22:27:10,114 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:10,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:27:10,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:10,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:27:10,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429413634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:10,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:10,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:27:10,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208858734] [2021-06-12 22:27:10,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:27:10,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:10,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:27:10,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:27:10,308 INFO L87 Difference]: Start difference. First operand 26047 states and 101119 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:27:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:11,067 INFO L93 Difference]: Finished difference Result 33427 states and 125631 transitions. [2021-06-12 22:27:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:27:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:27:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:11,151 INFO L225 Difference]: With dead ends: 33427 [2021-06-12 22:27:11,151 INFO L226 Difference]: Without dead ends: 33415 [2021-06-12 22:27:11,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:27:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33415 states. [2021-06-12 22:27:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33415 to 26213. [2021-06-12 22:27:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26213 states, 26212 states have (on average 3.8773081031588585) internal successors, (101632), 26212 states have internal predecessors, (101632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26213 states to 26213 states and 101632 transitions. [2021-06-12 22:27:11,941 INFO L78 Accepts]: Start accepts. Automaton has 26213 states and 101632 transitions. Word has length 28 [2021-06-12 22:27:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:11,941 INFO L482 AbstractCegarLoop]: Abstraction has 26213 states and 101632 transitions. [2021-06-12 22:27:11,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:27:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 26213 states and 101632 transitions. [2021-06-12 22:27:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:11,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:11,978 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:12,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:12,178 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:12,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 129 times [2021-06-12 22:27:12,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:12,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988479362] [2021-06-12 22:27:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:12,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988479362] [2021-06-12 22:27:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988479362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646235715] [2021-06-12 22:27:12,207 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:12,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:27:12,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:27:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:12,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646235715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:12,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:12,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:27:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758628836] [2021-06-12 22:27:12,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:27:12,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:12,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:27:12,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:27:12,298 INFO L87 Difference]: Start difference. First operand 26213 states and 101632 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-12 22:27:12,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:12,672 INFO L93 Difference]: Finished difference Result 30773 states and 117208 transitions. [2021-06-12 22:27:12,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:27:12,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-06-12 22:27:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:12,745 INFO L225 Difference]: With dead ends: 30773 [2021-06-12 22:27:12,745 INFO L226 Difference]: Without dead ends: 30773 [2021-06-12 22:27:12,745 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:27:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30773 states. [2021-06-12 22:27:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30773 to 27420. [2021-06-12 22:27:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27420 states, 27419 states have (on average 3.8735183631788175) internal successors, (106208), 27419 states have internal predecessors, (106208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27420 states to 27420 states and 106208 transitions. [2021-06-12 22:27:13,389 INFO L78 Accepts]: Start accepts. Automaton has 27420 states and 106208 transitions. Word has length 28 [2021-06-12 22:27:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:13,389 INFO L482 AbstractCegarLoop]: Abstraction has 27420 states and 106208 transitions. [2021-06-12 22:27:13,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-06-12 22:27:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 27420 states and 106208 transitions. [2021-06-12 22:27:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:13,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:13,437 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:13,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-12 22:27:13,638 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 130 times [2021-06-12 22:27:13,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:13,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510252908] [2021-06-12 22:27:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:13,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510252908] [2021-06-12 22:27:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510252908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520025321] [2021-06-12 22:27:13,836 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:13,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:27:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:13,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520025321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:13,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:13,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:27:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943415587] [2021-06-12 22:27:13,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:27:13,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:27:13,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:27:13,925 INFO L87 Difference]: Start difference. First operand 27420 states and 106208 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:27:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:14,769 INFO L93 Difference]: Finished difference Result 35583 states and 132544 transitions. [2021-06-12 22:27:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:27:14,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:27:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:14,846 INFO L225 Difference]: With dead ends: 35583 [2021-06-12 22:27:14,846 INFO L226 Difference]: Without dead ends: 35583 [2021-06-12 22:27:14,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:27:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35583 states. [2021-06-12 22:27:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35583 to 28674. [2021-06-12 22:27:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28674 states, 28673 states have (on average 3.842116276636557) internal successors, (110165), 28673 states have internal predecessors, (110165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28674 states to 28674 states and 110165 transitions. [2021-06-12 22:27:15,669 INFO L78 Accepts]: Start accepts. Automaton has 28674 states and 110165 transitions. Word has length 28 [2021-06-12 22:27:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:15,669 INFO L482 AbstractCegarLoop]: Abstraction has 28674 states and 110165 transitions. [2021-06-12 22:27:15,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:27:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 28674 states and 110165 transitions. [2021-06-12 22:27:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:15,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:15,730 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:15,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:15,930 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:15,931 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 131 times [2021-06-12 22:27:15,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:15,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115599703] [2021-06-12 22:27:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:15,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:15,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115599703] [2021-06-12 22:27:15,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115599703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:15,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353515382] [2021-06-12 22:27:15,966 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:15,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:27:15,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:15,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:16,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353515382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:16,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:16,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:27:16,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643658584] [2021-06-12 22:27:16,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:27:16,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:27:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:27:16,054 INFO L87 Difference]: Start difference. First operand 28674 states and 110165 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:16,805 INFO L93 Difference]: Finished difference Result 34707 states and 130204 transitions. [2021-06-12 22:27:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:27:16,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:27:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:16,880 INFO L225 Difference]: With dead ends: 34707 [2021-06-12 22:27:16,880 INFO L226 Difference]: Without dead ends: 34699 [2021-06-12 22:27:16,880 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:27:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34699 states. [2021-06-12 22:27:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34699 to 28480. [2021-06-12 22:27:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28480 states, 28479 states have (on average 3.847958144597774) internal successors, (109586), 28479 states have internal predecessors, (109586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:17,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28480 states to 28480 states and 109586 transitions. [2021-06-12 22:27:17,550 INFO L78 Accepts]: Start accepts. Automaton has 28480 states and 109586 transitions. Word has length 28 [2021-06-12 22:27:17,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:17,550 INFO L482 AbstractCegarLoop]: Abstraction has 28480 states and 109586 transitions. [2021-06-12 22:27:17,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:17,551 INFO L276 IsEmpty]: Start isEmpty. Operand 28480 states and 109586 transitions. [2021-06-12 22:27:17,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:17,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:17,594 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:17,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-12 22:27:17,795 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:17,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 132 times [2021-06-12 22:27:17,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:17,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377168272] [2021-06-12 22:27:17,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:17,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:17,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377168272] [2021-06-12 22:27:17,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377168272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:17,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003161132] [2021-06-12 22:27:17,827 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:17,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:27:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:17,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:17,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:17,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003161132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:17,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:17,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:27:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478995998] [2021-06-12 22:27:17,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:27:17,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:17,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:27:17,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:27:17,912 INFO L87 Difference]: Start difference. First operand 28480 states and 109586 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:18,783 INFO L93 Difference]: Finished difference Result 36567 states and 135873 transitions. [2021-06-12 22:27:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:27:18,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:27:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:18,886 INFO L225 Difference]: With dead ends: 36567 [2021-06-12 22:27:18,886 INFO L226 Difference]: Without dead ends: 36567 [2021-06-12 22:27:18,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:27:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36567 states. [2021-06-12 22:27:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36567 to 29508. [2021-06-12 22:27:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29508 states, 29507 states have (on average 3.8260073880774055) internal successors, (112894), 29507 states have internal predecessors, (112894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:19,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29508 states to 29508 states and 112894 transitions. [2021-06-12 22:27:19,644 INFO L78 Accepts]: Start accepts. Automaton has 29508 states and 112894 transitions. Word has length 28 [2021-06-12 22:27:19,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:19,645 INFO L482 AbstractCegarLoop]: Abstraction has 29508 states and 112894 transitions. [2021-06-12 22:27:19,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 29508 states and 112894 transitions. [2021-06-12 22:27:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:19,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:19,696 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:19,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 22:27:19,901 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 133 times [2021-06-12 22:27:19,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:19,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755981716] [2021-06-12 22:27:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:19,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:19,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755981716] [2021-06-12 22:27:19,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755981716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:19,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428741897] [2021-06-12 22:27:19,944 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:20,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:27:20,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428741897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:20,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:20,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:27:20,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742156349] [2021-06-12 22:27:20,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:27:20,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:20,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:27:20,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:27:20,372 INFO L87 Difference]: Start difference. First operand 29508 states and 112894 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) [2021-06-12 22:27:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:20,851 INFO L93 Difference]: Finished difference Result 35843 states and 136177 transitions. [2021-06-12 22:27:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:27:20,851 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 28 [2021-06-12 22:27:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:20,950 INFO L225 Difference]: With dead ends: 35843 [2021-06-12 22:27:20,950 INFO L226 Difference]: Without dead ends: 35830 [2021-06-12 22:27:20,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:27:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35830 states. [2021-06-12 22:27:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35830 to 34303. [2021-06-12 22:27:21,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34303 states, 34302 states have (on average 3.8411171360270537) internal successors, (131758), 34302 states have internal predecessors, (131758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34303 states to 34303 states and 131758 transitions. [2021-06-12 22:27:21,877 INFO L78 Accepts]: Start accepts. Automaton has 34303 states and 131758 transitions. Word has length 28 [2021-06-12 22:27:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:21,877 INFO L482 AbstractCegarLoop]: Abstraction has 34303 states and 131758 transitions. [2021-06-12 22:27:21,877 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) [2021-06-12 22:27:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 34303 states and 131758 transitions. [2021-06-12 22:27:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:21,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:21,936 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:22,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-12 22:27:22,137 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 134 times [2021-06-12 22:27:22,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:22,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038357748] [2021-06-12 22:27:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:22,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:22,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038357748] [2021-06-12 22:27:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038357748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:22,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88773645] [2021-06-12 22:27:22,179 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:22,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:27:22,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:27:22,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:22,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88773645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:22,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:22,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:27:22,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779138310] [2021-06-12 22:27:22,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:27:22,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:22,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:27:22,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:27:22,275 INFO L87 Difference]: Start difference. First operand 34303 states and 131758 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) [2021-06-12 22:27:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:23,174 INFO L93 Difference]: Finished difference Result 37460 states and 141660 transitions. [2021-06-12 22:27:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:27:23,175 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 28 [2021-06-12 22:27:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:23,290 INFO L225 Difference]: With dead ends: 37460 [2021-06-12 22:27:23,290 INFO L226 Difference]: Without dead ends: 37460 [2021-06-12 22:27:23,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:27:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37460 states. [2021-06-12 22:27:24,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37460 to 33980. [2021-06-12 22:27:24,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33980 states, 33979 states have (on average 3.8373995703228463) internal successors, (130391), 33979 states have internal predecessors, (130391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33980 states to 33980 states and 130391 transitions. [2021-06-12 22:27:24,787 INFO L78 Accepts]: Start accepts. Automaton has 33980 states and 130391 transitions. Word has length 28 [2021-06-12 22:27:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:24,787 INFO L482 AbstractCegarLoop]: Abstraction has 33980 states and 130391 transitions. [2021-06-12 22:27:24,787 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) [2021-06-12 22:27:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33980 states and 130391 transitions. [2021-06-12 22:27:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:24,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:24,858 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:25,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:25,077 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 135 times [2021-06-12 22:27:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:25,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523169236] [2021-06-12 22:27:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:25,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:25,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523169236] [2021-06-12 22:27:25,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523169236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:25,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654583690] [2021-06-12 22:27:25,113 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:25,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:27:25,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:25,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:25,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:25,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654583690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:25,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:25,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:27:25,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943431808] [2021-06-12 22:27:25,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:27:25,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:27:25,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:27:25,211 INFO L87 Difference]: Start difference. First operand 33980 states and 130391 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:25,986 INFO L93 Difference]: Finished difference Result 40756 states and 152783 transitions. [2021-06-12 22:27:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:27:25,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:27:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:26,087 INFO L225 Difference]: With dead ends: 40756 [2021-06-12 22:27:26,087 INFO L226 Difference]: Without dead ends: 40748 [2021-06-12 22:27:26,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:27:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40748 states. [2021-06-12 22:27:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40748 to 33946. [2021-06-12 22:27:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33946 states, 33945 states have (on average 3.8377964354102225) internal successors, (130274), 33945 states have internal predecessors, (130274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33946 states to 33946 states and 130274 transitions. [2021-06-12 22:27:26,964 INFO L78 Accepts]: Start accepts. Automaton has 33946 states and 130274 transitions. Word has length 28 [2021-06-12 22:27:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:26,964 INFO L482 AbstractCegarLoop]: Abstraction has 33946 states and 130274 transitions. [2021-06-12 22:27:26,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 33946 states and 130274 transitions. [2021-06-12 22:27:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:27,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:27,211 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:27,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 22:27:27,412 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 136 times [2021-06-12 22:27:27,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:27,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612111890] [2021-06-12 22:27:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:27,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:27,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612111890] [2021-06-12 22:27:27,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612111890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:27,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512229270] [2021-06-12 22:27:27,454 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:27,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:27:27,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:27,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:27:27,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:27,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512229270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:27,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:27,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:27:27,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793310198] [2021-06-12 22:27:27,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:27:27,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:27,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:27:27,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:27:27,543 INFO L87 Difference]: Start difference. First operand 33946 states and 130274 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) [2021-06-12 22:27:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:28,087 INFO L93 Difference]: Finished difference Result 36862 states and 139999 transitions. [2021-06-12 22:27:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:27:28,088 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 28 [2021-06-12 22:27:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:28,191 INFO L225 Difference]: With dead ends: 36862 [2021-06-12 22:27:28,192 INFO L226 Difference]: Without dead ends: 36862 [2021-06-12 22:27:28,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:27:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36862 states. [2021-06-12 22:27:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36862 to 34478. [2021-06-12 22:27:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34478 states, 34477 states have (on average 3.8361226324796243) internal successors, (132258), 34477 states have internal predecessors, (132258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34478 states to 34478 states and 132258 transitions. [2021-06-12 22:27:29,304 INFO L78 Accepts]: Start accepts. Automaton has 34478 states and 132258 transitions. Word has length 28 [2021-06-12 22:27:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:29,304 INFO L482 AbstractCegarLoop]: Abstraction has 34478 states and 132258 transitions. [2021-06-12 22:27:29,305 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) [2021-06-12 22:27:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 34478 states and 132258 transitions. [2021-06-12 22:27:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:29,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:29,363 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:29,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:29,563 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:29,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:29,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 137 times [2021-06-12 22:27:29,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:29,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294672066] [2021-06-12 22:27:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:29,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:29,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294672066] [2021-06-12 22:27:29,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294672066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:29,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479197442] [2021-06-12 22:27:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:29,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:27:29,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:29,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:29,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:27:29,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479197442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:29,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:29,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:27:29,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169873101] [2021-06-12 22:27:29,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:27:29,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:29,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:27:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:27:29,689 INFO L87 Difference]: Start difference. First operand 34478 states and 132258 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:30,441 INFO L93 Difference]: Finished difference Result 41641 states and 156125 transitions. [2021-06-12 22:27:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:27:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:27:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:30,537 INFO L225 Difference]: With dead ends: 41641 [2021-06-12 22:27:30,537 INFO L226 Difference]: Without dead ends: 41617 [2021-06-12 22:27:30,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:27:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41617 states. [2021-06-12 22:27:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41617 to 34650. [2021-06-12 22:27:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34650 states, 34649 states have (on average 3.832491558197928) internal successors, (132792), 34649 states have internal predecessors, (132792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34650 states to 34650 states and 132792 transitions. [2021-06-12 22:27:31,581 INFO L78 Accepts]: Start accepts. Automaton has 34650 states and 132792 transitions. Word has length 28 [2021-06-12 22:27:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:31,581 INFO L482 AbstractCegarLoop]: Abstraction has 34650 states and 132792 transitions. [2021-06-12 22:27:31,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:31,581 INFO L276 IsEmpty]: Start isEmpty. Operand 34650 states and 132792 transitions. [2021-06-12 22:27:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:31,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:31,634 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:31,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-12 22:27:31,835 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:31,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:31,835 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 138 times [2021-06-12 22:27:31,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:31,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358558402] [2021-06-12 22:27:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:31,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:31,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358558402] [2021-06-12 22:27:31,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358558402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:31,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710811739] [2021-06-12 22:27:31,873 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:31,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:27:31,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:27:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:31,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710811739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:31,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:31,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 22:27:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272570404] [2021-06-12 22:27:31,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:27:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:27:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:27:31,949 INFO L87 Difference]: Start difference. First operand 34650 states and 132792 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 22:27:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:32,464 INFO L93 Difference]: Finished difference Result 37282 states and 141492 transitions. [2021-06-12 22:27:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:27:32,464 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-12 22:27:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:32,728 INFO L225 Difference]: With dead ends: 37282 [2021-06-12 22:27:32,728 INFO L226 Difference]: Without dead ends: 37282 [2021-06-12 22:27:32,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:27:32,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37282 states. [2021-06-12 22:27:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37282 to 34576. [2021-06-12 22:27:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34576 states, 34575 states have (on average 3.833289949385394) internal successors, (132536), 34575 states have internal predecessors, (132536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34576 states to 34576 states and 132536 transitions. [2021-06-12 22:27:33,475 INFO L78 Accepts]: Start accepts. Automaton has 34576 states and 132536 transitions. Word has length 28 [2021-06-12 22:27:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:33,475 INFO L482 AbstractCegarLoop]: Abstraction has 34576 states and 132536 transitions. [2021-06-12 22:27:33,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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) [2021-06-12 22:27:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 34576 states and 132536 transitions. [2021-06-12 22:27:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:33,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:33,528 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:33,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:33,729 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 139 times [2021-06-12 22:27:33,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:33,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394832963] [2021-06-12 22:27:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:33,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:33,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394832963] [2021-06-12 22:27:33,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394832963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:33,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679272742] [2021-06-12 22:27:33,767 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:33,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679272742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:33,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:33,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:27:33,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395448917] [2021-06-12 22:27:33,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:27:33,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:33,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:27:33,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:27:33,847 INFO L87 Difference]: Start difference. First operand 34576 states and 132536 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:27:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:34,697 INFO L93 Difference]: Finished difference Result 41564 states and 155866 transitions. [2021-06-12 22:27:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:27:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-12 22:27:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:34,793 INFO L225 Difference]: With dead ends: 41564 [2021-06-12 22:27:34,793 INFO L226 Difference]: Without dead ends: 41524 [2021-06-12 22:27:34,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:27:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41524 states. [2021-06-12 22:27:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41524 to 34750. [2021-06-12 22:27:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34750 states, 34749 states have (on average 3.829549051771274) internal successors, (133073), 34749 states have internal predecessors, (133073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34750 states to 34750 states and 133073 transitions. [2021-06-12 22:27:35,853 INFO L78 Accepts]: Start accepts. Automaton has 34750 states and 133073 transitions. Word has length 28 [2021-06-12 22:27:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:35,853 INFO L482 AbstractCegarLoop]: Abstraction has 34750 states and 133073 transitions. [2021-06-12 22:27:35,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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) [2021-06-12 22:27:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 34750 states and 133073 transitions. [2021-06-12 22:27:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:35,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:35,911 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:36,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-12 22:27:36,112 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:36,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 140 times [2021-06-12 22:27:36,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:36,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434175645] [2021-06-12 22:27:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:36,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:36,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434175645] [2021-06-12 22:27:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434175645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:36,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689405219] [2021-06-12 22:27:36,148 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:36,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:27:36,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:36,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:36,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:36,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689405219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:36,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:36,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:27:36,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554007149] [2021-06-12 22:27:36,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:27:36,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:36,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:27:36,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:27:36,284 INFO L87 Difference]: Start difference. First operand 34750 states and 133073 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:27:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:37,688 INFO L93 Difference]: Finished difference Result 77130 states and 285331 transitions. [2021-06-12 22:27:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:27:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:27:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:37,881 INFO L225 Difference]: With dead ends: 77130 [2021-06-12 22:27:37,881 INFO L226 Difference]: Without dead ends: 77130 [2021-06-12 22:27:37,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:27:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77130 states. [2021-06-12 22:27:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77130 to 43844. [2021-06-12 22:27:39,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43844 states, 43843 states have (on average 3.9042264443582786) internal successors, (171173), 43843 states have internal predecessors, (171173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43844 states to 43844 states and 171173 transitions. [2021-06-12 22:27:39,573 INFO L78 Accepts]: Start accepts. Automaton has 43844 states and 171173 transitions. Word has length 28 [2021-06-12 22:27:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:39,573 INFO L482 AbstractCegarLoop]: Abstraction has 43844 states and 171173 transitions. [2021-06-12 22:27:39,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:27:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 43844 states and 171173 transitions. [2021-06-12 22:27:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:39,644 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:39,644 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:39,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:39,845 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:39,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 141 times [2021-06-12 22:27:39,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:39,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275223127] [2021-06-12 22:27:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:39,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275223127] [2021-06-12 22:27:39,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275223127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:39,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017297461] [2021-06-12 22:27:39,895 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:39,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:27:39,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:40,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017297461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:40,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:40,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:27:40,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140938547] [2021-06-12 22:27:40,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:27:40,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:27:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:27:40,019 INFO L87 Difference]: Start difference. First operand 43844 states and 171173 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:27:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:41,659 INFO L93 Difference]: Finished difference Result 76528 states and 283739 transitions. [2021-06-12 22:27:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:27:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-12 22:27:41,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:41,870 INFO L225 Difference]: With dead ends: 76528 [2021-06-12 22:27:41,870 INFO L226 Difference]: Without dead ends: 76528 [2021-06-12 22:27:41,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 831.7ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:27:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76528 states. [2021-06-12 22:27:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76528 to 43841. [2021-06-12 22:27:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43841 states, 43840 states have (on average 3.9041742700729927) internal successors, (171159), 43840 states have internal predecessors, (171159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43841 states to 43841 states and 171159 transitions. [2021-06-12 22:27:43,320 INFO L78 Accepts]: Start accepts. Automaton has 43841 states and 171159 transitions. Word has length 28 [2021-06-12 22:27:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:43,320 INFO L482 AbstractCegarLoop]: Abstraction has 43841 states and 171159 transitions. [2021-06-12 22:27:43,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2021-06-12 22:27:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 43841 states and 171159 transitions. [2021-06-12 22:27:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:43,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:43,392 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:43,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:43,592 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 142 times [2021-06-12 22:27:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:43,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748028760] [2021-06-12 22:27:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:43,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:43,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748028760] [2021-06-12 22:27:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748028760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:43,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492114846] [2021-06-12 22:27:43,624 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:43,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:27:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:43,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:43,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492114846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:43,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:43,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:27:43,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880413972] [2021-06-12 22:27:43,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:27:43,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:27:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:27:43,737 INFO L87 Difference]: Start difference. First operand 43841 states and 171159 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:27:44,053 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-06-12 22:27:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:45,380 INFO L93 Difference]: Finished difference Result 71140 states and 265637 transitions. [2021-06-12 22:27:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:27:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:27:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:45,562 INFO L225 Difference]: With dead ends: 71140 [2021-06-12 22:27:45,562 INFO L226 Difference]: Without dead ends: 71140 [2021-06-12 22:27:45,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 834.3ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:27:45,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71140 states. [2021-06-12 22:27:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71140 to 43865. [2021-06-12 22:27:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.9044090826190043) internal successors, (171263), 43864 states have internal predecessors, (171263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171263 transitions. [2021-06-12 22:27:47,020 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171263 transitions. Word has length 28 [2021-06-12 22:27:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:47,020 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171263 transitions. [2021-06-12 22:27:47,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:27:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171263 transitions. [2021-06-12 22:27:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:47,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:47,084 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:47,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-12 22:27:47,285 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 143 times [2021-06-12 22:27:47,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:47,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206880083] [2021-06-12 22:27:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:47,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:47,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206880083] [2021-06-12 22:27:47,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206880083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:47,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423629762] [2021-06-12 22:27:47,316 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:47,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:27:47,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:47,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:47,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423629762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:47,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:47,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:27:47,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724224696] [2021-06-12 22:27:47,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:27:47,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:27:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:27:47,667 INFO L87 Difference]: Start difference. First operand 43865 states and 171263 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:27:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:49,011 INFO L93 Difference]: Finished difference Result 70268 states and 263382 transitions. [2021-06-12 22:27:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:27:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:27:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:49,191 INFO L225 Difference]: With dead ends: 70268 [2021-06-12 22:27:49,192 INFO L226 Difference]: Without dead ends: 70260 [2021-06-12 22:27:49,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:27:49,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70260 states. [2021-06-12 22:27:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70260 to 43865. [2021-06-12 22:27:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43864 states have (on average 3.904272296188218) internal successors, (171257), 43864 states have internal predecessors, (171257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 171257 transitions. [2021-06-12 22:27:50,673 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 171257 transitions. Word has length 28 [2021-06-12 22:27:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:50,673 INFO L482 AbstractCegarLoop]: Abstraction has 43865 states and 171257 transitions. [2021-06-12 22:27:50,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:27:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 171257 transitions. [2021-06-12 22:27:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:50,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:50,738 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:50,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-12 22:27:50,939 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 144 times [2021-06-12 22:27:50,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:50,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894139077] [2021-06-12 22:27:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:50,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894139077] [2021-06-12 22:27:50,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894139077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:50,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78443817] [2021-06-12 22:27:50,970 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:50,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:27:50,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:50,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:51,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78443817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:51,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:51,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:27:51,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960721393] [2021-06-12 22:27:51,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:27:51,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:27:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:27:51,308 INFO L87 Difference]: Start difference. First operand 43865 states and 171257 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:52,790 INFO L93 Difference]: Finished difference Result 69775 states and 262075 transitions. [2021-06-12 22:27:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:27:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:27:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:53,050 INFO L225 Difference]: With dead ends: 69775 [2021-06-12 22:27:53,051 INFO L226 Difference]: Without dead ends: 69775 [2021-06-12 22:27:53,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 784.5ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:27:53,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69775 states. [2021-06-12 22:27:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69775 to 43873. [2021-06-12 22:27:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9043353391684903) internal successors, (171291), 43872 states have internal predecessors, (171291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171291 transitions. [2021-06-12 22:27:54,518 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171291 transitions. Word has length 28 [2021-06-12 22:27:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:54,518 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171291 transitions. [2021-06-12 22:27:54,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171291 transitions. [2021-06-12 22:27:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:54,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:54,583 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:54,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-12 22:27:54,784 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:54,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:54,784 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 145 times [2021-06-12 22:27:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:54,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431799793] [2021-06-12 22:27:54,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:54,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:54,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431799793] [2021-06-12 22:27:54,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431799793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:54,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444407934] [2021-06-12 22:27:54,816 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:54,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:55,111 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 22:27:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:55,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444407934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:55,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:55,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:27:55,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520034868] [2021-06-12 22:27:55,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:27:55,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:27:55,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:27:55,157 INFO L87 Difference]: Start difference. First operand 43873 states and 171291 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:56,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:56,444 INFO L93 Difference]: Finished difference Result 69542 states and 261491 transitions. [2021-06-12 22:27:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:27:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:27:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:27:56,633 INFO L225 Difference]: With dead ends: 69542 [2021-06-12 22:27:56,633 INFO L226 Difference]: Without dead ends: 69534 [2021-06-12 22:27:56,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:27:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69534 states. [2021-06-12 22:27:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69534 to 43873. [2021-06-12 22:27:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43873 states, 43872 states have (on average 3.9042897520058353) internal successors, (171289), 43872 states have internal predecessors, (171289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43873 states to 43873 states and 171289 transitions. [2021-06-12 22:27:58,119 INFO L78 Accepts]: Start accepts. Automaton has 43873 states and 171289 transitions. Word has length 28 [2021-06-12 22:27:58,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:27:58,119 INFO L482 AbstractCegarLoop]: Abstraction has 43873 states and 171289 transitions. [2021-06-12 22:27:58,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:27:58,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43873 states and 171289 transitions. [2021-06-12 22:27:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:27:58,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:27:58,184 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:27:58,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-12 22:27:58,389 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:27:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:27:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 146 times [2021-06-12 22:27:58,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:27:58,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180422270] [2021-06-12 22:27:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:27:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:27:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:58,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:27:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180422270] [2021-06-12 22:27:58,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180422270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043296571] [2021-06-12 22:27:58,426 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:27:58,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:27:58,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:27:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:27:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:27:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:27:58,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043296571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:27:58,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:27:58,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:27:58,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042989249] [2021-06-12 22:27:58,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:27:58,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:27:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:27:58,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:27:58,532 INFO L87 Difference]: Start difference. First operand 43873 states and 171289 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:27:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:27:59,928 INFO L93 Difference]: Finished difference Result 69043 states and 258242 transitions. [2021-06-12 22:27:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:27:59,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:27:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:00,357 INFO L225 Difference]: With dead ends: 69043 [2021-06-12 22:28:00,357 INFO L226 Difference]: Without dead ends: 69043 [2021-06-12 22:28:00,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 614.2ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:28:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69043 states. [2021-06-12 22:28:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69043 to 47103. [2021-06-12 22:28:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47103 states, 47102 states have (on average 3.907965691478069) internal successors, (184073), 47102 states have internal predecessors, (184073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47103 states to 47103 states and 184073 transitions. [2021-06-12 22:28:01,760 INFO L78 Accepts]: Start accepts. Automaton has 47103 states and 184073 transitions. Word has length 28 [2021-06-12 22:28:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:01,761 INFO L482 AbstractCegarLoop]: Abstraction has 47103 states and 184073 transitions. [2021-06-12 22:28:01,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:28:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 47103 states and 184073 transitions. [2021-06-12 22:28:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:01,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:01,830 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:02,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-12 22:28:02,030 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 147 times [2021-06-12 22:28:02,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:02,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787277271] [2021-06-12 22:28:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:02,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:02,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787277271] [2021-06-12 22:28:02,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787277271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:02,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142069946] [2021-06-12 22:28:02,062 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:02,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:28:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:02,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:02,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142069946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:02,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:02,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:28:02,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93334877] [2021-06-12 22:28:02,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:28:02,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:28:02,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:28:02,161 INFO L87 Difference]: Start difference. First operand 47103 states and 184073 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:28:02,619 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 22:28:03,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:03,407 INFO L93 Difference]: Finished difference Result 68545 states and 256931 transitions. [2021-06-12 22:28:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:28:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:28:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:03,812 INFO L225 Difference]: With dead ends: 68545 [2021-06-12 22:28:03,812 INFO L226 Difference]: Without dead ends: 68537 [2021-06-12 22:28:03,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:28:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68537 states. [2021-06-12 22:28:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68537 to 46797. [2021-06-12 22:28:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46797 states, 46796 states have (on average 3.913283186597145) internal successors, (183126), 46796 states have internal predecessors, (183126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46797 states to 46797 states and 183126 transitions. [2021-06-12 22:28:05,203 INFO L78 Accepts]: Start accepts. Automaton has 46797 states and 183126 transitions. Word has length 28 [2021-06-12 22:28:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:05,203 INFO L482 AbstractCegarLoop]: Abstraction has 46797 states and 183126 transitions. [2021-06-12 22:28:05,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:28:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 46797 states and 183126 transitions. [2021-06-12 22:28:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:05,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:05,264 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:05,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:05,464 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:05,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:05,465 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 148 times [2021-06-12 22:28:05,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:05,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107168748] [2021-06-12 22:28:05,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:05,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:05,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107168748] [2021-06-12 22:28:05,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107168748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:05,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349040260] [2021-06-12 22:28:05,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:05,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:28:05,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:05,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:05,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349040260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:05,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:05,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:28:05,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068159549] [2021-06-12 22:28:05,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:28:05,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:05,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:28:05,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:28:05,605 INFO L87 Difference]: Start difference. First operand 46797 states and 183126 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:28:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:06,637 INFO L93 Difference]: Finished difference Result 66948 states and 252499 transitions. [2021-06-12 22:28:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:28:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-12 22:28:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:06,817 INFO L225 Difference]: With dead ends: 66948 [2021-06-12 22:28:06,817 INFO L226 Difference]: Without dead ends: 66924 [2021-06-12 22:28:06,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 545.0ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:28:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66924 states. [2021-06-12 22:28:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66924 to 46693. [2021-06-12 22:28:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46693 states, 46692 states have (on average 3.9132613723978413) internal successors, (182718), 46692 states have internal predecessors, (182718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46693 states to 46693 states and 182718 transitions. [2021-06-12 22:28:08,540 INFO L78 Accepts]: Start accepts. Automaton has 46693 states and 182718 transitions. Word has length 28 [2021-06-12 22:28:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:08,540 INFO L482 AbstractCegarLoop]: Abstraction has 46693 states and 182718 transitions. [2021-06-12 22:28:08,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2021-06-12 22:28:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 46693 states and 182718 transitions. [2021-06-12 22:28:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:08,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:08,617 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:08,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:08,818 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:08,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 149 times [2021-06-12 22:28:08,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:08,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356051841] [2021-06-12 22:28:08,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:28:08,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356051841] [2021-06-12 22:28:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356051841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086198508] [2021-06-12 22:28:08,859 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:08,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:28:08,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:08,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:08,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086198508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:08,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:08,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:28:08,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707746593] [2021-06-12 22:28:08,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:28:08,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:28:08,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:28:08,981 INFO L87 Difference]: Start difference. First operand 46693 states and 182718 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:10,304 INFO L93 Difference]: Finished difference Result 68144 states and 255825 transitions. [2021-06-12 22:28:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:28:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:28:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:10,492 INFO L225 Difference]: With dead ends: 68144 [2021-06-12 22:28:10,493 INFO L226 Difference]: Without dead ends: 68144 [2021-06-12 22:28:10,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 590.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:28:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68144 states. [2021-06-12 22:28:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68144 to 46789. [2021-06-12 22:28:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46789 states, 46788 states have (on average 3.9119432333076856) internal successors, (183032), 46788 states have internal predecessors, (183032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46789 states to 46789 states and 183032 transitions. [2021-06-12 22:28:12,158 INFO L78 Accepts]: Start accepts. Automaton has 46789 states and 183032 transitions. Word has length 28 [2021-06-12 22:28:12,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:12,158 INFO L482 AbstractCegarLoop]: Abstraction has 46789 states and 183032 transitions. [2021-06-12 22:28:12,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46789 states and 183032 transitions. [2021-06-12 22:28:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:12,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:12,255 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:12,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:12,469 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 150 times [2021-06-12 22:28:12,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:12,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573545729] [2021-06-12 22:28:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:28:12,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573545729] [2021-06-12 22:28:12,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573545729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:12,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476175299] [2021-06-12 22:28:12,516 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:12,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:28:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:12,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476175299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:12,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:12,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:28:12,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559186020] [2021-06-12 22:28:12,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:28:12,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:12,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:28:12,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:28:12,634 INFO L87 Difference]: Start difference. First operand 46789 states and 183032 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:13,857 INFO L93 Difference]: Finished difference Result 67704 states and 254569 transitions. [2021-06-12 22:28:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:28:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:28:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:14,020 INFO L225 Difference]: With dead ends: 67704 [2021-06-12 22:28:14,020 INFO L226 Difference]: Without dead ends: 67696 [2021-06-12 22:28:14,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 484.2ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:28:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67696 states. [2021-06-12 22:28:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67696 to 46721. [2021-06-12 22:28:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46721 states, 46720 states have (on average 3.913099315068493) internal successors, (182820), 46720 states have internal predecessors, (182820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46721 states to 46721 states and 182820 transitions. [2021-06-12 22:28:15,422 INFO L78 Accepts]: Start accepts. Automaton has 46721 states and 182820 transitions. Word has length 28 [2021-06-12 22:28:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:15,422 INFO L482 AbstractCegarLoop]: Abstraction has 46721 states and 182820 transitions. [2021-06-12 22:28:15,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:15,422 INFO L276 IsEmpty]: Start isEmpty. Operand 46721 states and 182820 transitions. [2021-06-12 22:28:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:15,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:15,490 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:15,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:15,690 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:15,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:15,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 151 times [2021-06-12 22:28:15,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:15,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999244893] [2021-06-12 22:28:15,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:28:15,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:15,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999244893] [2021-06-12 22:28:15,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999244893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336393306] [2021-06-12 22:28:15,724 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:16,002 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 22:28:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336393306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:16,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:16,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:28:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584468126] [2021-06-12 22:28:16,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:28:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:28:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:28:16,091 INFO L87 Difference]: Start difference. First operand 46721 states and 182820 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:28:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:16,921 INFO L93 Difference]: Finished difference Result 66435 states and 251058 transitions. [2021-06-12 22:28:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:28:16,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:28:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:17,361 INFO L225 Difference]: With dead ends: 66435 [2021-06-12 22:28:17,361 INFO L226 Difference]: Without dead ends: 66411 [2021-06-12 22:28:17,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:28:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66411 states. [2021-06-12 22:28:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66411 to 46697. [2021-06-12 22:28:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46697 states, 46696 states have (on average 3.9132259722460168) internal successors, (182732), 46696 states have internal predecessors, (182732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46697 states to 46697 states and 182732 transitions. [2021-06-12 22:28:18,794 INFO L78 Accepts]: Start accepts. Automaton has 46697 states and 182732 transitions. Word has length 28 [2021-06-12 22:28:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:18,795 INFO L482 AbstractCegarLoop]: Abstraction has 46697 states and 182732 transitions. [2021-06-12 22:28:18,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:28:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 46697 states and 182732 transitions. [2021-06-12 22:28:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:18,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:18,863 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:19,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:19,064 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 152 times [2021-06-12 22:28:19,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:19,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381788418] [2021-06-12 22:28:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:19,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:19,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381788418] [2021-06-12 22:28:19,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381788418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:19,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896883749] [2021-06-12 22:28:19,102 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:19,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:28:19,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:19,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:19,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896883749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:19,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:19,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:28:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733661080] [2021-06-12 22:28:19,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:28:19,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:28:19,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:28:19,200 INFO L87 Difference]: Start difference. First operand 46697 states and 182732 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:21,103 INFO L93 Difference]: Finished difference Result 69974 states and 261149 transitions. [2021-06-12 22:28:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:28:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:28:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:21,287 INFO L225 Difference]: With dead ends: 69974 [2021-06-12 22:28:21,287 INFO L226 Difference]: Without dead ends: 69974 [2021-06-12 22:28:21,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 1057.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 22:28:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69974 states. [2021-06-12 22:28:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69974 to 51465. [2021-06-12 22:28:22,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51465 states, 51464 states have (on average 3.864293486709156) internal successors, (198872), 51464 states have internal predecessors, (198872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51465 states to 51465 states and 198872 transitions. [2021-06-12 22:28:22,840 INFO L78 Accepts]: Start accepts. Automaton has 51465 states and 198872 transitions. Word has length 28 [2021-06-12 22:28:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:22,840 INFO L482 AbstractCegarLoop]: Abstraction has 51465 states and 198872 transitions. [2021-06-12 22:28:22,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 51465 states and 198872 transitions. [2021-06-12 22:28:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:22,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:22,912 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:23,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-12 22:28:23,112 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:23,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 153 times [2021-06-12 22:28:23,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:23,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430342828] [2021-06-12 22:28:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:23,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430342828] [2021-06-12 22:28:23,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430342828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:23,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812323138] [2021-06-12 22:28:23,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:23,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:28:23,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:23,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812323138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:23,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:23,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:28:23,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63793211] [2021-06-12 22:28:23,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:28:23,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:28:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:28:23,513 INFO L87 Difference]: Start difference. First operand 51465 states and 198872 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:24,943 INFO L93 Difference]: Finished difference Result 69176 states and 258972 transitions. [2021-06-12 22:28:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:28:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:28:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:25,131 INFO L225 Difference]: With dead ends: 69176 [2021-06-12 22:28:25,131 INFO L226 Difference]: Without dead ends: 69168 [2021-06-12 22:28:25,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 883.6ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:28:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69168 states. [2021-06-12 22:28:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69168 to 50301. [2021-06-12 22:28:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50301 states, 50300 states have (on average 3.8816302186878726) internal successors, (195246), 50300 states have internal predecessors, (195246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50301 states to 50301 states and 195246 transitions. [2021-06-12 22:28:26,687 INFO L78 Accepts]: Start accepts. Automaton has 50301 states and 195246 transitions. Word has length 28 [2021-06-12 22:28:26,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:26,687 INFO L482 AbstractCegarLoop]: Abstraction has 50301 states and 195246 transitions. [2021-06-12 22:28:26,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:26,687 INFO L276 IsEmpty]: Start isEmpty. Operand 50301 states and 195246 transitions. [2021-06-12 22:28:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:26,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:26,995 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:27,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 22:28:27,209 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 154 times [2021-06-12 22:28:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:27,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087887503] [2021-06-12 22:28:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:27,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:27,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087887503] [2021-06-12 22:28:27,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087887503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:27,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237539554] [2021-06-12 22:28:27,246 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:27,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:28:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:27,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237539554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:27,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:28:27,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380150837] [2021-06-12 22:28:27,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:28:27,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:27,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:28:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:28:27,336 INFO L87 Difference]: Start difference. First operand 50301 states and 195246 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:28,671 INFO L93 Difference]: Finished difference Result 67372 states and 253976 transitions. [2021-06-12 22:28:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:28:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:28:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:28,854 INFO L225 Difference]: With dead ends: 67372 [2021-06-12 22:28:28,854 INFO L226 Difference]: Without dead ends: 67348 [2021-06-12 22:28:28,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 568.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:28:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67348 states. [2021-06-12 22:28:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67348 to 50281. [2021-06-12 22:28:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50281 states, 50280 states have (on average 3.879912490055688) internal successors, (195082), 50280 states have internal predecessors, (195082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:30,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50281 states to 50281 states and 195082 transitions. [2021-06-12 22:28:30,381 INFO L78 Accepts]: Start accepts. Automaton has 50281 states and 195082 transitions. Word has length 28 [2021-06-12 22:28:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:30,381 INFO L482 AbstractCegarLoop]: Abstraction has 50281 states and 195082 transitions. [2021-06-12 22:28:30,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 50281 states and 195082 transitions. [2021-06-12 22:28:30,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:30,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:30,737 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:30,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 22:28:30,938 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 155 times [2021-06-12 22:28:30,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:30,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322366374] [2021-06-12 22:28:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:30,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:30,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322366374] [2021-06-12 22:28:30,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322366374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:30,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467160005] [2021-06-12 22:28:30,977 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:31,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:28:31,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:31,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:31,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467160005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:31,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:31,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:28:31,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443892034] [2021-06-12 22:28:31,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:28:31,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:31,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:28:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:28:31,080 INFO L87 Difference]: Start difference. First operand 50281 states and 195082 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:32,394 INFO L93 Difference]: Finished difference Result 68744 states and 257789 transitions. [2021-06-12 22:28:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:28:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:28:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:32,588 INFO L225 Difference]: With dead ends: 68744 [2021-06-12 22:28:32,588 INFO L226 Difference]: Without dead ends: 68704 [2021-06-12 22:28:32,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:28:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68704 states. [2021-06-12 22:28:33,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68704 to 50435. [2021-06-12 22:28:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50435 states, 50434 states have (on average 3.879267954157909) internal successors, (195647), 50434 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 195647 transitions. [2021-06-12 22:28:34,143 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 195647 transitions. Word has length 28 [2021-06-12 22:28:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:34,143 INFO L482 AbstractCegarLoop]: Abstraction has 50435 states and 195647 transitions. [2021-06-12 22:28:34,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:28:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 195647 transitions. [2021-06-12 22:28:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:34,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:34,213 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:34,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:34,414 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:34,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 156 times [2021-06-12 22:28:34,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:34,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731789848] [2021-06-12 22:28:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:34,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:34,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731789848] [2021-06-12 22:28:34,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731789848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:34,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959225467] [2021-06-12 22:28:34,701 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:34,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:28:34,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:34,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959225467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:34,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:34,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:28:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129721950] [2021-06-12 22:28:34,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:28:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:28:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:28:34,866 INFO L87 Difference]: Start difference. First operand 50435 states and 195647 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:36,635 INFO L93 Difference]: Finished difference Result 67858 states and 255155 transitions. [2021-06-12 22:28:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:28:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:28:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:36,868 INFO L225 Difference]: With dead ends: 67858 [2021-06-12 22:28:36,868 INFO L226 Difference]: Without dead ends: 67858 [2021-06-12 22:28:36,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 845.2ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:28:36,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67858 states. [2021-06-12 22:28:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67858 to 51340. [2021-06-12 22:28:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51340 states, 51339 states have (on average 3.870702584779602) internal successors, (198718), 51339 states have internal predecessors, (198718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51340 states to 51340 states and 198718 transitions. [2021-06-12 22:28:38,402 INFO L78 Accepts]: Start accepts. Automaton has 51340 states and 198718 transitions. Word has length 28 [2021-06-12 22:28:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:38,402 INFO L482 AbstractCegarLoop]: Abstraction has 51340 states and 198718 transitions. [2021-06-12 22:28:38,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 51340 states and 198718 transitions. [2021-06-12 22:28:38,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:38,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:38,746 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:38,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-12 22:28:38,959 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:38,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:38,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 157 times [2021-06-12 22:28:38,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:38,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365879412] [2021-06-12 22:28:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:38,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:38,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365879412] [2021-06-12 22:28:38,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365879412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:38,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824911173] [2021-06-12 22:28:38,997 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:39,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:39,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824911173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:39,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:39,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:28:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121218712] [2021-06-12 22:28:39,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:28:39,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:39,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:28:39,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:28:39,118 INFO L87 Difference]: Start difference. First operand 51340 states and 198718 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:40,564 INFO L93 Difference]: Finished difference Result 67233 states and 253392 transitions. [2021-06-12 22:28:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:28:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:28:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:40,746 INFO L225 Difference]: With dead ends: 67233 [2021-06-12 22:28:40,746 INFO L226 Difference]: Without dead ends: 67225 [2021-06-12 22:28:40,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 667.9ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:28:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67225 states. [2021-06-12 22:28:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67225 to 51264. [2021-06-12 22:28:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51264 states, 51263 states have (on average 3.8718373875894896) internal successors, (198482), 51263 states have internal predecessors, (198482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51264 states to 51264 states and 198482 transitions. [2021-06-12 22:28:42,525 INFO L78 Accepts]: Start accepts. Automaton has 51264 states and 198482 transitions. Word has length 28 [2021-06-12 22:28:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:42,525 INFO L482 AbstractCegarLoop]: Abstraction has 51264 states and 198482 transitions. [2021-06-12 22:28:42,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 51264 states and 198482 transitions. [2021-06-12 22:28:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:42,667 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:42,667 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:42,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-12 22:28:42,868 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 158 times [2021-06-12 22:28:42,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:42,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328540316] [2021-06-12 22:28:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:42,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:42,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328540316] [2021-06-12 22:28:42,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328540316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:42,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69329580] [2021-06-12 22:28:42,912 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:42,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:28:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:43,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69329580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:43,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:43,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:28:43,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780586255] [2021-06-12 22:28:43,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:28:43,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:43,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:28:43,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:28:43,035 INFO L87 Difference]: Start difference. First operand 51264 states and 198482 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:28:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:44,321 INFO L93 Difference]: Finished difference Result 66710 states and 252146 transitions. [2021-06-12 22:28:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:28:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:28:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:44,500 INFO L225 Difference]: With dead ends: 66710 [2021-06-12 22:28:44,500 INFO L226 Difference]: Without dead ends: 66686 [2021-06-12 22:28:44,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:28:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66686 states. [2021-06-12 22:28:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66686 to 51250. [2021-06-12 22:28:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51250 states, 51249 states have (on average 3.8718218892075944) internal successors, (198427), 51249 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51250 states to 51250 states and 198427 transitions. [2021-06-12 22:28:46,030 INFO L78 Accepts]: Start accepts. Automaton has 51250 states and 198427 transitions. Word has length 28 [2021-06-12 22:28:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:46,030 INFO L482 AbstractCegarLoop]: Abstraction has 51250 states and 198427 transitions. [2021-06-12 22:28:46,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:28:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 51250 states and 198427 transitions. [2021-06-12 22:28:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:46,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:46,343 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:46,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-12 22:28:46,565 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 159 times [2021-06-12 22:28:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:46,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928552339] [2021-06-12 22:28:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:46,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:46,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928552339] [2021-06-12 22:28:46,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928552339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:46,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896860699] [2021-06-12 22:28:46,624 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:46,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:28:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:46,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:46,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:46,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896860699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:46,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:46,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:28:46,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250108889] [2021-06-12 22:28:46,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:28:46,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:46,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:28:46,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:28:46,745 INFO L87 Difference]: Start difference. First operand 51250 states and 198427 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-06-12 22:28:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:47,992 INFO L93 Difference]: Finished difference Result 66492 states and 251453 transitions. [2021-06-12 22:28:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:28:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-06-12 22:28:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:48,156 INFO L225 Difference]: With dead ends: 66492 [2021-06-12 22:28:48,156 INFO L226 Difference]: Without dead ends: 66452 [2021-06-12 22:28:48,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:28:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66452 states. [2021-06-12 22:28:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66452 to 51599. [2021-06-12 22:28:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51599 states, 51598 states have (on average 3.8733284235823096) internal successors, (199856), 51598 states have internal predecessors, (199856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51599 states to 51599 states and 199856 transitions. [2021-06-12 22:28:49,714 INFO L78 Accepts]: Start accepts. Automaton has 51599 states and 199856 transitions. Word has length 28 [2021-06-12 22:28:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:49,714 INFO L482 AbstractCegarLoop]: Abstraction has 51599 states and 199856 transitions. [2021-06-12 22:28:49,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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) [2021-06-12 22:28:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 51599 states and 199856 transitions. [2021-06-12 22:28:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:50,078 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:50,078 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:50,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:50,293 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 160 times [2021-06-12 22:28:50,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:50,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933745868] [2021-06-12 22:28:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:50,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:50,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933745868] [2021-06-12 22:28:50,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933745868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:50,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762235612] [2021-06-12 22:28:50,331 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:50,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:28:50,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:50,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:50,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:50,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762235612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:50,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:50,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:28:50,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174900614] [2021-06-12 22:28:50,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:28:50,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:28:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:28:50,449 INFO L87 Difference]: Start difference. First operand 51599 states and 199856 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:51,871 INFO L93 Difference]: Finished difference Result 80755 states and 301894 transitions. [2021-06-12 22:28:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:28:51,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:28:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:52,094 INFO L225 Difference]: With dead ends: 80755 [2021-06-12 22:28:52,094 INFO L226 Difference]: Without dead ends: 80755 [2021-06-12 22:28:52,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:28:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80755 states. [2021-06-12 22:28:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80755 to 52765. [2021-06-12 22:28:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52765 states, 52764 states have (on average 3.885433249943143) internal successors, (205011), 52764 states have internal predecessors, (205011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52765 states to 52765 states and 205011 transitions. [2021-06-12 22:28:53,980 INFO L78 Accepts]: Start accepts. Automaton has 52765 states and 205011 transitions. Word has length 28 [2021-06-12 22:28:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:53,980 INFO L482 AbstractCegarLoop]: Abstraction has 52765 states and 205011 transitions. [2021-06-12 22:28:53,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 52765 states and 205011 transitions. [2021-06-12 22:28:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:54,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:54,058 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:54,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:54,258 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:54,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 161 times [2021-06-12 22:28:54,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:54,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13510059] [2021-06-12 22:28:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:54,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:54,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13510059] [2021-06-12 22:28:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13510059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730039725] [2021-06-12 22:28:54,303 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:54,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:28:54,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:54,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730039725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:54,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:54,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:28:54,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753431232] [2021-06-12 22:28:54,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:28:54,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:54,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:28:54,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:28:54,459 INFO L87 Difference]: Start difference. First operand 52765 states and 205011 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:28:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:28:55,834 INFO L93 Difference]: Finished difference Result 73770 states and 279838 transitions. [2021-06-12 22:28:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:28:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:28:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:28:56,035 INFO L225 Difference]: With dead ends: 73770 [2021-06-12 22:28:56,035 INFO L226 Difference]: Without dead ends: 73770 [2021-06-12 22:28:56,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:28:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73770 states. [2021-06-12 22:28:57,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73770 to 52795. [2021-06-12 22:28:57,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 3.8852521119824224) internal successors, (205118), 52794 states have internal predecessors, (205118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:28:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 205118 transitions. [2021-06-12 22:28:57,861 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 205118 transitions. Word has length 28 [2021-06-12 22:28:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:28:57,861 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 205118 transitions. [2021-06-12 22:28:57,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:28:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 205118 transitions. [2021-06-12 22:28:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:28:57,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:28:57,929 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:28:58,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:58,130 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:28:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:28:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 162 times [2021-06-12 22:28:58,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:28:58,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788502938] [2021-06-12 22:28:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:28:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:28:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:58,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:28:58,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788502938] [2021-06-12 22:28:58,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788502938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:58,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319687801] [2021-06-12 22:28:58,174 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:28:58,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:28:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:28:58,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:28:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:28:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:28:58,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319687801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:28:58,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:28:58,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:28:58,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876389671] [2021-06-12 22:28:58,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:28:58,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:28:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:28:58,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:28:58,323 INFO L87 Difference]: Start difference. First operand 52795 states and 205118 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:00,348 INFO L93 Difference]: Finished difference Result 74806 states and 282789 transitions. [2021-06-12 22:29:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:29:00,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:29:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:00,558 INFO L225 Difference]: With dead ends: 74806 [2021-06-12 22:29:00,559 INFO L226 Difference]: Without dead ends: 74806 [2021-06-12 22:29:00,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1149.4ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:29:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74806 states. [2021-06-12 22:29:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74806 to 53059. [2021-06-12 22:29:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53059 states, 53058 states have (on average 3.882091296317238) internal successors, (205976), 53058 states have internal predecessors, (205976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53059 states to 53059 states and 205976 transitions. [2021-06-12 22:29:02,183 INFO L78 Accepts]: Start accepts. Automaton has 53059 states and 205976 transitions. Word has length 28 [2021-06-12 22:29:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:02,183 INFO L482 AbstractCegarLoop]: Abstraction has 53059 states and 205976 transitions. [2021-06-12 22:29:02,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 53059 states and 205976 transitions. [2021-06-12 22:29:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:02,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:02,567 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:02,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-12 22:29:02,767 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:02,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:02,767 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 163 times [2021-06-12 22:29:02,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:02,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734023423] [2021-06-12 22:29:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:02,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:02,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734023423] [2021-06-12 22:29:02,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734023423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:02,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14082298] [2021-06-12 22:29:02,804 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:02,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14082298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:02,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:02,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:29:02,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582634422] [2021-06-12 22:29:02,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:29:02,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:29:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:29:02,924 INFO L87 Difference]: Start difference. First operand 53059 states and 205976 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:04,446 INFO L93 Difference]: Finished difference Result 73815 states and 279970 transitions. [2021-06-12 22:29:04,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:29:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:29:04,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:04,647 INFO L225 Difference]: With dead ends: 73815 [2021-06-12 22:29:04,647 INFO L226 Difference]: Without dead ends: 73811 [2021-06-12 22:29:04,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 713.3ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:29:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73811 states. [2021-06-12 22:29:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73811 to 52695. [2021-06-12 22:29:06,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52695 states, 52694 states have (on average 3.8854518541010363) internal successors, (204740), 52694 states have internal predecessors, (204740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52695 states to 52695 states and 204740 transitions. [2021-06-12 22:29:06,501 INFO L78 Accepts]: Start accepts. Automaton has 52695 states and 204740 transitions. Word has length 28 [2021-06-12 22:29:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:06,501 INFO L482 AbstractCegarLoop]: Abstraction has 52695 states and 204740 transitions. [2021-06-12 22:29:06,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 52695 states and 204740 transitions. [2021-06-12 22:29:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:06,586 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:06,586 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:06,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-12 22:29:06,786 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 164 times [2021-06-12 22:29:06,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:06,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270547378] [2021-06-12 22:29:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:06,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270547378] [2021-06-12 22:29:06,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270547378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582756755] [2021-06-12 22:29:06,825 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:06,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:29:06,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:06,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582756755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:06,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:06,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:29:06,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808952832] [2021-06-12 22:29:06,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:29:06,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:06,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:29:06,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:29:06,943 INFO L87 Difference]: Start difference. First operand 52695 states and 204740 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:29:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:08,098 INFO L93 Difference]: Finished difference Result 67805 states and 258963 transitions. [2021-06-12 22:29:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:29:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:29:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:08,294 INFO L225 Difference]: With dead ends: 67805 [2021-06-12 22:29:08,295 INFO L226 Difference]: Without dead ends: 67805 [2021-06-12 22:29:08,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:29:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67805 states. [2021-06-12 22:29:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67805 to 52711. [2021-06-12 22:29:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52711 states, 52710 states have (on average 3.887080250426864) internal successors, (204888), 52710 states have internal predecessors, (204888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52711 states to 52711 states and 204888 transitions. [2021-06-12 22:29:09,945 INFO L78 Accepts]: Start accepts. Automaton has 52711 states and 204888 transitions. Word has length 28 [2021-06-12 22:29:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:09,946 INFO L482 AbstractCegarLoop]: Abstraction has 52711 states and 204888 transitions. [2021-06-12 22:29:09,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:29:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 52711 states and 204888 transitions. [2021-06-12 22:29:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:10,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:10,314 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:10,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-12 22:29:10,520 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 165 times [2021-06-12 22:29:10,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:10,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095751474] [2021-06-12 22:29:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:10,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:10,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095751474] [2021-06-12 22:29:10,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095751474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:10,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799771643] [2021-06-12 22:29:10,558 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:10,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:29:10,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:10,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:10,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799771643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:10,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:10,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:29:10,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065185264] [2021-06-12 22:29:10,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:29:10,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:10,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:29:10,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:29:10,666 INFO L87 Difference]: Start difference. First operand 52711 states and 204888 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:29:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:11,743 INFO L93 Difference]: Finished difference Result 66995 states and 256734 transitions. [2021-06-12 22:29:11,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:29:11,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:29:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:11,928 INFO L225 Difference]: With dead ends: 66995 [2021-06-12 22:29:11,929 INFO L226 Difference]: Without dead ends: 66983 [2021-06-12 22:29:11,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:29:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66983 states. [2021-06-12 22:29:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66983 to 52645. [2021-06-12 22:29:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52645 states, 52644 states have (on average 3.8880974090114733) internal successors, (204685), 52644 states have internal predecessors, (204685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52645 states to 52645 states and 204685 transitions. [2021-06-12 22:29:13,449 INFO L78 Accepts]: Start accepts. Automaton has 52645 states and 204685 transitions. Word has length 28 [2021-06-12 22:29:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:13,449 INFO L482 AbstractCegarLoop]: Abstraction has 52645 states and 204685 transitions. [2021-06-12 22:29:13,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:29:13,449 INFO L276 IsEmpty]: Start isEmpty. Operand 52645 states and 204685 transitions. [2021-06-12 22:29:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:13,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:13,528 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:13,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 22:29:13,728 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 166 times [2021-06-12 22:29:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:13,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202475297] [2021-06-12 22:29:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:13,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202475297] [2021-06-12 22:29:13,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202475297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101553399] [2021-06-12 22:29:13,768 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:13,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:29:13,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:13,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:13,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101553399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:13,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:13,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:29:13,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563091608] [2021-06-12 22:29:13,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:29:13,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:13,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:29:13,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:29:13,881 INFO L87 Difference]: Start difference. First operand 52645 states and 204685 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:29:14,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:14,830 INFO L93 Difference]: Finished difference Result 57259 states and 219875 transitions. [2021-06-12 22:29:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:29:14,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-12 22:29:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:14,988 INFO L225 Difference]: With dead ends: 57259 [2021-06-12 22:29:14,989 INFO L226 Difference]: Without dead ends: 57259 [2021-06-12 22:29:14,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 546.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:29:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57259 states. [2021-06-12 22:29:16,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57259 to 52853. [2021-06-12 22:29:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52853 states, 52852 states have (on average 3.8858888972981154) internal successors, (205377), 52852 states have internal predecessors, (205377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52853 states to 52853 states and 205377 transitions. [2021-06-12 22:29:16,952 INFO L78 Accepts]: Start accepts. Automaton has 52853 states and 205377 transitions. Word has length 28 [2021-06-12 22:29:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:16,952 INFO L482 AbstractCegarLoop]: Abstraction has 52853 states and 205377 transitions. [2021-06-12 22:29:16,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-06-12 22:29:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 52853 states and 205377 transitions. [2021-06-12 22:29:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:17,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:17,071 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:17,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-12 22:29:17,272 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:17,272 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 167 times [2021-06-12 22:29:17,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:17,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539375388] [2021-06-12 22:29:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:17,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:17,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539375388] [2021-06-12 22:29:17,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539375388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:17,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468317765] [2021-06-12 22:29:17,308 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:17,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:29:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:17,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:17,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468317765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:17,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:17,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:29:17,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360087099] [2021-06-12 22:29:17,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:29:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:29:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:29:17,418 INFO L87 Difference]: Start difference. First operand 52853 states and 205377 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:18,266 INFO L93 Difference]: Finished difference Result 57070 states and 219367 transitions. [2021-06-12 22:29:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:29:18,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:29:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:18,438 INFO L225 Difference]: With dead ends: 57070 [2021-06-12 22:29:18,438 INFO L226 Difference]: Without dead ends: 57066 [2021-06-12 22:29:18,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:29:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57066 states. [2021-06-12 22:29:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57066 to 52793. [2021-06-12 22:29:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52793 states, 52792 states have (on average 3.886668434611305) internal successors, (205185), 52792 states have internal predecessors, (205185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52793 states to 52793 states and 205185 transitions. [2021-06-12 22:29:19,904 INFO L78 Accepts]: Start accepts. Automaton has 52793 states and 205185 transitions. Word has length 28 [2021-06-12 22:29:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:19,904 INFO L482 AbstractCegarLoop]: Abstraction has 52793 states and 205185 transitions. [2021-06-12 22:29:19,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 52793 states and 205185 transitions. [2021-06-12 22:29:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:19,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:19,978 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:20,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:20,179 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 87 times [2021-06-12 22:29:20,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:20,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779390525] [2021-06-12 22:29:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:20,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:20,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779390525] [2021-06-12 22:29:20,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779390525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:20,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748498456] [2021-06-12 22:29:20,220 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:20,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:29:20,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:20,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748498456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:20,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:20,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 22:29:20,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35965441] [2021-06-12 22:29:20,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:29:20,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:29:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:29:20,300 INFO L87 Difference]: Start difference. First operand 52793 states and 205185 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-12 22:29:21,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:21,134 INFO L93 Difference]: Finished difference Result 57147 states and 219589 transitions. [2021-06-12 22:29:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:29:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-12 22:29:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:21,312 INFO L225 Difference]: With dead ends: 57147 [2021-06-12 22:29:21,312 INFO L226 Difference]: Without dead ends: 57147 [2021-06-12 22:29:21,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:29:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57147 states. [2021-06-12 22:29:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57147 to 52913. [2021-06-12 22:29:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52913 states, 52912 states have (on average 3.8848087390384034) internal successors, (205553), 52912 states have internal predecessors, (205553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52913 states to 52913 states and 205553 transitions. [2021-06-12 22:29:22,692 INFO L78 Accepts]: Start accepts. Automaton has 52913 states and 205553 transitions. Word has length 28 [2021-06-12 22:29:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:22,693 INFO L482 AbstractCegarLoop]: Abstraction has 52913 states and 205553 transitions. [2021-06-12 22:29:22,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-12 22:29:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 52913 states and 205553 transitions. [2021-06-12 22:29:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:22,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:22,773 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:22,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-12 22:29:22,976 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 88 times [2021-06-12 22:29:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:22,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669491664] [2021-06-12 22:29:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:29:23,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669491664] [2021-06-12 22:29:23,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669491664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152174714] [2021-06-12 22:29:23,010 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:23,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:29:23,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:29:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152174714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:23,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:23,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 22:29:23,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482217022] [2021-06-12 22:29:23,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:29:23,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:23,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:29:23,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:29:23,084 INFO L87 Difference]: Start difference. First operand 52913 states and 205553 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-06-12 22:29:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:23,819 INFO L93 Difference]: Finished difference Result 57331 states and 220238 transitions. [2021-06-12 22:29:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:29:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-06-12 22:29:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:23,969 INFO L225 Difference]: With dead ends: 57331 [2021-06-12 22:29:23,970 INFO L226 Difference]: Without dead ends: 57319 [2021-06-12 22:29:23,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:29:24,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57319 states. [2021-06-12 22:29:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57319 to 53047. [2021-06-12 22:29:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883195716924933) internal successors, (205988), 53046 states have internal predecessors, (205988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205988 transitions. [2021-06-12 22:29:25,461 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205988 transitions. Word has length 28 [2021-06-12 22:29:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:25,461 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205988 transitions. [2021-06-12 22:29:25,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-06-12 22:29:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205988 transitions. [2021-06-12 22:29:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:25,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:25,786 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:26,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:26,001 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 89 times [2021-06-12 22:29:26,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:26,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848811201] [2021-06-12 22:29:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:26,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:26,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848811201] [2021-06-12 22:29:26,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848811201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:26,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622768259] [2021-06-12 22:29:26,039 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:26,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:29:26,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:26,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:29:26,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:26,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622768259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:26,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:26,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 22:29:26,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839016471] [2021-06-12 22:29:26,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:29:26,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:29:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:29:26,133 INFO L87 Difference]: Start difference. First operand 53047 states and 205988 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-12 22:29:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:26,655 INFO L93 Difference]: Finished difference Result 57295 states and 220154 transitions. [2021-06-12 22:29:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:29:26,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-12 22:29:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:26,803 INFO L225 Difference]: With dead ends: 57295 [2021-06-12 22:29:26,803 INFO L226 Difference]: Without dead ends: 57275 [2021-06-12 22:29:26,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:29:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57275 states. [2021-06-12 22:29:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57275 to 53047. [2021-06-12 22:29:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53047 states, 53046 states have (on average 3.883120310673755) internal successors, (205984), 53046 states have internal predecessors, (205984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53047 states to 53047 states and 205984 transitions. [2021-06-12 22:29:28,533 INFO L78 Accepts]: Start accepts. Automaton has 53047 states and 205984 transitions. Word has length 28 [2021-06-12 22:29:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:28,533 INFO L482 AbstractCegarLoop]: Abstraction has 53047 states and 205984 transitions. [2021-06-12 22:29:28,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-06-12 22:29:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 53047 states and 205984 transitions. [2021-06-12 22:29:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:28,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:28,625 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:28,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-12 22:29:28,827 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:28,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 168 times [2021-06-12 22:29:28,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:28,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118704422] [2021-06-12 22:29:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:28,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:28,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118704422] [2021-06-12 22:29:28,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118704422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:28,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558971483] [2021-06-12 22:29:28,863 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:28,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:29:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:29:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:28,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558971483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:28,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:28,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:29:28,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100280645] [2021-06-12 22:29:28,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:29:28,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:28,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:29:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:29:28,955 INFO L87 Difference]: Start difference. First operand 53047 states and 205984 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:29,466 INFO L93 Difference]: Finished difference Result 58008 states and 223549 transitions. [2021-06-12 22:29:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:29:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:29:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:29,904 INFO L225 Difference]: With dead ends: 58008 [2021-06-12 22:29:29,904 INFO L226 Difference]: Without dead ends: 57995 [2021-06-12 22:29:29,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:29:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57995 states. [2021-06-12 22:29:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57995 to 55780. [2021-06-12 22:29:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55780 states, 55779 states have (on average 3.8898510192007745) internal successors, (216972), 55779 states have internal predecessors, (216972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55780 states to 55780 states and 216972 transitions. [2021-06-12 22:29:31,316 INFO L78 Accepts]: Start accepts. Automaton has 55780 states and 216972 transitions. Word has length 28 [2021-06-12 22:29:31,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:31,316 INFO L482 AbstractCegarLoop]: Abstraction has 55780 states and 216972 transitions. [2021-06-12 22:29:31,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 55780 states and 216972 transitions. [2021-06-12 22:29:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:31,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:31,403 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:31,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:31,603 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:31,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:31,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 169 times [2021-06-12 22:29:31,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:31,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388065627] [2021-06-12 22:29:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:31,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:31,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388065627] [2021-06-12 22:29:31,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388065627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:31,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416493528] [2021-06-12 22:29:31,638 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:31,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:29:31,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:31,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416493528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:31,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:31,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:29:31,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783236700] [2021-06-12 22:29:31,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:29:31,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:29:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:29:31,728 INFO L87 Difference]: Start difference. First operand 55780 states and 216972 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:32,525 INFO L93 Difference]: Finished difference Result 61738 states and 236391 transitions. [2021-06-12 22:29:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:29:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:29:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:32,697 INFO L225 Difference]: With dead ends: 61738 [2021-06-12 22:29:32,697 INFO L226 Difference]: Without dead ends: 61738 [2021-06-12 22:29:32,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:29:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61738 states. [2021-06-12 22:29:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61738 to 49367. [2021-06-12 22:29:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49367 states, 49366 states have (on average 3.878924766033302) internal successors, (191487), 49366 states have internal predecessors, (191487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49367 states to 49367 states and 191487 transitions. [2021-06-12 22:29:34,036 INFO L78 Accepts]: Start accepts. Automaton has 49367 states and 191487 transitions. Word has length 28 [2021-06-12 22:29:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:34,036 INFO L482 AbstractCegarLoop]: Abstraction has 49367 states and 191487 transitions. [2021-06-12 22:29:34,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:34,037 INFO L276 IsEmpty]: Start isEmpty. Operand 49367 states and 191487 transitions. [2021-06-12 22:29:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:34,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:34,113 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:34,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:34,313 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 170 times [2021-06-12 22:29:34,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:34,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172390483] [2021-06-12 22:29:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:34,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:34,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172390483] [2021-06-12 22:29:34,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172390483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:34,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646146069] [2021-06-12 22:29:34,348 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:34,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:29:34,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:34,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:29:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:34,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646146069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:34,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:34,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:29:34,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808532429] [2021-06-12 22:29:34,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:29:34,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:29:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:29:34,441 INFO L87 Difference]: Start difference. First operand 49367 states and 191487 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:35,229 INFO L93 Difference]: Finished difference Result 54325 states and 208211 transitions. [2021-06-12 22:29:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:29:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:29:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:35,374 INFO L225 Difference]: With dead ends: 54325 [2021-06-12 22:29:35,375 INFO L226 Difference]: Without dead ends: 54325 [2021-06-12 22:29:35,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:29:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54325 states. [2021-06-12 22:29:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54325 to 50200. [2021-06-12 22:29:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50200 states, 50199 states have (on average 3.8774676786390168) internal successors, (194645), 50199 states have internal predecessors, (194645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50200 states to 50200 states and 194645 transitions. [2021-06-12 22:29:36,687 INFO L78 Accepts]: Start accepts. Automaton has 50200 states and 194645 transitions. Word has length 28 [2021-06-12 22:29:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:36,687 INFO L482 AbstractCegarLoop]: Abstraction has 50200 states and 194645 transitions. [2021-06-12 22:29:36,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 50200 states and 194645 transitions. [2021-06-12 22:29:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:36,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:36,762 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:36,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:36,962 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 171 times [2021-06-12 22:29:36,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:36,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172260016] [2021-06-12 22:29:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:37,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172260016] [2021-06-12 22:29:37,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172260016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:37,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696561052] [2021-06-12 22:29:37,003 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:37,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:29:37,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:29:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:37,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696561052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:37,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:37,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:29:37,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49211393] [2021-06-12 22:29:37,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:29:37,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:37,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:29:37,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:29:37,090 INFO L87 Difference]: Start difference. First operand 50200 states and 194645 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:37,805 INFO L93 Difference]: Finished difference Result 52033 states and 200786 transitions. [2021-06-12 22:29:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:29:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:29:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:37,948 INFO L225 Difference]: With dead ends: 52033 [2021-06-12 22:29:37,948 INFO L226 Difference]: Without dead ends: 52033 [2021-06-12 22:29:37,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:29:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52033 states. [2021-06-12 22:29:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52033 to 50208. [2021-06-12 22:29:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50208 states, 50207 states have (on average 3.8773278626486345) internal successors, (194669), 50207 states have internal predecessors, (194669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50208 states to 50208 states and 194669 transitions. [2021-06-12 22:29:39,285 INFO L78 Accepts]: Start accepts. Automaton has 50208 states and 194669 transitions. Word has length 28 [2021-06-12 22:29:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:39,285 INFO L482 AbstractCegarLoop]: Abstraction has 50208 states and 194669 transitions. [2021-06-12 22:29:39,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:29:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 50208 states and 194669 transitions. [2021-06-12 22:29:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:29:39,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:39,364 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:39,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-12 22:29:39,565 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 172 times [2021-06-12 22:29:39,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:39,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852284083] [2021-06-12 22:29:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:39,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:39,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852284083] [2021-06-12 22:29:39,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852284083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:39,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67056929] [2021-06-12 22:29:39,603 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:39,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:29:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:39,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:29:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:39,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67056929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:39,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:39,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:29:39,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250376663] [2021-06-12 22:29:39,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:29:39,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:29:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:29:39,699 INFO L87 Difference]: Start difference. First operand 50208 states and 194669 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:29:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:40,393 INFO L93 Difference]: Finished difference Result 51753 states and 199864 transitions. [2021-06-12 22:29:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:29:40,394 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-12 22:29:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:40,542 INFO L225 Difference]: With dead ends: 51753 [2021-06-12 22:29:40,542 INFO L226 Difference]: Without dead ends: 51753 [2021-06-12 22:29:40,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:29:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51753 states. [2021-06-12 22:29:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51753 to 50102. [2021-06-12 22:29:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50102 states, 50101 states have (on average 3.877068321989581) internal successors, (194245), 50101 states have internal predecessors, (194245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50102 states to 50102 states and 194245 transitions. [2021-06-12 22:29:41,838 INFO L78 Accepts]: Start accepts. Automaton has 50102 states and 194245 transitions. Word has length 28 [2021-06-12 22:29:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:41,838 INFO L482 AbstractCegarLoop]: Abstraction has 50102 states and 194245 transitions. [2021-06-12 22:29:41,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-06-12 22:29:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50102 states and 194245 transitions. [2021-06-12 22:29:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:29:41,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:41,915 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:42,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:42,115 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:42,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:42,115 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 173 times [2021-06-12 22:29:42,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:42,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37354839] [2021-06-12 22:29:42,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:42,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:42,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37354839] [2021-06-12 22:29:42,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37354839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:42,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403196792] [2021-06-12 22:29:42,328 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:42,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:29:42,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:29:42,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:42,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:29:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:29:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:29:42,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:29:42,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:42,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:42,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:42,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:5 [2021-06-12 22:29:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:42,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403196792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:42,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:42,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:29:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919156211] [2021-06-12 22:29:42,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:29:42,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:29:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:29:42,975 INFO L87 Difference]: Start difference. First operand 50102 states and 194245 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) [2021-06-12 22:29:44,511 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 22:29:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:46,223 INFO L93 Difference]: Finished difference Result 58226 states and 218118 transitions. [2021-06-12 22:29:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:29:46,224 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 [2021-06-12 22:29:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:46,362 INFO L225 Difference]: With dead ends: 58226 [2021-06-12 22:29:46,362 INFO L226 Difference]: Without dead ends: 58196 [2021-06-12 22:29:46,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2705.4ms TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:29:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58196 states. [2021-06-12 22:29:47,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58196 to 50237. [2021-06-12 22:29:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50237 states, 50236 states have (on average 3.876303845847599) internal successors, (194730), 50236 states have internal predecessors, (194730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50237 states to 50237 states and 194730 transitions. [2021-06-12 22:29:47,735 INFO L78 Accepts]: Start accepts. Automaton has 50237 states and 194730 transitions. Word has length 30 [2021-06-12 22:29:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:47,735 INFO L482 AbstractCegarLoop]: Abstraction has 50237 states and 194730 transitions. [2021-06-12 22:29:47,735 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) [2021-06-12 22:29:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 50237 states and 194730 transitions. [2021-06-12 22:29:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:29:47,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:47,811 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:48,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-12 22:29:48,011 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 174 times [2021-06-12 22:29:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:48,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428753299] [2021-06-12 22:29:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:48,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:48,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428753299] [2021-06-12 22:29:48,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428753299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:48,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16470460] [2021-06-12 22:29:48,236 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:48,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:29:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:29:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:48,554 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-12 22:29:48,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-12 22:29:48,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:48,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:48,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:48,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-12 22:29:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16470460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:48,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:48,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:29:48,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820376199] [2021-06-12 22:29:48,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:29:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:29:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:29:48,581 INFO L87 Difference]: Start difference. First operand 50237 states and 194730 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) [2021-06-12 22:29:49,079 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-12 22:29:50,774 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-12 22:29:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:51,226 INFO L93 Difference]: Finished difference Result 58234 states and 218176 transitions. [2021-06-12 22:29:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:29:51,226 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 [2021-06-12 22:29:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:51,435 INFO L225 Difference]: With dead ends: 58234 [2021-06-12 22:29:51,435 INFO L226 Difference]: Without dead ends: 58204 [2021-06-12 22:29:51,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2100.7ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:29:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58204 states. [2021-06-12 22:29:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58204 to 50243. [2021-06-12 22:29:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50243 states, 50242 states have (on average 3.8763385215556707) internal successors, (194755), 50242 states have internal predecessors, (194755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50243 states to 50243 states and 194755 transitions. [2021-06-12 22:29:52,930 INFO L78 Accepts]: Start accepts. Automaton has 50243 states and 194755 transitions. Word has length 30 [2021-06-12 22:29:52,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:52,930 INFO L482 AbstractCegarLoop]: Abstraction has 50243 states and 194755 transitions. [2021-06-12 22:29:52,930 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) [2021-06-12 22:29:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 50243 states and 194755 transitions. [2021-06-12 22:29:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:29:53,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:53,001 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:53,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-12 22:29:53,201 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1352714698, now seen corresponding path program 175 times [2021-06-12 22:29:53,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:53,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667590230] [2021-06-12 22:29:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:53,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:53,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667590230] [2021-06-12 22:29:53,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667590230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:53,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871356215] [2021-06-12 22:29:53,521 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:53,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:29:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:29:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:29:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:29:53,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:29:53,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:29:53,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:29:53,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:29:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 22:29:53,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:29:53,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:29:53,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:29:53,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-12 22:29:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:53,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871356215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:53,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:29:53,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 22:29:53,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433358133] [2021-06-12 22:29:53,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:29:53,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:29:53,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:29:53,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:29:53,782 INFO L87 Difference]: Start difference. First operand 50243 states and 194755 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) 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) [2021-06-12 22:29:55,279 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 22:29:55,983 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-12 22:29:56,441 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-12 22:29:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:29:57,627 INFO L93 Difference]: Finished difference Result 71226 states and 266663 transitions. [2021-06-12 22:29:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:29:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) 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 [2021-06-12 22:29:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:29:57,804 INFO L225 Difference]: With dead ends: 71226 [2021-06-12 22:29:57,804 INFO L226 Difference]: Without dead ends: 71211 [2021-06-12 22:29:57,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 3017.9ms TimeCoverageRelationStatistics Valid=489, Invalid=3171, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:29:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71211 states. [2021-06-12 22:29:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71211 to 50282. [2021-06-12 22:29:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8760764503490384) internal successors, (194893), 50281 states have internal predecessors, (194893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:29:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194893 transitions. [2021-06-12 22:29:59,232 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194893 transitions. Word has length 30 [2021-06-12 22:29:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:29:59,232 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194893 transitions. [2021-06-12 22:29:59,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) 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) [2021-06-12 22:29:59,232 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194893 transitions. [2021-06-12 22:29:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:29:59,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:29:59,315 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:29:59,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:59,515 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:29:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:29:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash -547667522, now seen corresponding path program 176 times [2021-06-12 22:29:59,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:29:59,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690616904] [2021-06-12 22:29:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:29:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:29:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:29:59,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:29:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690616904] [2021-06-12 22:29:59,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690616904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:29:59,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818009450] [2021-06-12 22:29:59,715 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:29:59,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:29:59,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:29:59,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:29:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:00,242 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-12 22:30:00,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:00,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 22:30:00,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:00,355 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-12 22:30:00,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:30:00,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:108 [2021-06-12 22:30:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:00,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818009450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:00,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:00,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 22:30:00,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532291990] [2021-06-12 22:30:00,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:30:00,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:00,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:30:00,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:30:00,450 INFO L87 Difference]: Start difference. First operand 50282 states and 194893 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) [2021-06-12 22:30:01,558 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-12 22:30:01,929 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-12 22:30:02,375 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-12 22:30:02,782 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-12 22:30:03,175 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-12 22:30:03,367 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 22:30:03,513 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-12 22:30:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:04,614 INFO L93 Difference]: Finished difference Result 60601 states and 225495 transitions. [2021-06-12 22:30:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:30:04,615 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 [2021-06-12 22:30:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:04,775 INFO L225 Difference]: With dead ends: 60601 [2021-06-12 22:30:04,775 INFO L226 Difference]: Without dead ends: 60571 [2021-06-12 22:30:04,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3798.9ms TimeCoverageRelationStatistics Valid=665, Invalid=3757, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:30:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60571 states. [2021-06-12 22:30:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60571 to 50303. [2021-06-12 22:30:05,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50303 states, 50302 states have (on average 3.8758697467297525) internal successors, (194964), 50302 states have internal predecessors, (194964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50303 states to 50303 states and 194964 transitions. [2021-06-12 22:30:06,149 INFO L78 Accepts]: Start accepts. Automaton has 50303 states and 194964 transitions. Word has length 30 [2021-06-12 22:30:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:06,149 INFO L482 AbstractCegarLoop]: Abstraction has 50303 states and 194964 transitions. [2021-06-12 22:30:06,149 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) [2021-06-12 22:30:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 50303 states and 194964 transitions. [2021-06-12 22:30:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:06,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:06,231 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:06,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-12 22:30:06,432 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1002714042, now seen corresponding path program 177 times [2021-06-12 22:30:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:06,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569519306] [2021-06-12 22:30:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:06,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569519306] [2021-06-12 22:30:06,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569519306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:06,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037086905] [2021-06-12 22:30:06,706 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:06,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:30:06,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 22:30:06,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:06,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:06,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:06,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-06-12 22:30:07,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:30:07,040 INFO L628 ElimStorePlain]: treesize reduction 73, result has 25.5 percent of original size [2021-06-12 22:30:07,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:07,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-06-12 22:30:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:07,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037086905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:07,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:07,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:30:07,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221164141] [2021-06-12 22:30:07,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:30:07,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:07,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:30:07,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:30:07,326 INFO L87 Difference]: Start difference. First operand 50303 states and 194964 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:08,755 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-12 22:30:08,972 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-06-12 22:30:09,100 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-12 22:30:09,780 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-12 22:30:10,101 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-12 22:30:10,303 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-12 22:30:10,537 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 22:30:10,889 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-12 22:30:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:12,307 INFO L93 Difference]: Finished difference Result 79320 states and 295712 transitions. [2021-06-12 22:30:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:30:12,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:30:12,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:12,526 INFO L225 Difference]: With dead ends: 79320 [2021-06-12 22:30:12,526 INFO L226 Difference]: Without dead ends: 79290 [2021-06-12 22:30:12,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 4170.0ms TimeCoverageRelationStatistics Valid=667, Invalid=5033, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:30:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79290 states. [2021-06-12 22:30:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79290 to 50315. [2021-06-12 22:30:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50315 states, 50314 states have (on average 3.8759391024366976) internal successors, (195014), 50314 states have internal predecessors, (195014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50315 states to 50315 states and 195014 transitions. [2021-06-12 22:30:14,329 INFO L78 Accepts]: Start accepts. Automaton has 50315 states and 195014 transitions. Word has length 30 [2021-06-12 22:30:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:14,329 INFO L482 AbstractCegarLoop]: Abstraction has 50315 states and 195014 transitions. [2021-06-12 22:30:14,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 50315 states and 195014 transitions. [2021-06-12 22:30:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:14,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:14,428 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:14,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:14,645 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2016530042, now seen corresponding path program 178 times [2021-06-12 22:30:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:14,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747043158] [2021-06-12 22:30:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:14,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747043158] [2021-06-12 22:30:14,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747043158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675927503] [2021-06-12 22:30:14,849 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:14,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:30:14,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:30:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:15,153 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-12 22:30:15,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-12 22:30:15,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:15,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:15,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:15,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-12 22:30:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:15,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675927503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:15,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:15,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:30:15,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24668221] [2021-06-12 22:30:15,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:30:15,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:15,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:30:15,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:30:15,180 INFO L87 Difference]: Start difference. First operand 50315 states and 195014 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) [2021-06-12 22:30:16,015 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-12 22:30:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:18,129 INFO L93 Difference]: Finished difference Result 61699 states and 228811 transitions. [2021-06-12 22:30:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:30:18,130 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 [2021-06-12 22:30:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:18,284 INFO L225 Difference]: With dead ends: 61699 [2021-06-12 22:30:18,284 INFO L226 Difference]: Without dead ends: 61624 [2021-06-12 22:30:18,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2403.6ms TimeCoverageRelationStatistics Valid=551, Invalid=2419, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:30:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61624 states. [2021-06-12 22:30:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61624 to 50371. [2021-06-12 22:30:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50371 states, 50370 states have (on average 3.8753027595791147) internal successors, (195199), 50370 states have internal predecessors, (195199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50371 states to 50371 states and 195199 transitions. [2021-06-12 22:30:19,705 INFO L78 Accepts]: Start accepts. Automaton has 50371 states and 195199 transitions. Word has length 30 [2021-06-12 22:30:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:19,705 INFO L482 AbstractCegarLoop]: Abstraction has 50371 states and 195199 transitions. [2021-06-12 22:30:19,706 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) [2021-06-12 22:30:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 50371 states and 195199 transitions. [2021-06-12 22:30:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:19,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:19,788 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:19,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-12 22:30:19,989 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash -728055690, now seen corresponding path program 179 times [2021-06-12 22:30:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:19,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891554900] [2021-06-12 22:30:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:20,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:20,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891554900] [2021-06-12 22:30:20,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891554900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:20,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896391774] [2021-06-12 22:30:20,245 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:20,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:30:20,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:30:20,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:20,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:20,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:20,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:20,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:20,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:20,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:20,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:30:20,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:20,875 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.9 percent of original size [2021-06-12 22:30:20,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:20,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:5 [2021-06-12 22:30:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:20,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896391774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:20,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:20,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 22:30:20,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657581195] [2021-06-12 22:30:20,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:30:20,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:20,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:30:20,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:30:20,894 INFO L87 Difference]: Start difference. First operand 50371 states and 195199 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) [2021-06-12 22:30:22,056 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-12 22:30:22,301 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-12 22:30:22,434 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-12 22:30:23,099 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-12 22:30:23,462 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-12 22:30:23,801 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-12 22:30:24,055 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-12 22:30:24,462 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-12 22:30:25,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:25,703 INFO L93 Difference]: Finished difference Result 71419 states and 267281 transitions. [2021-06-12 22:30:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:30:25,704 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 [2021-06-12 22:30:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:25,896 INFO L225 Difference]: With dead ends: 71419 [2021-06-12 22:30:25,896 INFO L226 Difference]: Without dead ends: 71404 [2021-06-12 22:30:25,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 4138.8ms TimeCoverageRelationStatistics Valid=568, Invalid=3854, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:30:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71404 states. [2021-06-12 22:30:27,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71404 to 50405. [2021-06-12 22:30:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50405 states, 50404 states have (on average 3.8749702404571065) internal successors, (195314), 50404 states have internal predecessors, (195314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50405 states to 50405 states and 195314 transitions. [2021-06-12 22:30:27,519 INFO L78 Accepts]: Start accepts. Automaton has 50405 states and 195314 transitions. Word has length 30 [2021-06-12 22:30:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:27,519 INFO L482 AbstractCegarLoop]: Abstraction has 50405 states and 195314 transitions. [2021-06-12 22:30:27,519 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) [2021-06-12 22:30:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 50405 states and 195314 transitions. [2021-06-12 22:30:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:27,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:27,618 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:27,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 22:30:27,832 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash -610282946, now seen corresponding path program 180 times [2021-06-12 22:30:27,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:27,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100092763] [2021-06-12 22:30:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:28,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:28,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100092763] [2021-06-12 22:30:28,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100092763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:28,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303859] [2021-06-12 22:30:28,024 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:28,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:30:28,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:28,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:30:28,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:28,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:28,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:28,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:28,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 22:30:28,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:28,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:28,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:28,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-12 22:30:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:28,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:28,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:28,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:30:28,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482022621] [2021-06-12 22:30:28,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:30:28,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:28,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:30:28,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:30:28,341 INFO L87 Difference]: Start difference. First operand 50405 states and 195314 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) [2021-06-12 22:30:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:31,750 INFO L93 Difference]: Finished difference Result 83242 states and 309514 transitions. [2021-06-12 22:30:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:30:31,751 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 [2021-06-12 22:30:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:31,966 INFO L225 Difference]: With dead ends: 83242 [2021-06-12 22:30:31,966 INFO L226 Difference]: Without dead ends: 83227 [2021-06-12 22:30:31,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 2362.0ms TimeCoverageRelationStatistics Valid=401, Invalid=3259, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:30:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83227 states. [2021-06-12 22:30:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83227 to 50447. [2021-06-12 22:30:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50447 states, 50446 states have (on average 3.874499464774214) internal successors, (195453), 50446 states have internal predecessors, (195453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50447 states to 50447 states and 195453 transitions. [2021-06-12 22:30:33,805 INFO L78 Accepts]: Start accepts. Automaton has 50447 states and 195453 transitions. Word has length 30 [2021-06-12 22:30:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:33,805 INFO L482 AbstractCegarLoop]: Abstraction has 50447 states and 195453 transitions. [2021-06-12 22:30:33,805 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) [2021-06-12 22:30:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 50447 states and 195453 transitions. [2021-06-12 22:30:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:33,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:33,887 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:34,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:34,088 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:34,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1538513590, now seen corresponding path program 181 times [2021-06-12 22:30:34,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:34,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540768835] [2021-06-12 22:30:34,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:34,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:34,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540768835] [2021-06-12 22:30:34,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540768835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:34,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236894016] [2021-06-12 22:30:34,265 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:30:34,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:34,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:34,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:34,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 22:30:34,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:34,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:34,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:34,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-12 22:30:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236894016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:34,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:34,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:30:34,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4640167] [2021-06-12 22:30:34,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:30:34,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:30:34,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:30:34,605 INFO L87 Difference]: Start difference. First operand 50447 states and 195453 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) [2021-06-12 22:30:35,251 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 22:30:37,949 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 22:30:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:38,577 INFO L93 Difference]: Finished difference Result 94065 states and 345973 transitions. [2021-06-12 22:30:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:30:38,577 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 [2021-06-12 22:30:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:38,826 INFO L225 Difference]: With dead ends: 94065 [2021-06-12 22:30:38,826 INFO L226 Difference]: Without dead ends: 94014 [2021-06-12 22:30:38,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2902.5ms TimeCoverageRelationStatistics Valid=507, Invalid=3653, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:30:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94014 states. [2021-06-12 22:30:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94014 to 50456. [2021-06-12 22:30:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.8745813100782875) internal successors, (195492), 50455 states have internal predecessors, (195492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195492 transitions. [2021-06-12 22:30:40,518 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195492 transitions. Word has length 30 [2021-06-12 22:30:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:40,518 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195492 transitions. [2021-06-12 22:30:40,518 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) [2021-06-12 22:30:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195492 transitions. [2021-06-12 22:30:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:40,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:40,841 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:41,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:41,057 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash -372848078, now seen corresponding path program 90 times [2021-06-12 22:30:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:41,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466878054] [2021-06-12 22:30:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:41,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:41,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466878054] [2021-06-12 22:30:41,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466878054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:41,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696282585] [2021-06-12 22:30:41,467 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:41,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:30:41,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:41,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:30:41,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:41,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:41,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:41,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:41,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-06-12 22:30:41,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:41,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:41,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:41,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:12 [2021-06-12 22:30:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:41,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696282585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:41,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:41,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:30:41,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889306304] [2021-06-12 22:30:41,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:30:41,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:41,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:30:41,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:30:41,848 INFO L87 Difference]: Start difference. First operand 50456 states and 195492 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-12 22:30:42,687 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-12 22:30:43,176 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-12 22:30:43,591 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-12 22:30:43,783 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-12 22:30:44,242 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 22:30:44,458 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-12 22:30:44,685 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-12 22:30:44,887 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-12 22:30:46,341 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-12 22:30:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:46,872 INFO L93 Difference]: Finished difference Result 63848 states and 240271 transitions. [2021-06-12 22:30:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:30:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 [2021-06-12 22:30:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:47,043 INFO L225 Difference]: With dead ends: 63848 [2021-06-12 22:30:47,043 INFO L226 Difference]: Without dead ends: 63833 [2021-06-12 22:30:47,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4162.9ms TimeCoverageRelationStatistics Valid=540, Invalid=3366, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:30:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63833 states. [2021-06-12 22:30:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63833 to 50491. [2021-06-12 22:30:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50491 states, 50490 states have (on average 3.873598732422262) internal successors, (195578), 50490 states have internal predecessors, (195578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50491 states to 50491 states and 195578 transitions. [2021-06-12 22:30:48,402 INFO L78 Accepts]: Start accepts. Automaton has 50491 states and 195578 transitions. Word has length 30 [2021-06-12 22:30:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:48,402 INFO L482 AbstractCegarLoop]: Abstraction has 50491 states and 195578 transitions. [2021-06-12 22:30:48,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-12 22:30:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 50491 states and 195578 transitions. [2021-06-12 22:30:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:48,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:48,484 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:48,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:48,685 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash -792944066, now seen corresponding path program 182 times [2021-06-12 22:30:48,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:48,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460780395] [2021-06-12 22:30:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:48,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:48,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460780395] [2021-06-12 22:30:48,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460780395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:48,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832226722] [2021-06-12 22:30:48,890 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:48,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:30:48,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:30:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:49,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:49,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:49,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:49,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:49,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:49,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:49,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 22:30:49,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:49,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:30:49,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:49,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-12 22:30:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:49,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832226722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:49,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:49,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:30:49,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797848540] [2021-06-12 22:30:49,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:30:49,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:49,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:30:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:30:49,531 INFO L87 Difference]: Start difference. First operand 50491 states and 195578 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) [2021-06-12 22:30:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:52,855 INFO L93 Difference]: Finished difference Result 84008 states and 311824 transitions. [2021-06-12 22:30:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:30:52,856 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 [2021-06-12 22:30:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:30:53,066 INFO L225 Difference]: With dead ends: 84008 [2021-06-12 22:30:53,066 INFO L226 Difference]: Without dead ends: 83993 [2021-06-12 22:30:53,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2491.7ms TimeCoverageRelationStatistics Valid=357, Invalid=2949, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:30:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83993 states. [2021-06-12 22:30:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83993 to 50558. [2021-06-12 22:30:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:30:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-12 22:30:54,604 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-12 22:30:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:30:54,604 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-12 22:30:54,604 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) [2021-06-12 22:30:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-12 22:30:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:30:54,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:30:54,934 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:30:55,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:55,134 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:30:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:30:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash 956036336, now seen corresponding path program 183 times [2021-06-12 22:30:55,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:30:55,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127326311] [2021-06-12 22:30:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:30:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:30:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:55,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:30:55,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127326311] [2021-06-12 22:30:55,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127326311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:55,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223566968] [2021-06-12 22:30:55,314 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:30:55,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:30:55,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:30:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:30:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:30:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:30:55,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:30:55,787 INFO L354 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2021-06-12 22:30:55,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 57 treesize of output 76 [2021-06-12 22:30:55,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:30:55,878 INFO L628 ElimStorePlain]: treesize reduction 25, result has 80.8 percent of original size [2021-06-12 22:30:55,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:30:55,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:75, output treesize:33 [2021-06-12 22:30:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:30:55,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223566968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:30:55,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:30:55,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-12 22:30:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246400572] [2021-06-12 22:30:55,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:30:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:30:55,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:30:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:30:55,953 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 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) [2021-06-12 22:30:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:30:59,800 INFO L93 Difference]: Finished difference Result 83166 states and 309365 transitions. [2021-06-12 22:30:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:30:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 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 [2021-06-12 22:30:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:00,010 INFO L225 Difference]: With dead ends: 83166 [2021-06-12 22:31:00,010 INFO L226 Difference]: Without dead ends: 83136 [2021-06-12 22:31:00,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2435.0ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83136 states. [2021-06-12 22:31:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83136 to 50558. [2021-06-12 22:31:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50558 states, 50557 states have (on average 3.873133295092668) internal successors, (195814), 50557 states have internal predecessors, (195814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50558 states to 50558 states and 195814 transitions. [2021-06-12 22:31:01,980 INFO L78 Accepts]: Start accepts. Automaton has 50558 states and 195814 transitions. Word has length 30 [2021-06-12 22:31:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:01,980 INFO L482 AbstractCegarLoop]: Abstraction has 50558 states and 195814 transitions. [2021-06-12 22:31:01,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 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) [2021-06-12 22:31:01,989 INFO L276 IsEmpty]: Start isEmpty. Operand 50558 states and 195814 transitions. [2021-06-12 22:31:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:02,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:02,108 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:02,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:02,323 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1261273866, now seen corresponding path program 184 times [2021-06-12 22:31:02,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:02,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68506118] [2021-06-12 22:31:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:02,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68506118] [2021-06-12 22:31:02,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68506118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880134771] [2021-06-12 22:31:02,615 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:31:02,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:31:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:31:02,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:03,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:31:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:03,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:03,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:31:03,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:03,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:03,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:03,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-12 22:31:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:03,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880134771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:03,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:03,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:31:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019473965] [2021-06-12 22:31:03,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:31:03,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:31:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:31:03,059 INFO L87 Difference]: Start difference. First operand 50558 states and 195814 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:03,923 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-12 22:31:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:05,777 INFO L93 Difference]: Finished difference Result 69018 states and 261530 transitions. [2021-06-12 22:31:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:31:05,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:31:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:05,969 INFO L225 Difference]: With dead ends: 69018 [2021-06-12 22:31:05,970 INFO L226 Difference]: Without dead ends: 68952 [2021-06-12 22:31:05,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 2089.9ms TimeCoverageRelationStatistics Valid=521, Invalid=2131, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:31:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68952 states. [2021-06-12 22:31:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68952 to 50665. [2021-06-12 22:31:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50665 states, 50664 states have (on average 3.873263066477183) internal successors, (196235), 50664 states have internal predecessors, (196235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50665 states to 50665 states and 196235 transitions. [2021-06-12 22:31:07,424 INFO L78 Accepts]: Start accepts. Automaton has 50665 states and 196235 transitions. Word has length 30 [2021-06-12 22:31:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:07,424 INFO L482 AbstractCegarLoop]: Abstraction has 50665 states and 196235 transitions. [2021-06-12 22:31:07,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 50665 states and 196235 transitions. [2021-06-12 22:31:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:07,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:07,502 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:07,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-12 22:31:07,702 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1005295414, now seen corresponding path program 185 times [2021-06-12 22:31:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:07,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180371895] [2021-06-12 22:31:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:07,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:07,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180371895] [2021-06-12 22:31:07,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180371895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:07,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132115628] [2021-06-12 22:31:07,900 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:07,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:31:07,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:31:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:08,218 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-12 22:31:08,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:31:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:08,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:31:08,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:08,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:08,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:08,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-12 22:31:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:08,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132115628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:08,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:08,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:31:08,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042950903] [2021-06-12 22:31:08,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:31:08,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:08,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:31:08,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:31:08,489 INFO L87 Difference]: Start difference. First operand 50665 states and 196235 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) [2021-06-12 22:31:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:10,809 INFO L93 Difference]: Finished difference Result 68874 states and 261214 transitions. [2021-06-12 22:31:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:31:10,810 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 [2021-06-12 22:31:10,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:10,989 INFO L225 Difference]: With dead ends: 68874 [2021-06-12 22:31:10,989 INFO L226 Difference]: Without dead ends: 68826 [2021-06-12 22:31:10,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1805.9ms TimeCoverageRelationStatistics Valid=498, Invalid=2052, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:31:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68826 states. [2021-06-12 22:31:12,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68826 to 50649. [2021-06-12 22:31:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50649 states, 50648 states have (on average 3.8736574000947717) internal successors, (196193), 50648 states have internal predecessors, (196193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50649 states to 50649 states and 196193 transitions. [2021-06-12 22:31:12,638 INFO L78 Accepts]: Start accepts. Automaton has 50649 states and 196193 transitions. Word has length 30 [2021-06-12 22:31:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:12,638 INFO L482 AbstractCegarLoop]: Abstraction has 50649 states and 196193 transitions. [2021-06-12 22:31:12,638 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) [2021-06-12 22:31:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 50649 states and 196193 transitions. [2021-06-12 22:31:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:12,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:12,737 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:12,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-12 22:31:12,939 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:12,939 INFO L82 PathProgramCache]: Analyzing trace with hash -893195398, now seen corresponding path program 186 times [2021-06-12 22:31:12,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:12,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6481837] [2021-06-12 22:31:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:13,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:13,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6481837] [2021-06-12 22:31:13,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6481837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:13,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900161477] [2021-06-12 22:31:13,141 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:13,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:31:13,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:13,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:31:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:13,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:13,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:13,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:31:13,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:31:13,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:13,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:13,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:13,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-06-12 22:31:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:13,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900161477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:13,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:13,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:31:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071669247] [2021-06-12 22:31:13,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:31:13,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:13,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:31:13,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:31:13,464 INFO L87 Difference]: Start difference. First operand 50649 states and 196193 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) [2021-06-12 22:31:14,276 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-12 22:31:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:16,415 INFO L93 Difference]: Finished difference Result 72235 states and 271440 transitions. [2021-06-12 22:31:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:31:16,416 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 [2021-06-12 22:31:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:16,599 INFO L225 Difference]: With dead ends: 72235 [2021-06-12 22:31:16,600 INFO L226 Difference]: Without dead ends: 72163 [2021-06-12 22:31:16,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2116.7ms TimeCoverageRelationStatistics Valid=695, Invalid=2727, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:31:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72163 states. [2021-06-12 22:31:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72163 to 50684. [2021-06-12 22:31:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50684 states, 50683 states have (on average 3.8730738117317443) internal successors, (196299), 50683 states have internal predecessors, (196299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50684 states to 50684 states and 196299 transitions. [2021-06-12 22:31:18,106 INFO L78 Accepts]: Start accepts. Automaton has 50684 states and 196299 transitions. Word has length 30 [2021-06-12 22:31:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:18,106 INFO L482 AbstractCegarLoop]: Abstraction has 50684 states and 196299 transitions. [2021-06-12 22:31:18,106 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) [2021-06-12 22:31:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 50684 states and 196299 transitions. [2021-06-12 22:31:18,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:18,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:18,454 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:18,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:18,685 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash -319132678, now seen corresponding path program 187 times [2021-06-12 22:31:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:18,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014242178] [2021-06-12 22:31:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:18,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014242178] [2021-06-12 22:31:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014242178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200327811] [2021-06-12 22:31:18,867 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:18,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:31:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:19,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:31:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:19,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:31:19,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:31:19,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:19,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:19,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:19,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:15 [2021-06-12 22:31:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:19,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200327811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:19,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:19,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 22:31:19,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507178595] [2021-06-12 22:31:19,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:31:19,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:19,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:31:19,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:31:19,268 INFO L87 Difference]: Start difference. First operand 50684 states and 196299 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:31:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:24,467 INFO L93 Difference]: Finished difference Result 91851 states and 339846 transitions. [2021-06-12 22:31:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:31:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-06-12 22:31:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:24,718 INFO L225 Difference]: With dead ends: 91851 [2021-06-12 22:31:24,718 INFO L226 Difference]: Without dead ends: 91815 [2021-06-12 22:31:24,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 3932.7ms TimeCoverageRelationStatistics Valid=631, Invalid=5221, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:31:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91815 states. [2021-06-12 22:31:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91815 to 50856. [2021-06-12 22:31:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-12 22:31:26,527 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-12 22:31:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:26,527 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-12 22:31:26,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:31:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-12 22:31:26,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:26,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:26,605 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:26,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-12 22:31:26,806 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:26,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1890767390, now seen corresponding path program 188 times [2021-06-12 22:31:26,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:26,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141747966] [2021-06-12 22:31:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:27,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:27,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141747966] [2021-06-12 22:31:27,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141747966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:27,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740818130] [2021-06-12 22:31:27,006 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:27,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:31:27,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:27,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 22:31:27,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:27,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:27,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-06-12 22:31:27,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:31:27,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:27,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:31:27,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:23 [2021-06-12 22:31:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:27,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740818130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:27,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:27,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-12 22:31:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701227667] [2021-06-12 22:31:27,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:31:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:31:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:31:27,437 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:31:27,795 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-06-12 22:31:29,645 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-12 22:31:30,878 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-12 22:31:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:32,723 INFO L93 Difference]: Finished difference Result 71154 states and 268043 transitions. [2021-06-12 22:31:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:31:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-06-12 22:31:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:32,909 INFO L225 Difference]: With dead ends: 71154 [2021-06-12 22:31:32,909 INFO L226 Difference]: Without dead ends: 71103 [2021-06-12 22:31:32,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 4122.0ms TimeCoverageRelationStatistics Valid=839, Invalid=4563, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 22:31:33,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71103 states. [2021-06-12 22:31:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71103 to 50856. [2021-06-12 22:31:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50856 states, 50855 states have (on average 3.8713007570543705) internal successors, (196875), 50855 states have internal predecessors, (196875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50856 states to 50856 states and 196875 transitions. [2021-06-12 22:31:34,533 INFO L78 Accepts]: Start accepts. Automaton has 50856 states and 196875 transitions. Word has length 30 [2021-06-12 22:31:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:34,533 INFO L482 AbstractCegarLoop]: Abstraction has 50856 states and 196875 transitions. [2021-06-12 22:31:34,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:31:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 50856 states and 196875 transitions. [2021-06-12 22:31:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:34,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:34,612 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:34,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:34,813 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash -137630626, now seen corresponding path program 189 times [2021-06-12 22:31:34,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:34,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060852218] [2021-06-12 22:31:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:35,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:35,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060852218] [2021-06-12 22:31:35,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060852218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:35,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213460195] [2021-06-12 22:31:35,012 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:35,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:31:35,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:35,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:31:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:35,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 22:31:35,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:35,363 INFO L628 ElimStorePlain]: treesize reduction 53, result has 45.9 percent of original size [2021-06-12 22:31:35,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:31:35,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:103 [2021-06-12 22:31:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:35,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213460195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:35,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:35,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 22:31:35,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311797573] [2021-06-12 22:31:35,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:31:35,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:31:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:31:35,454 INFO L87 Difference]: Start difference. First operand 50856 states and 196875 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) [2021-06-12 22:31:35,859 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-12 22:31:37,701 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-12 22:31:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:39,777 INFO L93 Difference]: Finished difference Result 71044 states and 267781 transitions. [2021-06-12 22:31:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:31:39,778 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 [2021-06-12 22:31:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:39,970 INFO L225 Difference]: With dead ends: 71044 [2021-06-12 22:31:39,970 INFO L226 Difference]: Without dead ends: 70990 [2021-06-12 22:31:39,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 3284.8ms TimeCoverageRelationStatistics Valid=670, Invalid=3886, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:31:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70990 states. [2021-06-12 22:31:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70990 to 50820. [2021-06-12 22:31:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50820 states, 50819 states have (on average 3.8718195950333536) internal successors, (196762), 50819 states have internal predecessors, (196762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50820 states to 50820 states and 196762 transitions. [2021-06-12 22:31:41,363 INFO L78 Accepts]: Start accepts. Automaton has 50820 states and 196762 transitions. Word has length 30 [2021-06-12 22:31:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:41,363 INFO L482 AbstractCegarLoop]: Abstraction has 50820 states and 196762 transitions. [2021-06-12 22:31:41,363 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) [2021-06-12 22:31:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 50820 states and 196762 transitions. [2021-06-12 22:31:41,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:41,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:41,447 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:41,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:41,648 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:41,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2075040334, now seen corresponding path program 190 times [2021-06-12 22:31:41,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:41,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203431406] [2021-06-12 22:31:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:41,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:41,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203431406] [2021-06-12 22:31:41,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203431406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:41,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607635802] [2021-06-12 22:31:41,806 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:41,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:31:41,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:31:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:42,156 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-06-12 22:31:42,410 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-12 22:31:42,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-12 22:31:42,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:42,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:42,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:42,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-12 22:31:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:42,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607635802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:42,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:42,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:31:42,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123846076] [2021-06-12 22:31:42,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:31:42,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:31:42,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:31:42,434 INFO L87 Difference]: Start difference. First operand 50820 states and 196762 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:43,871 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-12 22:31:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:45,742 INFO L93 Difference]: Finished difference Result 76562 states and 289629 transitions. [2021-06-12 22:31:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:31:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:31:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:45,946 INFO L225 Difference]: With dead ends: 76562 [2021-06-12 22:31:45,946 INFO L226 Difference]: Without dead ends: 76526 [2021-06-12 22:31:45,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2605.2ms TimeCoverageRelationStatistics Valid=647, Invalid=2893, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:31:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76526 states. [2021-06-12 22:31:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76526 to 50849. [2021-06-12 22:31:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50849 states, 50848 states have (on average 3.8721286972938955) internal successors, (196890), 50848 states have internal predecessors, (196890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50849 states to 50849 states and 196890 transitions. [2021-06-12 22:31:47,446 INFO L78 Accepts]: Start accepts. Automaton has 50849 states and 196890 transitions. Word has length 30 [2021-06-12 22:31:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:47,446 INFO L482 AbstractCegarLoop]: Abstraction has 50849 states and 196890 transitions. [2021-06-12 22:31:47,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50849 states and 196890 transitions. [2021-06-12 22:31:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:47,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:47,530 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:47,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:47,730 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:47,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2052117870, now seen corresponding path program 191 times [2021-06-12 22:31:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:47,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201908622] [2021-06-12 22:31:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:47,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:47,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201908622] [2021-06-12 22:31:47,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201908622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:47,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013766287] [2021-06-12 22:31:47,890 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:47,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:31:47,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:31:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:31:48,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:31:48,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:31:48,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:31:48,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:48,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:48,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:5 [2021-06-12 22:31:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:48,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013766287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:48,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:48,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 22:31:48,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649461327] [2021-06-12 22:31:48,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:31:48,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:48,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:31:48,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:31:48,466 INFO L87 Difference]: Start difference. First operand 50849 states and 196890 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-06-12 22:31:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:31:49,880 INFO L93 Difference]: Finished difference Result 60558 states and 229990 transitions. [2021-06-12 22:31:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:31:49,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 [2021-06-12 22:31:49,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:31:50,052 INFO L225 Difference]: With dead ends: 60558 [2021-06-12 22:31:50,052 INFO L226 Difference]: Without dead ends: 60543 [2021-06-12 22:31:50,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 916.7ms TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:31:50,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60543 states. [2021-06-12 22:31:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60543 to 50841. [2021-06-12 22:31:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50841 states, 50840 states have (on average 3.8721872541306057) internal successors, (196862), 50840 states have internal predecessors, (196862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50841 states to 50841 states and 196862 transitions. [2021-06-12 22:31:51,407 INFO L78 Accepts]: Start accepts. Automaton has 50841 states and 196862 transitions. Word has length 30 [2021-06-12 22:31:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:31:51,407 INFO L482 AbstractCegarLoop]: Abstraction has 50841 states and 196862 transitions. [2021-06-12 22:31:51,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2021-06-12 22:31:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 50841 states and 196862 transitions. [2021-06-12 22:31:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:31:51,488 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:31:51,488 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:31:51,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:51,688 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:31:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:31:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash -15398158, now seen corresponding path program 192 times [2021-06-12 22:31:51,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:31:51,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309351081] [2021-06-12 22:31:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:31:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:31:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:51,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:31:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309351081] [2021-06-12 22:31:51,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309351081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:51,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740796967] [2021-06-12 22:31:51,875 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:31:51,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:31:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:31:51,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 22:31:51,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:31:52,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:31:52,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 71 [2021-06-12 22:31:52,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:31:52,640 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2021-06-12 22:31:52,640 INFO L628 ElimStorePlain]: treesize reduction 217, result has 29.5 percent of original size [2021-06-12 22:31:52,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:31:52,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:200 [2021-06-12 22:31:52,802 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-06-12 22:31:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:31:52,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740796967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:31:52,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:31:52,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-12 22:31:52,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950286451] [2021-06-12 22:31:52,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:31:52,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:31:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:31:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:31:52,943 INFO L87 Difference]: Start difference. First operand 50841 states and 196862 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:31:55,915 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-12 22:31:56,421 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-12 22:31:59,269 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 22:31:59,608 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-12 22:31:59,743 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-12 22:31:59,941 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-12 22:32:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:00,452 INFO L93 Difference]: Finished difference Result 81005 states and 305937 transitions. [2021-06-12 22:32:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 22:32:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:32:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:00,674 INFO L225 Difference]: With dead ends: 81005 [2021-06-12 22:32:00,674 INFO L226 Difference]: Without dead ends: 80960 [2021-06-12 22:32:00,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 5979.4ms TimeCoverageRelationStatistics Valid=1313, Invalid=7807, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 22:32:00,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80960 states. [2021-06-12 22:32:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80960 to 50848. [2021-06-12 22:32:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50848 states, 50847 states have (on average 3.8721851829999805) internal successors, (196889), 50847 states have internal predecessors, (196889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50848 states to 50848 states and 196889 transitions. [2021-06-12 22:32:02,250 INFO L78 Accepts]: Start accepts. Automaton has 50848 states and 196889 transitions. Word has length 30 [2021-06-12 22:32:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:02,250 INFO L482 AbstractCegarLoop]: Abstraction has 50848 states and 196889 transitions. [2021-06-12 22:32:02,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 50848 states and 196889 transitions. [2021-06-12 22:32:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:02,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:02,331 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:02,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-12 22:32:02,531 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:02,531 INFO L82 PathProgramCache]: Analyzing trace with hash -512119518, now seen corresponding path program 193 times [2021-06-12 22:32:02,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:02,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863709025] [2021-06-12 22:32:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:02,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863709025] [2021-06-12 22:32:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863709025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321528767] [2021-06-12 22:32:02,766 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:02,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:32:02,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:03,314 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-12 22:32:03,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-12 22:32:03,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:03,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:03,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:03,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-12 22:32:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:03,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321528767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:03,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:03,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:32:03,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775883489] [2021-06-12 22:32:03,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:32:03,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:03,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:32:03,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:32:03,339 INFO L87 Difference]: Start difference. First operand 50848 states and 196889 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) [2021-06-12 22:32:04,796 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-06-12 22:32:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:06,361 INFO L93 Difference]: Finished difference Result 77700 states and 291511 transitions. [2021-06-12 22:32:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:32:06,362 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 [2021-06-12 22:32:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:06,797 INFO L225 Difference]: With dead ends: 77700 [2021-06-12 22:32:06,798 INFO L226 Difference]: Without dead ends: 77655 [2021-06-12 22:32:06,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2303.1ms TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:32:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77655 states. [2021-06-12 22:32:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77655 to 50905. [2021-06-12 22:32:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50905 states, 50904 states have (on average 3.873035517837498) internal successors, (197153), 50904 states have internal predecessors, (197153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50905 states to 50905 states and 197153 transitions. [2021-06-12 22:32:08,344 INFO L78 Accepts]: Start accepts. Automaton has 50905 states and 197153 transitions. Word has length 30 [2021-06-12 22:32:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:08,344 INFO L482 AbstractCegarLoop]: Abstraction has 50905 states and 197153 transitions. [2021-06-12 22:32:08,344 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) [2021-06-12 22:32:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50905 states and 197153 transitions. [2021-06-12 22:32:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:08,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:08,427 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:08,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:08,627 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:08,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2129652298, now seen corresponding path program 194 times [2021-06-12 22:32:08,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:08,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458938622] [2021-06-12 22:32:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:08,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458938622] [2021-06-12 22:32:08,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458938622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125777833] [2021-06-12 22:32:08,797 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:08,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:32:08,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:08,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:32:08,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:09,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:09,073 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 27 treesize of output 39 [2021-06-12 22:32:09,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:32:09,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:09,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:32:09,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-12 22:32:09,304 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-12 22:32:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:09,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125777833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:09,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:09,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:32:09,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829964644] [2021-06-12 22:32:09,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:32:09,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:09,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:32:09,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:32:09,334 INFO L87 Difference]: Start difference. First operand 50905 states and 197153 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:13,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:13,469 INFO L93 Difference]: Finished difference Result 83144 states and 313968 transitions. [2021-06-12 22:32:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:32:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:32:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:13,693 INFO L225 Difference]: With dead ends: 83144 [2021-06-12 22:32:13,693 INFO L226 Difference]: Without dead ends: 83114 [2021-06-12 22:32:13,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 3152.3ms TimeCoverageRelationStatistics Valid=1067, Invalid=4633, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:32:13,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83114 states. [2021-06-12 22:32:15,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83114 to 50927. [2021-06-12 22:32:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50927 states, 50926 states have (on average 3.873443820445352) internal successors, (197259), 50926 states have internal predecessors, (197259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50927 states to 50927 states and 197259 transitions. [2021-06-12 22:32:15,510 INFO L78 Accepts]: Start accepts. Automaton has 50927 states and 197259 transitions. Word has length 30 [2021-06-12 22:32:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:15,510 INFO L482 AbstractCegarLoop]: Abstraction has 50927 states and 197259 transitions. [2021-06-12 22:32:15,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 50927 states and 197259 transitions. [2021-06-12 22:32:15,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:15,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:15,584 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:15,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-12 22:32:15,785 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash 382550838, now seen corresponding path program 195 times [2021-06-12 22:32:15,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:15,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532305916] [2021-06-12 22:32:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:16,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532305916] [2021-06-12 22:32:16,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532305916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756150829] [2021-06-12 22:32:16,006 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:16,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:32:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:32:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:16,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:16,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 22:32:16,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:16,347 INFO L628 ElimStorePlain]: treesize reduction 51, result has 46.9 percent of original size [2021-06-12 22:32:16,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:32:16,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:83 [2021-06-12 22:32:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:16,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756150829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:16,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:16,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 22:32:16,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515032916] [2021-06-12 22:32:16,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:32:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:16,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:32:16,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:32:16,439 INFO L87 Difference]: Start difference. First operand 50927 states and 197259 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) [2021-06-12 22:32:17,150 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 22:32:19,406 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 22:32:19,939 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-12 22:32:20,447 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-12 22:32:21,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:21,324 INFO L93 Difference]: Finished difference Result 74529 states and 282265 transitions. [2021-06-12 22:32:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:32:21,324 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 [2021-06-12 22:32:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:21,531 INFO L225 Difference]: With dead ends: 74529 [2021-06-12 22:32:21,531 INFO L226 Difference]: Without dead ends: 74499 [2021-06-12 22:32:21,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 3563.8ms TimeCoverageRelationStatistics Valid=826, Invalid=4144, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:32:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74499 states. [2021-06-12 22:32:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74499 to 50939. [2021-06-12 22:32:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50939 states, 50938 states have (on average 3.8735717931603126) internal successors, (197312), 50938 states have internal predecessors, (197312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50939 states to 50939 states and 197312 transitions. [2021-06-12 22:32:23,292 INFO L78 Accepts]: Start accepts. Automaton has 50939 states and 197312 transitions. Word has length 30 [2021-06-12 22:32:23,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:23,292 INFO L482 AbstractCegarLoop]: Abstraction has 50939 states and 197312 transitions. [2021-06-12 22:32:23,292 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) [2021-06-12 22:32:23,292 INFO L276 IsEmpty]: Start isEmpty. Operand 50939 states and 197312 transitions. [2021-06-12 22:32:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:23,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:23,405 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:23,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-12 22:32:23,606 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash 956613558, now seen corresponding path program 196 times [2021-06-12 22:32:23,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:23,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774687347] [2021-06-12 22:32:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:23,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:23,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774687347] [2021-06-12 22:32:23,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774687347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:23,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131823547] [2021-06-12 22:32:23,785 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:23,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:32:23,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:23,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:32:23,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:24,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:24,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:24,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:32:24,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:24,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:32:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:24,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:32:24,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:24,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:24,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:24,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-12 22:32:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:24,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131823547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:24,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:24,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 22:32:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988339865] [2021-06-12 22:32:24,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:32:24,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:32:24,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:32:24,192 INFO L87 Difference]: Start difference. First operand 50939 states and 197312 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:32:29,045 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-12 22:32:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:31,080 INFO L93 Difference]: Finished difference Result 97250 states and 359275 transitions. [2021-06-12 22:32:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 22:32:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-06-12 22:32:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:31,333 INFO L225 Difference]: With dead ends: 97250 [2021-06-12 22:32:31,333 INFO L226 Difference]: Without dead ends: 97199 [2021-06-12 22:32:31,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 4857.3ms TimeCoverageRelationStatistics Valid=1104, Invalid=7452, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 22:32:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97199 states. [2021-06-12 22:32:32,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97199 to 51032. [2021-06-12 22:32:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51032 states, 51031 states have (on average 3.874292096960671) internal successors, (197709), 51031 states have internal predecessors, (197709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51032 states to 51032 states and 197709 transitions. [2021-06-12 22:32:33,115 INFO L78 Accepts]: Start accepts. Automaton has 51032 states and 197709 transitions. Word has length 30 [2021-06-12 22:32:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:33,115 INFO L482 AbstractCegarLoop]: Abstraction has 51032 states and 197709 transitions. [2021-06-12 22:32:33,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:32:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 51032 states and 197709 transitions. [2021-06-12 22:32:33,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:33,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:33,194 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:33,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:33,395 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash 354888434, now seen corresponding path program 197 times [2021-06-12 22:32:33,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:33,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684418877] [2021-06-12 22:32:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:33,677 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-06-12 22:32:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:33,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:33,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684418877] [2021-06-12 22:32:33,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684418877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:33,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947235033] [2021-06-12 22:32:33,827 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:33,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:32:33,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:33,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:32:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:34,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:34,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:34,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:34,089 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 27 treesize of output 39 [2021-06-12 22:32:34,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:32:34,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:34,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:32:34,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:23 [2021-06-12 22:32:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947235033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:34,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:34,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:32:34,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850213901] [2021-06-12 22:32:34,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:32:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:32:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:32:34,150 INFO L87 Difference]: Start difference. First operand 51032 states and 197709 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:37,690 INFO L93 Difference]: Finished difference Result 84956 states and 320071 transitions. [2021-06-12 22:32:37,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:32:37,691 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:32:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:37,933 INFO L225 Difference]: With dead ends: 84956 [2021-06-12 22:32:37,933 INFO L226 Difference]: Without dead ends: 84926 [2021-06-12 22:32:37,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 2778.3ms TimeCoverageRelationStatistics Valid=1060, Invalid=4052, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:32:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84926 states. [2021-06-12 22:32:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84926 to 51051. [2021-06-12 22:32:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51051 states, 51050 states have (on average 3.874828599412341) internal successors, (197810), 51050 states have internal predecessors, (197810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51051 states to 51051 states and 197810 transitions. [2021-06-12 22:32:39,773 INFO L78 Accepts]: Start accepts. Automaton has 51051 states and 197810 transitions. Word has length 30 [2021-06-12 22:32:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:39,773 INFO L482 AbstractCegarLoop]: Abstraction has 51051 states and 197810 transitions. [2021-06-12 22:32:39,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 51051 states and 197810 transitions. [2021-06-12 22:32:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:39,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:39,852 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:40,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:40,053 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:40,053 INFO L82 PathProgramCache]: Analyzing trace with hash 375624962, now seen corresponding path program 198 times [2021-06-12 22:32:40,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:40,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326466140] [2021-06-12 22:32:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:40,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:40,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326466140] [2021-06-12 22:32:40,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326466140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:40,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85612860] [2021-06-12 22:32:40,256 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:40,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:32:40,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:32:40,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:40,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:32:40,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:40,594 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 4 case distinctions, treesize of input 27 treesize of output 31 [2021-06-12 22:32:40,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:40,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:40,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:40,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-12 22:32:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:40,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85612860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:40,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:40,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 22:32:40,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452483731] [2021-06-12 22:32:40,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:32:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:32:40,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:32:40,616 INFO L87 Difference]: Start difference. First operand 51051 states and 197810 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) [2021-06-12 22:32:43,021 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-12 22:32:43,635 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-12 22:32:43,974 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-06-12 22:32:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:44,798 INFO L93 Difference]: Finished difference Result 78799 states and 296374 transitions. [2021-06-12 22:32:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:32:44,799 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 [2021-06-12 22:32:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:44,987 INFO L225 Difference]: With dead ends: 78799 [2021-06-12 22:32:44,987 INFO L226 Difference]: Without dead ends: 78784 [2021-06-12 22:32:44,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 3147.7ms TimeCoverageRelationStatistics Valid=747, Invalid=3543, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:32:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78784 states. [2021-06-12 22:32:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78784 to 51046. [2021-06-12 22:32:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51046 states, 51045 states have (on average 3.8747771574101284) internal successors, (197788), 51045 states have internal predecessors, (197788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51046 states to 51046 states and 197788 transitions. [2021-06-12 22:32:46,525 INFO L78 Accepts]: Start accepts. Automaton has 51046 states and 197788 transitions. Word has length 30 [2021-06-12 22:32:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:46,525 INFO L482 AbstractCegarLoop]: Abstraction has 51046 states and 197788 transitions. [2021-06-12 22:32:46,526 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) [2021-06-12 22:32:46,526 INFO L276 IsEmpty]: Start isEmpty. Operand 51046 states and 197788 transitions. [2021-06-12 22:32:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:46,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:46,607 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:46,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 289 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-12 22:32:46,808 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2136041370, now seen corresponding path program 199 times [2021-06-12 22:32:46,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:46,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407463614] [2021-06-12 22:32:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:46,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:46,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407463614] [2021-06-12 22:32:46,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407463614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:46,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552634592] [2021-06-12 22:32:46,990 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:32:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:47,455 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-12 22:32:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:32:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:47,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:32:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:32:47,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:47,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:47,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:47,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:22 [2021-06-12 22:32:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:47,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552634592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:47,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:47,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-12 22:32:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112621437] [2021-06-12 22:32:47,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:32:47,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:32:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:32:47,661 INFO L87 Difference]: Start difference. First operand 51046 states and 197788 transitions. Second operand has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:32:49,244 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-12 22:32:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:53,762 INFO L93 Difference]: Finished difference Result 96322 states and 356717 transitions. [2021-06-12 22:32:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:32:53,762 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) 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 [2021-06-12 22:32:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:54,008 INFO L225 Difference]: With dead ends: 96322 [2021-06-12 22:32:54,009 INFO L226 Difference]: Without dead ends: 96271 [2021-06-12 22:32:54,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 4957.7ms TimeCoverageRelationStatistics Valid=1004, Invalid=6478, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:32:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96271 states. [2021-06-12 22:32:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96271 to 51050. [2021-06-12 22:32:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51050 states, 51049 states have (on average 3.874826147426982) internal successors, (197806), 51049 states have internal predecessors, (197806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51050 states to 51050 states and 197806 transitions. [2021-06-12 22:32:55,866 INFO L78 Accepts]: Start accepts. Automaton has 51050 states and 197806 transitions. Word has length 30 [2021-06-12 22:32:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:55,867 INFO L482 AbstractCegarLoop]: Abstraction has 51050 states and 197806 transitions. [2021-06-12 22:32:55,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) 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) [2021-06-12 22:32:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 51050 states and 197806 transitions. [2021-06-12 22:32:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:32:55,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:55,937 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:56,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-12 22:32:56,138 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:56,138 INFO L82 PathProgramCache]: Analyzing trace with hash -302392718, now seen corresponding path program 200 times [2021-06-12 22:32:56,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:56,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606922997] [2021-06-12 22:32:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:56,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:56,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606922997] [2021-06-12 22:32:56,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606922997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:56,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198066377] [2021-06-12 22:32:56,318 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:56,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:32:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:32:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:56,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:56,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:56,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:32:56,561 INFO L354 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2021-06-12 22:32:56,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 82 treesize of output 80 [2021-06-12 22:32:56,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:32:56,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:32:56,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:32:56,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:22 [2021-06-12 22:32:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:56,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198066377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:56,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:56,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:32:56,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105642508] [2021-06-12 22:32:56,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:32:56,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:56,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:32:56,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:32:56,625 INFO L87 Difference]: Start difference. First operand 51050 states and 197806 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-06-12 22:33:00,424 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 22:33:00,920 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-06-12 22:33:01,664 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-12 22:33:02,233 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-12 22:33:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:03,378 INFO L93 Difference]: Finished difference Result 98122 states and 365133 transitions. [2021-06-12 22:33:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 22:33:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 [2021-06-12 22:33:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:03,809 INFO L225 Difference]: With dead ends: 98122 [2021-06-12 22:33:03,809 INFO L226 Difference]: Without dead ends: 98092 [2021-06-12 22:33:03,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 4919.6ms TimeCoverageRelationStatistics Valid=993, Invalid=6839, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:33:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98092 states. [2021-06-12 22:33:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98092 to 51052. [2021-06-12 22:33:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51052 states, 51051 states have (on average 3.874850639556522) internal successors, (197815), 51051 states have internal predecessors, (197815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51052 states to 51052 states and 197815 transitions. [2021-06-12 22:33:05,377 INFO L78 Accepts]: Start accepts. Automaton has 51052 states and 197815 transitions. Word has length 30 [2021-06-12 22:33:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:05,377 INFO L482 AbstractCegarLoop]: Abstraction has 51052 states and 197815 transitions. [2021-06-12 22:33:05,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-06-12 22:33:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 51052 states and 197815 transitions. [2021-06-12 22:33:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:33:05,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:05,461 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:05,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:05,661 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:05,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash -225306266, now seen corresponding path program 201 times [2021-06-12 22:33:05,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:05,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659082933] [2021-06-12 22:33:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:05,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:05,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659082933] [2021-06-12 22:33:05,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659082933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:05,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55700073] [2021-06-12 22:33:05,869 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:06,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:33:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:33:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:06,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:06,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-12 22:33:06,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:33:06,548 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-06-12 22:33:06,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:33:06,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-06-12 22:33:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:06,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55700073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:06,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:06,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 22:33:06,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462066981] [2021-06-12 22:33:06,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:33:06,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:33:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:33:06,673 INFO L87 Difference]: Start difference. First operand 51052 states and 197815 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) [2021-06-12 22:33:07,908 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-06-12 22:33:09,711 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-12 22:33:09,906 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-12 22:33:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:11,183 INFO L93 Difference]: Finished difference Result 63398 states and 235417 transitions. [2021-06-12 22:33:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:33:11,183 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 [2021-06-12 22:33:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:11,472 INFO L225 Difference]: With dead ends: 63398 [2021-06-12 22:33:11,472 INFO L226 Difference]: Without dead ends: 63290 [2021-06-12 22:33:11,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3529.6ms TimeCoverageRelationStatistics Valid=699, Invalid=3333, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:33:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63290 states. [2021-06-12 22:33:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63290 to 51149. [2021-06-12 22:33:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51149 states, 51148 states have (on average 3.875674513177446) internal successors, (198233), 51148 states have internal predecessors, (198233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51149 states to 51149 states and 198233 transitions. [2021-06-12 22:33:12,881 INFO L78 Accepts]: Start accepts. Automaton has 51149 states and 198233 transitions. Word has length 30 [2021-06-12 22:33:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:12,881 INFO L482 AbstractCegarLoop]: Abstraction has 51149 states and 198233 transitions. [2021-06-12 22:33:12,881 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) [2021-06-12 22:33:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 51149 states and 198233 transitions. [2021-06-12 22:33:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:33:12,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:12,959 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:13,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-12 22:33:13,160 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:13,160 INFO L82 PathProgramCache]: Analyzing trace with hash 348756454, now seen corresponding path program 202 times [2021-06-12 22:33:13,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:13,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452328344] [2021-06-12 22:33:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:13,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:13,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452328344] [2021-06-12 22:33:13,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452328344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:13,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38703171] [2021-06-12 22:33:13,329 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:13,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:33:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:13,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:33:13,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:33:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:13,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:33:13,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 22:33:13,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:33:13,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:13,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:33:13,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-12 22:33:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:13,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38703171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:13,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:13,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:33:13,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741378913] [2021-06-12 22:33:13,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:33:13,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:33:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:33:13,649 INFO L87 Difference]: Start difference. First operand 51149 states and 198233 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) [2021-06-12 22:33:14,457 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-12 22:33:16,182 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 22:33:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:18,518 INFO L93 Difference]: Finished difference Result 90253 states and 334745 transitions. [2021-06-12 22:33:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:33:18,519 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 [2021-06-12 22:33:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:18,763 INFO L225 Difference]: With dead ends: 90253 [2021-06-12 22:33:18,763 INFO L226 Difference]: Without dead ends: 90208 [2021-06-12 22:33:18,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 3448.5ms TimeCoverageRelationStatistics Valid=745, Invalid=5417, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 22:33:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90208 states. [2021-06-12 22:33:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90208 to 51198. [2021-06-12 22:33:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875871633103502) internal successors, (198433), 51197 states have internal predecessors, (198433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:20,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198433 transitions. [2021-06-12 22:33:20,551 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198433 transitions. Word has length 30 [2021-06-12 22:33:20,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:20,551 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198433 transitions. [2021-06-12 22:33:20,551 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) [2021-06-12 22:33:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198433 transitions. [2021-06-12 22:33:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:33:20,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:20,632 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:20,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:20,832 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1442848042, now seen corresponding path program 203 times [2021-06-12 22:33:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:20,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703148656] [2021-06-12 22:33:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:21,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:21,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703148656] [2021-06-12 22:33:21,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703148656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:21,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600075106] [2021-06-12 22:33:21,049 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:21,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:33:21,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:33:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:21,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:21,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:21,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:21,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:21,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:21,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2021-06-12 22:33:21,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:33:21,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:21,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:33:21,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:22 [2021-06-12 22:33:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:21,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600075106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:21,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:21,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:33:21,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922990784] [2021-06-12 22:33:21,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:33:21,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:21,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:33:21,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:33:21,375 INFO L87 Difference]: Start difference. First operand 51198 states and 198433 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-06-12 22:33:23,515 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-12 22:33:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:27,833 INFO L93 Difference]: Finished difference Result 89164 states and 331673 transitions. [2021-06-12 22:33:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:33:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 [2021-06-12 22:33:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:28,070 INFO L225 Difference]: With dead ends: 89164 [2021-06-12 22:33:28,070 INFO L226 Difference]: Without dead ends: 89134 [2021-06-12 22:33:28,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 4007.6ms TimeCoverageRelationStatistics Valid=760, Invalid=7796, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 22:33:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89134 states. [2021-06-12 22:33:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89134 to 51198. [2021-06-12 22:33:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51198 states, 51197 states have (on average 3.875754438736645) internal successors, (198427), 51197 states have internal predecessors, (198427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51198 states to 51198 states and 198427 transitions. [2021-06-12 22:33:29,952 INFO L78 Accepts]: Start accepts. Automaton has 51198 states and 198427 transitions. Word has length 30 [2021-06-12 22:33:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:29,952 INFO L482 AbstractCegarLoop]: Abstraction has 51198 states and 198427 transitions. [2021-06-12 22:33:29,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2021-06-12 22:33:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 51198 states and 198427 transitions. [2021-06-12 22:33:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:33:30,045 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:30,045 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:30,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:30,245 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:30,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:30,246 INFO L82 PathProgramCache]: Analyzing trace with hash -703322718, now seen corresponding path program 204 times [2021-06-12 22:33:30,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:30,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811524050] [2021-06-12 22:33:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:30,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:30,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811524050] [2021-06-12 22:33:30,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811524050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:30,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575234646] [2021-06-12 22:33:30,417 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:30,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:33:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:33:30,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:30,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:33:30,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:33:30,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 22:33:30,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:33:30,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:30,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:33:30,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-12 22:33:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:30,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575234646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:30,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:30,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:33:30,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390355663] [2021-06-12 22:33:30,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:33:30,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:33:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:33:30,736 INFO L87 Difference]: Start difference. First operand 51198 states and 198427 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) [2021-06-12 22:33:31,495 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-12 22:33:33,259 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-12 22:33:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:35,878 INFO L93 Difference]: Finished difference Result 100466 states and 369497 transitions. [2021-06-12 22:33:35,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:33:35,878 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 [2021-06-12 22:33:35,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:36,181 INFO L225 Difference]: With dead ends: 100466 [2021-06-12 22:33:36,181 INFO L226 Difference]: Without dead ends: 100421 [2021-06-12 22:33:36,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 3868.2ms TimeCoverageRelationStatistics Valid=949, Invalid=6191, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:33:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100421 states. [2021-06-12 22:33:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100421 to 51219. [2021-06-12 22:33:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51219 states, 51218 states have (on average 3.875727283376938) internal successors, (198507), 51218 states have internal predecessors, (198507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51219 states to 51219 states and 198507 transitions. [2021-06-12 22:33:38,024 INFO L78 Accepts]: Start accepts. Automaton has 51219 states and 198507 transitions. Word has length 30 [2021-06-12 22:33:38,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:38,024 INFO L482 AbstractCegarLoop]: Abstraction has 51219 states and 198507 transitions. [2021-06-12 22:33:38,024 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) [2021-06-12 22:33:38,024 INFO L276 IsEmpty]: Start isEmpty. Operand 51219 states and 198507 transitions. [2021-06-12 22:33:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:33:38,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:38,108 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:38,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:38,308 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash 103853306, now seen corresponding path program 205 times [2021-06-12 22:33:38,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:38,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750971662] [2021-06-12 22:33:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:38,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:38,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750971662] [2021-06-12 22:33:38,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750971662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:38,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695766911] [2021-06-12 22:33:38,527 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:33:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:38,834 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-12 22:33:39,093 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-06-12 22:33:39,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 53 [2021-06-12 22:33:39,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:33:39,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:39,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:33:39,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:5 [2021-06-12 22:33:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:39,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695766911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:39,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:39,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:33:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556784526] [2021-06-12 22:33:39,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:33:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:33:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:33:39,117 INFO L87 Difference]: Start difference. First operand 51219 states and 198507 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) [2021-06-12 22:33:40,527 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-12 22:33:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:41,545 INFO L93 Difference]: Finished difference Result 72664 states and 274266 transitions. [2021-06-12 22:33:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:33:41,546 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 [2021-06-12 22:33:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:41,735 INFO L225 Difference]: With dead ends: 72664 [2021-06-12 22:33:41,735 INFO L226 Difference]: Without dead ends: 72586 [2021-06-12 22:33:41,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1922.8ms TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:33:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72586 states. [2021-06-12 22:33:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72586 to 51288. [2021-06-12 22:33:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51288 states, 51287 states have (on average 3.8757969855908905) internal successors, (198778), 51287 states have internal predecessors, (198778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51288 states to 51288 states and 198778 transitions. [2021-06-12 22:33:43,388 INFO L78 Accepts]: Start accepts. Automaton has 51288 states and 198778 transitions. Word has length 30 [2021-06-12 22:33:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:43,388 INFO L482 AbstractCegarLoop]: Abstraction has 51288 states and 198778 transitions. [2021-06-12 22:33:43,389 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) [2021-06-12 22:33:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51288 states and 198778 transitions. [2021-06-12 22:33:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:33:43,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:43,467 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:43,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-12 22:33:43,668 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1693723682, now seen corresponding path program 206 times [2021-06-12 22:33:43,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:43,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568932502] [2021-06-12 22:33:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:43,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:43,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568932502] [2021-06-12 22:33:43,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568932502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:43,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100043729] [2021-06-12 22:33:43,878 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:43,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:33:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:33:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:44,088 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-06-12 22:33:44,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 66 [2021-06-12 22:33:44,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:33:44,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:44,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:33:44,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:17 [2021-06-12 22:33:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:44,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100043729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:44,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:44,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:33:44,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980729546] [2021-06-12 22:33:44,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:33:44,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:44,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:33:44,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:33:44,138 INFO L87 Difference]: Start difference. First operand 51288 states and 198778 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) [2021-06-12 22:33:44,649 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 27 [2021-06-12 22:33:46,379 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-12 22:33:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:47,790 INFO L93 Difference]: Finished difference Result 74850 states and 281175 transitions. [2021-06-12 22:33:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:33:47,791 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 [2021-06-12 22:33:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:47,983 INFO L225 Difference]: With dead ends: 74850 [2021-06-12 22:33:47,983 INFO L226 Difference]: Without dead ends: 74784 [2021-06-12 22:33:47,984 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2646.4ms TimeCoverageRelationStatistics Valid=630, Invalid=2792, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:33:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74784 states. [2021-06-12 22:33:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74784 to 51286. [2021-06-12 22:33:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51286 states, 51285 states have (on average 3.8756556498001364) internal successors, (198763), 51285 states have internal predecessors, (198763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51286 states to 51286 states and 198763 transitions. [2021-06-12 22:33:49,453 INFO L78 Accepts]: Start accepts. Automaton has 51286 states and 198763 transitions. Word has length 30 [2021-06-12 22:33:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:49,453 INFO L482 AbstractCegarLoop]: Abstraction has 51286 states and 198763 transitions. [2021-06-12 22:33:49,453 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) [2021-06-12 22:33:49,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51286 states and 198763 transitions. [2021-06-12 22:33:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:33:49,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:49,531 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:49,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-12 22:33:49,732 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2086344974, now seen corresponding path program 207 times [2021-06-12 22:33:49,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:49,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786916883] [2021-06-12 22:33:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:49,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786916883] [2021-06-12 22:33:49,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786916883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:49,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008938302] [2021-06-12 22:33:49,898 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:49,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:33:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:49,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:33:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:33:50,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:33:50,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 79 [2021-06-12 22:33:50,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:33:51,001 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 73 [2021-06-12 22:33:51,002 INFO L628 ElimStorePlain]: treesize reduction 588, result has 22.5 percent of original size [2021-06-12 22:33:51,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:33:51,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:756 [2021-06-12 22:33:51,527 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-06-12 22:33:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:51,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008938302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:51,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:51,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-12 22:33:51,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837321287] [2021-06-12 22:33:51,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:33:51,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:51,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:33:51,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:33:51,710 INFO L87 Difference]: Start difference. First operand 51286 states and 198763 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2021-06-12 22:33:52,689 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 39 [2021-06-12 22:33:57,106 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-12 22:33:57,383 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-12 22:33:57,630 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-12 22:33:57,774 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-06-12 22:33:58,022 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-06-12 22:33:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:58,408 INFO L93 Difference]: Finished difference Result 99242 states and 366200 transitions. [2021-06-12 22:33:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 22:33:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 [2021-06-12 22:33:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:58,856 INFO L225 Difference]: With dead ends: 99242 [2021-06-12 22:33:58,856 INFO L226 Difference]: Without dead ends: 99212 [2021-06-12 22:33:58,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 5863.3ms TimeCoverageRelationStatistics Valid=882, Invalid=6774, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:33:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99212 states. [2021-06-12 22:34:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99212 to 51295. [2021-06-12 22:34:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51295 states, 51294 states have (on average 3.875560494404804) internal successors, (198793), 51294 states have internal predecessors, (198793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51295 states to 51295 states and 198793 transitions. [2021-06-12 22:34:00,447 INFO L78 Accepts]: Start accepts. Automaton has 51295 states and 198793 transitions. Word has length 30 [2021-06-12 22:34:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:00,447 INFO L482 AbstractCegarLoop]: Abstraction has 51295 states and 198793 transitions. [2021-06-12 22:34:00,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2021-06-12 22:34:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 51295 states and 198793 transitions. [2021-06-12 22:34:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:34:00,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:00,524 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:00,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:00,725 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:00,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:00,725 INFO L82 PathProgramCache]: Analyzing trace with hash 714714600, now seen corresponding path program 208 times [2021-06-12 22:34:00,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:00,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027582967] [2021-06-12 22:34:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:00,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:00,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027582967] [2021-06-12 22:34:00,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027582967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:00,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75140520] [2021-06-12 22:34:00,910 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:00,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:00,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:00,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:34:00,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:01,224 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-12 22:34:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:01,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:34:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:01,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:34:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-12 22:34:01,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:34:01,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:34:01,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:34:01,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:5 [2021-06-12 22:34:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:01,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75140520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:01,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:01,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:34:01,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500935600] [2021-06-12 22:34:01,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:34:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:34:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:34:01,531 INFO L87 Difference]: Start difference. First operand 51295 states and 198793 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) [2021-06-12 22:34:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:05,688 INFO L93 Difference]: Finished difference Result 88709 states and 330422 transitions. [2021-06-12 22:34:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:34:05,688 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 [2021-06-12 22:34:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:05,906 INFO L225 Difference]: With dead ends: 88709 [2021-06-12 22:34:05,907 INFO L226 Difference]: Without dead ends: 88679 [2021-06-12 22:34:05,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 3066.8ms TimeCoverageRelationStatistics Valid=694, Invalid=4276, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:34:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88679 states. [2021-06-12 22:34:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88679 to 51308. [2021-06-12 22:34:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51308 states, 51307 states have (on average 3.8756504960336797) internal successors, (198848), 51307 states have internal predecessors, (198848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51308 states to 51308 states and 198848 transitions. [2021-06-12 22:34:07,635 INFO L78 Accepts]: Start accepts. Automaton has 51308 states and 198848 transitions. Word has length 30 [2021-06-12 22:34:07,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:07,635 INFO L482 AbstractCegarLoop]: Abstraction has 51308 states and 198848 transitions. [2021-06-12 22:34:07,635 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) [2021-06-12 22:34:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 51308 states and 198848 transitions. [2021-06-12 22:34:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:34:07,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:07,714 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:07,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable621,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:07,914 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:07,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1077811610, now seen corresponding path program 209 times [2021-06-12 22:34:07,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:07,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011255631] [2021-06-12 22:34:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:08,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:08,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011255631] [2021-06-12 22:34:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011255631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985759580] [2021-06-12 22:34:08,079 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:08,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:34:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:34:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:08,641 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-12 22:34:08,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:34:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:34:08,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:34:08,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:34:08,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:34:08,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:34:08,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:34:08,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:5 [2021-06-12 22:34:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:08,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985759580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:08,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:08,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:34:08,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686657943] [2021-06-12 22:34:08,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:34:08,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:08,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:34:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:34:08,722 INFO L87 Difference]: Start difference. First operand 51308 states and 198848 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) [2021-06-12 22:34:10,439 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-12 22:34:13,694 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-12 22:34:13,970 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-06-12 22:34:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:14,638 INFO L93 Difference]: Finished difference Result 100753 states and 371531 transitions. [2021-06-12 22:34:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:34:14,639 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 [2021-06-12 22:34:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:14,902 INFO L225 Difference]: With dead ends: 100753 [2021-06-12 22:34:14,902 INFO L226 Difference]: Without dead ends: 100723 [2021-06-12 22:34:14,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 4369.7ms TimeCoverageRelationStatistics Valid=829, Invalid=4721, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:34:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100723 states. Received shutdown request... [2021-06-12 22:34:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100723 to 51325. [2021-06-12 22:34:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51325 states, 51324 states have (on average 3.875944977008807) internal successors, (198929), 51324 states have internal predecessors, (198929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:16,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-12 22:34:16,645 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 22:34:16,647 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:34:16,648 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 22:34:16,648 INFO L202 PluginConnector]: Adding new model sum-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:34:16 BasicIcfg [2021-06-12 22:34:16,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:34:16,649 INFO L168 Benchmark]: Toolchain (without parser) took 749758.80 ms. Allocated memory was 185.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 165.6 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.1 GB. Max. memory is 8.0 GB. [2021-06-12 22:34:16,649 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:34:16,649 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.32 ms. Allocated memory is still 185.6 MB. Free memory was 165.5 MB in the beginning and 164.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:34:16,649 INFO L168 Benchmark]: Boogie Preprocessor took 15.00 ms. Allocated memory is still 185.6 MB. Free memory was 164.0 MB in the beginning and 163.1 MB in the end (delta: 978.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:34:16,649 INFO L168 Benchmark]: RCFGBuilder took 255.67 ms. Allocated memory is still 185.6 MB. Free memory was 163.0 MB in the beginning and 150.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 22:34:16,649 INFO L168 Benchmark]: TraceAbstraction took 749455.80 ms. Allocated memory was 185.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 149.5 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.0 GB. Max. memory is 8.0 GB. [2021-06-12 22:34:16,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 166.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.32 ms. Allocated memory is still 185.6 MB. Free memory was 165.5 MB in the beginning and 164.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.00 ms. Allocated memory is still 185.6 MB. Free memory was 164.0 MB in the beginning and 163.1 MB in the end (delta: 978.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 255.67 ms. Allocated memory is still 185.6 MB. Free memory was 163.0 MB in the beginning and 150.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 749455.80 ms. Allocated memory was 185.6 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 149.5 MB in the beginning and 5.0 GB in the end (delta: -4.8 GB). Peak memory consumption was 3.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 749353.2ms, OverallIterations: 301, TraceHistogramMax: 3, EmptinessCheckTime: 11321.3ms, AutomataDifference: 422162.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 30.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14874 SDtfs, 84142 SDslu, 125929 SDs, 0 SdLazy, 209418 SolverSat, 14951 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 103400.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20030 GetRequests, 6326 SyntacticMatches, 372 SemanticMatches, 13332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235234 ImplicationChecksByTransitivity, 290655.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55780occurred in iteration=259, InterpolantAutomatonStates: 11693, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 154553.1ms AutomataMinimizationTime, 301 MinimizatonAttempts, 2390324 StatesRemovedByMinimization, 299 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 994.6ms SsaConstructionTime, 3022.4ms SatisfiabilityAnalysisTime, 89148.9ms InterpolantComputationTime, 16258 NumberOfCodeBlocks, 16258 NumberOfCodeBlocksAsserted, 1048 NumberOfCheckSat, 15658 ConstructedInterpolants, 386 QuantifiedInterpolants, 189183 SizeOfPredicates, 1439 NumberOfNonLiveVariables, 21172 ConjunctsInSsa, 5237 ConjunctsInUnsatCore, 600 InterpolantComputations, 2 PerfectInterpolantSequences, 1056/5497 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown