/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:28:45,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:28:45,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:28:45,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:28:45,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:28:45,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:28:45,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:28:45,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:28:45,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:28:45,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:28:45,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:28:45,915 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:28:45,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:28:45,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:28:45,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:28:45,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:28:45,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:28:45,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:28:45,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:28:45,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:28:45,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:28:45,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:28:45,917 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:28:45,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:28:45,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:28:45,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:28:45,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:28:45,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:28:45,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:28:46,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:28:46,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:28:46,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:28:46,230 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:28:46,231 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:28:46,231 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl [2021-03-11 00:28:46,232 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl' [2021-03-11 00:28:46,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:28:46,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:28:46,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:28:46,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:28:46,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:28:46,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:28:46,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:28:46,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:28:46,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:28:46,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/1) ... [2021-03-11 00:28:46,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:28:46,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:28:46,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:28:46,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:28:46,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (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 [2021-03-11 00:28:46,384 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:28:46,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:28:46,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:28:46,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:28:46,385 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:28:46,385 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:28:46,385 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:28:46,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:28:46,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:28:46,386 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:28:46,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:28:46,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:28:46,388 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:28:46,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:28:46,599 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:28:46,600 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:28:46 BoogieIcfgContainer [2021-03-11 00:28:46,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:28:46,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:28:46,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:28:46,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:28:46,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:28:46" (1/2) ... [2021-03-11 00:28:46,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acb253b and model type sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:28:46, skipping insertion in model container [2021-03-11 00:28:46,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:28:46" (2/2) ... [2021-03-11 00:28:46,605 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun.wvr.bpl [2021-03-11 00:28:46,608 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:28:46,609 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:28:46,611 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:28:46,611 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:28:46,632 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:28:46,642 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:28:46,676 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:28:46,676 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:28:46,676 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:28:46,676 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:28:46,676 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:28:46,676 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:28:46,676 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:28:46,676 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:28:46,682 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-11 00:28:46,693 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) [2021-03-11 00:28:46,695 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) [2021-03-11 00:28:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:28:46,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:46,701 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:46,702 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:46,705 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-03-11 00:28:46,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:46,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381772868] [2021-03-11 00:28:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:46,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381772868] [2021-03-11 00:28:46,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:28:46,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:28:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615503365] [2021-03-11 00:28:46,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:28:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:46,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:28:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:28:46,866 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) [2021-03-11 00:28:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:46,934 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-03-11 00:28:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:28:46,935 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 [2021-03-11 00:28:46,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:46,945 INFO L225 Difference]: With dead ends: 154 [2021-03-11 00:28:46,946 INFO L226 Difference]: Without dead ends: 154 [2021-03-11 00:28:46,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:28:46,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-11 00:28:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-03-11 00:28:46,996 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) [2021-03-11 00:28:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-11 00:28:47,001 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-03-11 00:28:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:47,002 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-11 00:28:47,002 INFO L481 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) [2021-03-11 00:28:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-11 00:28:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:28:47,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:47,004 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:47,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:28:47,004 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-03-11 00:28:47,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:47,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646714251] [2021-03-11 00:28:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:47,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646714251] [2021-03-11 00:28:47,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:28:47,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:28:47,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715825613] [2021-03-11 00:28:47,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:28:47,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:28:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:28:47,062 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) [2021-03-11 00:28:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:47,094 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-03-11 00:28:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:28:47,095 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 [2021-03-11 00:28:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:47,097 INFO L225 Difference]: With dead ends: 158 [2021-03-11 00:28:47,097 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:28:47,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:28:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:28:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-03-11 00:28:47,117 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) [2021-03-11 00:28:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-11 00:28:47,118 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-11 00:28:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:47,118 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-11 00:28:47,118 INFO L481 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) [2021-03-11 00:28:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-11 00:28:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:28:47,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:47,119 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:47,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:28:47,119 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-03-11 00:28:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:47,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271795054] [2021-03-11 00:28:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:47,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271795054] [2021-03-11 00:28:47,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99159548] [2021-03-11 00:28:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:47,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:28:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:47,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:28:47,699 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 [2021-03-11 00:28:47,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:47,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:47,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:47,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-03-11 00:28:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:47,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:47,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:28:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761986630] [2021-03-11 00:28:47,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:28:47,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:47,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:28:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:28:47,743 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) [2021-03-11 00:28:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:47,997 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-03-11 00:28:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:28:47,998 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 [2021-03-11 00:28:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:48,001 INFO L225 Difference]: With dead ends: 330 [2021-03-11 00:28:48,001 INFO L226 Difference]: Without dead ends: 315 [2021-03-11 00:28:48,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:28:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-11 00:28:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-03-11 00:28:48,011 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) [2021-03-11 00:28:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-11 00:28:48,012 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-11 00:28:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:48,012 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-11 00:28:48,013 INFO L481 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) [2021-03-11 00:28:48,013 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-11 00:28:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:28:48,014 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:48,014 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:48,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-11 00:28:48,223 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-03-11 00:28:48,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:48,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160554881] [2021-03-11 00:28:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:48,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160554881] [2021-03-11 00:28:48,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956794813] [2021-03-11 00:28:48,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:48,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:48,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:48,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:28:48,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:48,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:48,731 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 [2021-03-11 00:28:48,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:28:48,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:48,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:48,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-03-11 00:28:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:48,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:48,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-11 00:28:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051619079] [2021-03-11 00:28:48,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:48,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:48,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:48,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:48,828 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) [2021-03-11 00:28:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:49,225 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-11 00:28:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:28:49,225 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 [2021-03-11 00:28:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:49,227 INFO L225 Difference]: With dead ends: 374 [2021-03-11 00:28:49,228 INFO L226 Difference]: Without dead ends: 359 [2021-03-11 00:28:49,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:28:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-11 00:28:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-11 00:28:49,236 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) [2021-03-11 00:28:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-11 00:28:49,237 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-11 00:28:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:49,237 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-11 00:28:49,237 INFO L481 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) [2021-03-11 00:28:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-11 00:28:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:28:49,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:49,239 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:49,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:49,460 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-03-11 00:28:49,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:49,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446752968] [2021-03-11 00:28:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:49,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446752968] [2021-03-11 00:28:49,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700054064] [2021-03-11 00:28:49,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:28:49,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:28:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:49,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:49,805 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 [2021-03-11 00:28:49,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:28:49,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:49,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:49,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-03-11 00:28:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:49,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:49,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:28:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424765137] [2021-03-11 00:28:49,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:28:49,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:28:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:28:49,856 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) [2021-03-11 00:28:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:49,997 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-03-11 00:28:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:28:49,998 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 [2021-03-11 00:28:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:50,001 INFO L225 Difference]: With dead ends: 296 [2021-03-11 00:28:50,001 INFO L226 Difference]: Without dead ends: 281 [2021-03-11 00:28:50,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:28:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-11 00:28:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-03-11 00:28:50,008 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) [2021-03-11 00:28:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-11 00:28:50,010 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-11 00:28:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:50,010 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-11 00:28:50,010 INFO L481 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) [2021-03-11 00:28:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-11 00:28:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:28:50,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:50,014 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:50,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:50,229 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:50,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-03-11 00:28:50,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:50,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090670643] [2021-03-11 00:28:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:50,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090670643] [2021-03-11 00:28:50,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285028547] [2021-03-11 00:28:50,414 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) [2021-03-11 00:28:50,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:28:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:50,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:50,534 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 [2021-03-11 00:28:50,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:28:50,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:28:50,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:28:50,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-03-11 00:28:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:50,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:50,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:28:50,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268702287] [2021-03-11 00:28:50,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:28:50,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:50,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:28:50,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:28:50,600 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) [2021-03-11 00:28:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:50,781 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-11 00:28:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:28:50,781 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 [2021-03-11 00:28:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:50,783 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:28:50,783 INFO L226 Difference]: Without dead ends: 410 [2021-03-11 00:28:50,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:28:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-11 00:28:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-11 00:28:50,788 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) [2021-03-11 00:28:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-11 00:28:50,789 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-11 00:28:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:50,789 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-11 00:28:50,789 INFO L481 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) [2021-03-11 00:28:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-11 00:28:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:50,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:50,790 INFO L519 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] [2021-03-11 00:28:51,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:51,010 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-03-11 00:28:51,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:51,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015965124] [2021-03-11 00:28:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:51,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015965124] [2021-03-11 00:28:51,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513456218] [2021-03-11 00:28:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:51,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:28:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:51,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:51,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:51,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:28:51,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270135077] [2021-03-11 00:28:51,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:28:51,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:28:51,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:28:51,163 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) [2021-03-11 00:28:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:51,548 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-11 00:28:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:28:51,549 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 [2021-03-11 00:28:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:51,553 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:28:51,553 INFO L226 Difference]: Without dead ends: 619 [2021-03-11 00:28:51,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:28:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-11 00:28:51,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-11 00:28:51,564 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) [2021-03-11 00:28:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-11 00:28:51,566 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-11 00:28:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:51,567 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-11 00:28:51,568 INFO L481 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) [2021-03-11 00:28:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-11 00:28:51,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:51,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:51,569 INFO L519 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] [2021-03-11 00:28:51,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-11 00:28:51,783 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-03-11 00:28:51,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:51,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999545635] [2021-03-11 00:28:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:51,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999545635] [2021-03-11 00:28:51,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533430309] [2021-03-11 00:28:51,834 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 [2021-03-11 00:28:51,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:28:51,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:51,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:51,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:28:51,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213289289] [2021-03-11 00:28:51,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:51,958 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) [2021-03-11 00:28:52,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:52,678 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-11 00:28:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:28:52,679 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 [2021-03-11 00:28:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:52,683 INFO L225 Difference]: With dead ends: 1078 [2021-03-11 00:28:52,684 INFO L226 Difference]: Without dead ends: 1078 [2021-03-11 00:28:52,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:28:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-11 00:28:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-11 00:28:52,698 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) [2021-03-11 00:28:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-11 00:28:52,699 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-11 00:28:52,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:52,700 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-11 00:28:52,700 INFO L481 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) [2021-03-11 00:28:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-11 00:28:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:52,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:52,705 INFO L519 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] [2021-03-11 00:28:52,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:52,919 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-03-11 00:28:52,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:52,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498769598] [2021-03-11 00:28:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:52,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498769598] [2021-03-11 00:28:52,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153187007] [2021-03-11 00:28:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:28:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:53,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:53,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:28:53,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524855540] [2021-03-11 00:28:53,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:53,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:53,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:53,105 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) [2021-03-11 00:28:53,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:53,767 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-11 00:28:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:28:53,768 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 [2021-03-11 00:28:53,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:53,772 INFO L225 Difference]: With dead ends: 951 [2021-03-11 00:28:53,772 INFO L226 Difference]: Without dead ends: 951 [2021-03-11 00:28:53,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 406.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:28:53,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-11 00:28:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-11 00:28:53,785 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) [2021-03-11 00:28:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-11 00:28:53,786 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-11 00:28:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:53,787 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-11 00:28:53,787 INFO L481 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) [2021-03-11 00:28:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-11 00:28:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:53,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:53,788 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:54,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:54,003 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:54,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:54,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-03-11 00:28:54,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:54,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108432138] [2021-03-11 00:28:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:54,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108432138] [2021-03-11 00:28:54,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533112076] [2021-03-11 00:28:54,040 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) [2021-03-11 00:28:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:28:54,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:54,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:54,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:28:54,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418393046] [2021-03-11 00:28:54,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:28:54,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:28:54,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:28:54,125 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) [2021-03-11 00:28:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:54,255 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-11 00:28:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:28:54,256 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 [2021-03-11 00:28:54,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:54,259 INFO L225 Difference]: With dead ends: 669 [2021-03-11 00:28:54,259 INFO L226 Difference]: Without dead ends: 663 [2021-03-11 00:28:54,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-11 00:28:54,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-11 00:28:54,272 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) [2021-03-11 00:28:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-11 00:28:54,274 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-11 00:28:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:54,275 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-11 00:28:54,275 INFO L481 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) [2021-03-11 00:28:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-11 00:28:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:54,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:54,276 INFO L519 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] [2021-03-11 00:28:54,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-11 00:28:54,491 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-03-11 00:28:54,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:54,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929733003] [2021-03-11 00:28:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:54,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929733003] [2021-03-11 00:28:54,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596099021] [2021-03-11 00:28:54,546 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 [2021-03-11 00:28:54,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:54,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:54,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:54,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:28:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984354060] [2021-03-11 00:28:54,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:54,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:54,674 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) [2021-03-11 00:28:54,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:54,846 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-11 00:28:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:28:54,850 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 [2021-03-11 00:28:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:54,853 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:28:54,853 INFO L226 Difference]: Without dead ends: 672 [2021-03-11 00:28:54,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:28:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-11 00:28:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-11 00:28:54,866 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) [2021-03-11 00:28:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-11 00:28:54,868 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-11 00:28:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:54,868 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-11 00:28:54,868 INFO L481 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) [2021-03-11 00:28:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-11 00:28:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:54,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:54,870 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:28:55,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-11 00:28:55,088 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-03-11 00:28:55,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:55,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746095695] [2021-03-11 00:28:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:55,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746095695] [2021-03-11 00:28:55,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865328220] [2021-03-11 00:28:55,120 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) [2021-03-11 00:28:55,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:28:55,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:28:55,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:55,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:28:55,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515636444] [2021-03-11 00:28:55,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:28:55,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:55,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:28:55,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:28:55,210 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) [2021-03-11 00:28:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:55,309 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-11 00:28:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:28:55,310 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 [2021-03-11 00:28:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:55,315 INFO L225 Difference]: With dead ends: 830 [2021-03-11 00:28:55,316 INFO L226 Difference]: Without dead ends: 830 [2021-03-11 00:28:55,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-11 00:28:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-11 00:28:55,334 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) [2021-03-11 00:28:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-11 00:28:55,337 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-11 00:28:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:55,337 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-11 00:28:55,337 INFO L481 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) [2021-03-11 00:28:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-11 00:28:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:55,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:55,339 INFO L519 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] [2021-03-11 00:28:55,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-11 00:28:55,556 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-03-11 00:28:55,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:55,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840696996] [2021-03-11 00:28:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:55,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840696996] [2021-03-11 00:28:55,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047105946] [2021-03-11 00:28:55,596 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 [2021-03-11 00:28:55,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:28:55,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:55,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:55,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:28:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68851625] [2021-03-11 00:28:55,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:28:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:28:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:28:55,688 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) [2021-03-11 00:28:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:55,937 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-11 00:28:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:28:55,938 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 [2021-03-11 00:28:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:55,942 INFO L225 Difference]: With dead ends: 1196 [2021-03-11 00:28:55,942 INFO L226 Difference]: Without dead ends: 1196 [2021-03-11 00:28:55,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:28:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-11 00:28:55,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-11 00:28:55,955 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) [2021-03-11 00:28:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-11 00:28:55,957 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-11 00:28:55,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:55,957 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-11 00:28:55,957 INFO L481 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) [2021-03-11 00:28:55,957 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-11 00:28:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:55,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:55,958 INFO L519 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] [2021-03-11 00:28:56,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-11 00:28:56,171 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-03-11 00:28:56,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:56,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074270732] [2021-03-11 00:28:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:56,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074270732] [2021-03-11 00:28:56,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610007793] [2021-03-11 00:28:56,203 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) [2021-03-11 00:28:56,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:28:56,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:56,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:56,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:56,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:28:56,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845689253] [2021-03-11 00:28:56,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:28:56,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:28:56,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:28:56,294 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) [2021-03-11 00:28:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:56,642 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-11 00:28:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:28:56,643 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 [2021-03-11 00:28:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:56,648 INFO L225 Difference]: With dead ends: 1492 [2021-03-11 00:28:56,648 INFO L226 Difference]: Without dead ends: 1492 [2021-03-11 00:28:56,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:28:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-11 00:28:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-11 00:28:56,662 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) [2021-03-11 00:28:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-11 00:28:56,663 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-11 00:28:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:56,663 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-11 00:28:56,663 INFO L481 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) [2021-03-11 00:28:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-11 00:28:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:56,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:56,664 INFO L519 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] [2021-03-11 00:28:56,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-11 00:28:56,879 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:56,880 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-03-11 00:28:56,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:56,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598829709] [2021-03-11 00:28:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:56,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598829709] [2021-03-11 00:28:56,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073634804] [2021-03-11 00:28:56,921 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) [2021-03-11 00:28:56,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:56,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:56,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:57,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:57,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:28:57,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840742647] [2021-03-11 00:28:57,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:57,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:57,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:57,042 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) [2021-03-11 00:28:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:57,286 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-11 00:28:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:28:57,287 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 [2021-03-11 00:28:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:57,293 INFO L225 Difference]: With dead ends: 1258 [2021-03-11 00:28:57,293 INFO L226 Difference]: Without dead ends: 1248 [2021-03-11 00:28:57,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:28:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-11 00:28:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-11 00:28:57,315 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) [2021-03-11 00:28:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-11 00:28:57,318 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-11 00:28:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:57,319 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-11 00:28:57,319 INFO L481 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) [2021-03-11 00:28:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-11 00:28:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:57,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:57,321 INFO L519 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] [2021-03-11 00:28:57,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:57,538 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-03-11 00:28:57,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:57,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036616826] [2021-03-11 00:28:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:57,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036616826] [2021-03-11 00:28:57,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864855575] [2021-03-11 00:28:57,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:57,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:28:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:57,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:57,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:57,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:28:57,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371326331] [2021-03-11 00:28:57,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:57,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:57,686 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) [2021-03-11 00:28:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:57,961 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-11 00:28:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:28:57,962 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 [2021-03-11 00:28:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:57,967 INFO L225 Difference]: With dead ends: 1329 [2021-03-11 00:28:57,967 INFO L226 Difference]: Without dead ends: 1329 [2021-03-11 00:28:57,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:28:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-11 00:28:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-11 00:28:57,987 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) [2021-03-11 00:28:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-11 00:28:57,990 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-11 00:28:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:57,990 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-11 00:28:57,990 INFO L481 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) [2021-03-11 00:28:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-11 00:28:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:57,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:57,992 INFO L519 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] [2021-03-11 00:28:58,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:58,204 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:58,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-03-11 00:28:58,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:58,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406255476] [2021-03-11 00:28:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406255476] [2021-03-11 00:28:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73172728] [2021-03-11 00:28:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:58,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:58,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:58,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:28:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091688226] [2021-03-11 00:28:58,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:28:58,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:28:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:28:58,333 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) [2021-03-11 00:28:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:58,666 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-11 00:28:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:28:58,667 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 [2021-03-11 00:28:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:58,673 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:28:58,673 INFO L226 Difference]: Without dead ends: 1544 [2021-03-11 00:28:58,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:28:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-11 00:28:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-11 00:28:58,694 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) [2021-03-11 00:28:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-11 00:28:58,697 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-11 00:28:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:58,697 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-11 00:28:58,697 INFO L481 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) [2021-03-11 00:28:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-11 00:28:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:58,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:58,699 INFO L519 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] [2021-03-11 00:28:58,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-11 00:28:58,912 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:28:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:28:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-03-11 00:28:58,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:28:58,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59160553] [2021-03-11 00:28:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:28:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:28:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:58,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59160553] [2021-03-11 00:28:58,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459659243] [2021-03-11 00:28:58,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:28:58,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:28:58,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:28:58,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:28:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:28:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:28:59,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:28:59,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:28:59,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103675633] [2021-03-11 00:28:59,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:28:59,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:28:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:28:59,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:28:59,056 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) [2021-03-11 00:28:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:28:59,758 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-11 00:28:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:28:59,758 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 [2021-03-11 00:28:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:28:59,777 INFO L225 Difference]: With dead ends: 2734 [2021-03-11 00:28:59,777 INFO L226 Difference]: Without dead ends: 2734 [2021-03-11 00:28:59,778 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:28:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-11 00:28:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-11 00:28:59,815 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) [2021-03-11 00:28:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-11 00:28:59,818 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-11 00:28:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:28:59,818 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-11 00:28:59,818 INFO L481 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) [2021-03-11 00:28:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-11 00:28:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:28:59,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:28:59,820 INFO L519 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] [2021-03-11 00:29:00,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:00,038 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-03-11 00:29:00,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:00,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578005044] [2021-03-11 00:29:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:00,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578005044] [2021-03-11 00:29:00,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995382999] [2021-03-11 00:29:00,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:00,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:00,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:00,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:00,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:00,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:00,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:00,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127539602] [2021-03-11 00:29:00,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:00,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:00,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:00,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:00,212 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) [2021-03-11 00:29:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:00,895 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-11 00:29:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:29:00,895 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 [2021-03-11 00:29:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:00,901 INFO L225 Difference]: With dead ends: 2693 [2021-03-11 00:29:00,901 INFO L226 Difference]: Without dead ends: 2693 [2021-03-11 00:29:00,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 405.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:29:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-11 00:29:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-11 00:29:00,925 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) [2021-03-11 00:29:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-11 00:29:00,927 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-11 00:29:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:00,927 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-11 00:29:00,927 INFO L481 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) [2021-03-11 00:29:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-11 00:29:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:00,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:00,929 INFO L519 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] [2021-03-11 00:29:01,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-11 00:29:01,133 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:01,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:01,134 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-03-11 00:29:01,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:01,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348897560] [2021-03-11 00:29:01,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:01,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348897560] [2021-03-11 00:29:01,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246802190] [2021-03-11 00:29:01,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:01,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:01,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:01,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:29:01,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387385386] [2021-03-11 00:29:01,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:01,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:01,269 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) [2021-03-11 00:29:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:01,813 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-11 00:29:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:29:01,814 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 [2021-03-11 00:29:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:01,818 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:29:01,818 INFO L226 Difference]: Without dead ends: 2677 [2021-03-11 00:29:01,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:29:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-11 00:29:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-11 00:29:01,840 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) [2021-03-11 00:29:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-11 00:29:01,842 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-11 00:29:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:01,842 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-11 00:29:01,842 INFO L481 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) [2021-03-11 00:29:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-11 00:29:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:01,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:01,844 INFO L519 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] [2021-03-11 00:29:02,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-11 00:29:02,059 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-03-11 00:29:02,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:02,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25817888] [2021-03-11 00:29:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:02,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25817888] [2021-03-11 00:29:02,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267207907] [2021-03-11 00:29:02,113 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) [2021-03-11 00:29:02,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:29:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:02,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:02,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:29:02,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098617775] [2021-03-11 00:29:02,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:02,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:02,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:02,224 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) [2021-03-11 00:29:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:02,763 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-11 00:29:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:29:02,763 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 [2021-03-11 00:29:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:02,768 INFO L225 Difference]: With dead ends: 2474 [2021-03-11 00:29:02,768 INFO L226 Difference]: Without dead ends: 2470 [2021-03-11 00:29:02,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:29:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-11 00:29:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-11 00:29:02,792 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) [2021-03-11 00:29:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-11 00:29:02,793 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-11 00:29:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:02,794 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-11 00:29:02,794 INFO L481 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) [2021-03-11 00:29:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-11 00:29:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:02,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:02,795 INFO L519 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] [2021-03-11 00:29:03,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-11 00:29:03,012 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-03-11 00:29:03,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:03,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718558018] [2021-03-11 00:29:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:03,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718558018] [2021-03-11 00:29:03,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923324429] [2021-03-11 00:29:03,045 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) [2021-03-11 00:29:03,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:29:03,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:03,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:03,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:03,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:03,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514910901] [2021-03-11 00:29:03,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:03,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:03,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:03,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:03,150 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) [2021-03-11 00:29:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:03,742 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-11 00:29:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:29:03,742 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 [2021-03-11 00:29:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:03,746 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:29:03,747 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:29:03,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:29:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:29:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-11 00:29:03,768 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) [2021-03-11 00:29:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-11 00:29:03,770 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-11 00:29:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:03,770 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-11 00:29:03,770 INFO L481 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) [2021-03-11 00:29:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-11 00:29:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:03,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:03,772 INFO L519 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] [2021-03-11 00:29:03,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-11 00:29:03,987 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-03-11 00:29:03,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:03,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396979985] [2021-03-11 00:29:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:04,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396979985] [2021-03-11 00:29:04,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895915137] [2021-03-11 00:29:04,028 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) [2021-03-11 00:29:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:04,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:04,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:04,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:04,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036186303] [2021-03-11 00:29:04,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:04,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:04,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:04,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:04,126 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) [2021-03-11 00:29:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:04,791 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-11 00:29:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:29:04,792 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 [2021-03-11 00:29:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:04,796 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:29:04,796 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:29:04,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:29:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:29:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-11 00:29:04,818 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) [2021-03-11 00:29:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-11 00:29:04,820 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-11 00:29:04,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:04,820 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-11 00:29:04,820 INFO L481 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) [2021-03-11 00:29:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-11 00:29:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:04,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:04,822 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:29:05,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-11 00:29:05,039 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-03-11 00:29:05,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:05,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508426734] [2021-03-11 00:29:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:05,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508426734] [2021-03-11 00:29:05,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189103714] [2021-03-11 00:29:05,066 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 [2021-03-11 00:29:05,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:29:05,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:05,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:29:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:05,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:05,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:29:05,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888386701] [2021-03-11 00:29:05,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:29:05,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:29:05,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:29:05,138 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) [2021-03-11 00:29:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:05,206 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-11 00:29:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:29:05,207 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 [2021-03-11 00:29:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:05,209 INFO L225 Difference]: With dead ends: 929 [2021-03-11 00:29:05,209 INFO L226 Difference]: Without dead ends: 929 [2021-03-11 00:29:05,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-11 00:29:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-11 00:29:05,218 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) [2021-03-11 00:29:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-11 00:29:05,220 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-11 00:29:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:05,220 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-11 00:29:05,220 INFO L481 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) [2021-03-11 00:29:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-11 00:29:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:05,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:05,222 INFO L519 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] [2021-03-11 00:29:05,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:05,436 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-03-11 00:29:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:05,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937136513] [2021-03-11 00:29:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:05,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937136513] [2021-03-11 00:29:05,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879165441] [2021-03-11 00:29:05,466 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 [2021-03-11 00:29:05,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:05,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:05,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:05,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:29:05,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295431807] [2021-03-11 00:29:05,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:29:05,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:05,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:29:05,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:29:05,547 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) [2021-03-11 00:29:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:05,851 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-11 00:29:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:29:05,852 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 [2021-03-11 00:29:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:05,856 INFO L225 Difference]: With dead ends: 1555 [2021-03-11 00:29:05,856 INFO L226 Difference]: Without dead ends: 1555 [2021-03-11 00:29:05,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:29:05,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-11 00:29:05,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-11 00:29:05,876 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) [2021-03-11 00:29:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-11 00:29:05,879 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-11 00:29:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:05,879 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-11 00:29:05,879 INFO L481 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) [2021-03-11 00:29:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-11 00:29:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:05,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:05,881 INFO L519 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] [2021-03-11 00:29:06,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:29:06,095 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:06,096 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-03-11 00:29:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:06,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879280674] [2021-03-11 00:29:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:06,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879280674] [2021-03-11 00:29:06,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392982590] [2021-03-11 00:29:06,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:06,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:06,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:06,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:06,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:29:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727606199] [2021-03-11 00:29:06,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:29:06,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:06,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:29:06,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:29:06,229 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) [2021-03-11 00:29:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:06,479 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-11 00:29:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:29:06,480 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 [2021-03-11 00:29:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:06,494 INFO L225 Difference]: With dead ends: 1605 [2021-03-11 00:29:06,494 INFO L226 Difference]: Without dead ends: 1605 [2021-03-11 00:29:06,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:29:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-11 00:29:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-11 00:29:06,513 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) [2021-03-11 00:29:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-11 00:29:06,517 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-11 00:29:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:06,517 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-11 00:29:06,517 INFO L481 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) [2021-03-11 00:29:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-11 00:29:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:06,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:06,519 INFO L519 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] [2021-03-11 00:29:06,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:06,737 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-03-11 00:29:06,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:06,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319323382] [2021-03-11 00:29:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:06,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319323382] [2021-03-11 00:29:06,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324926969] [2021-03-11 00:29:06,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:06,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:06,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:29:06,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:06,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:29:06,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097296644] [2021-03-11 00:29:06,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:29:06,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:06,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:29:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:29:06,862 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) [2021-03-11 00:29:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:07,053 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-11 00:29:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:29:07,054 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 [2021-03-11 00:29:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:07,057 INFO L225 Difference]: With dead ends: 1524 [2021-03-11 00:29:07,057 INFO L226 Difference]: Without dead ends: 1520 [2021-03-11 00:29:07,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:29:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-11 00:29:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-11 00:29:07,076 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) [2021-03-11 00:29:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-11 00:29:07,079 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-11 00:29:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:07,079 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-11 00:29:07,079 INFO L481 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) [2021-03-11 00:29:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-11 00:29:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:07,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:07,081 INFO L519 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] [2021-03-11 00:29:07,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-11 00:29:07,299 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:07,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-03-11 00:29:07,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:07,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672175758] [2021-03-11 00:29:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:07,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672175758] [2021-03-11 00:29:07,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058320509] [2021-03-11 00:29:07,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:07,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:07,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:07,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:07,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:29:07,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436781874] [2021-03-11 00:29:07,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:29:07,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:07,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:29:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:29:07,405 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) [2021-03-11 00:29:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:07,646 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-11 00:29:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:29:07,647 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 [2021-03-11 00:29:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:07,650 INFO L225 Difference]: With dead ends: 1508 [2021-03-11 00:29:07,650 INFO L226 Difference]: Without dead ends: 1496 [2021-03-11 00:29:07,651 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:29:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-11 00:29:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-11 00:29:07,675 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) [2021-03-11 00:29:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-11 00:29:07,678 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-11 00:29:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:07,678 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-11 00:29:07,678 INFO L481 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) [2021-03-11 00:29:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-11 00:29:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:07,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:07,680 INFO L519 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] [2021-03-11 00:29:07,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:07,887 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-03-11 00:29:07,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:07,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229644800] [2021-03-11 00:29:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:07,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229644800] [2021-03-11 00:29:07,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515801091] [2021-03-11 00:29:07,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:07,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:07,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:07,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:08,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:08,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:08,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553736269] [2021-03-11 00:29:08,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:08,038 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) [2021-03-11 00:29:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:08,465 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-11 00:29:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:29:08,465 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 [2021-03-11 00:29:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:08,469 INFO L225 Difference]: With dead ends: 2412 [2021-03-11 00:29:08,469 INFO L226 Difference]: Without dead ends: 2412 [2021-03-11 00:29:08,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:29:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-11 00:29:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-11 00:29:08,490 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) [2021-03-11 00:29:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-11 00:29:08,492 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-11 00:29:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:08,492 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-11 00:29:08,492 INFO L481 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) [2021-03-11 00:29:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-11 00:29:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:08,496 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:08,497 INFO L519 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] [2021-03-11 00:29:08,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-11 00:29:08,711 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:08,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-03-11 00:29:08,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:08,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243100181] [2021-03-11 00:29:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:08,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243100181] [2021-03-11 00:29:08,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480784089] [2021-03-11 00:29:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:08,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:08,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:08,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:08,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287038874] [2021-03-11 00:29:08,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:08,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:08,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:08,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:08,851 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) [2021-03-11 00:29:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:09,329 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-11 00:29:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:29:09,330 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 [2021-03-11 00:29:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:09,335 INFO L225 Difference]: With dead ends: 2335 [2021-03-11 00:29:09,336 INFO L226 Difference]: Without dead ends: 2335 [2021-03-11 00:29:09,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:29:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-11 00:29:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-11 00:29:09,361 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) [2021-03-11 00:29:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:29:09,364 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:29:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:09,365 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:29:09,365 INFO L481 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) [2021-03-11 00:29:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:29:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:09,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:09,367 INFO L519 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] [2021-03-11 00:29:09,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:09,583 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-03-11 00:29:09,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:09,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99218593] [2021-03-11 00:29:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:09,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99218593] [2021-03-11 00:29:09,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622681990] [2021-03-11 00:29:09,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:09,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:09,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:09,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:09,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:09,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:29:09,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946811039] [2021-03-11 00:29:09,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:09,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:09,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:09,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:09,723 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) [2021-03-11 00:29:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:10,145 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-11 00:29:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:29:10,145 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 [2021-03-11 00:29:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:10,150 INFO L225 Difference]: With dead ends: 2285 [2021-03-11 00:29:10,150 INFO L226 Difference]: Without dead ends: 2285 [2021-03-11 00:29:10,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:29:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-11 00:29:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-11 00:29:10,173 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) [2021-03-11 00:29:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:29:10,176 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:29:10,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:10,176 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:29:10,176 INFO L481 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) [2021-03-11 00:29:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:29:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:10,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:10,178 INFO L519 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] [2021-03-11 00:29:10,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-11 00:29:10,395 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-03-11 00:29:10,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:10,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838662662] [2021-03-11 00:29:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:10,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838662662] [2021-03-11 00:29:10,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81637825] [2021-03-11 00:29:10,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:10,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:10,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:10,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:10,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:10,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:29:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187358624] [2021-03-11 00:29:10,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:10,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:10,530 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) [2021-03-11 00:29:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:10,889 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-11 00:29:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:29:10,889 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 [2021-03-11 00:29:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:10,894 INFO L225 Difference]: With dead ends: 2176 [2021-03-11 00:29:10,894 INFO L226 Difference]: Without dead ends: 2172 [2021-03-11 00:29:10,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:29:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-11 00:29:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-11 00:29:10,918 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) [2021-03-11 00:29:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:29:10,921 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:29:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:10,921 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:29:10,921 INFO L481 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) [2021-03-11 00:29:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:29:10,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:10,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:10,923 INFO L519 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] [2021-03-11 00:29:11,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:11,123 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-03-11 00:29:11,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:11,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441194868] [2021-03-11 00:29:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441194868] [2021-03-11 00:29:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704619836] [2021-03-11 00:29:11,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:11,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:11,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:11,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:11,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:11,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:11,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867305506] [2021-03-11 00:29:11,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:11,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:11,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:11,260 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) [2021-03-11 00:29:11,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:11,637 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-11 00:29:11,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:29:11,638 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 [2021-03-11 00:29:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:11,643 INFO L225 Difference]: With dead ends: 2199 [2021-03-11 00:29:11,644 INFO L226 Difference]: Without dead ends: 2199 [2021-03-11 00:29:11,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-11 00:29:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-11 00:29:11,668 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) [2021-03-11 00:29:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:29:11,672 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:29:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:11,672 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:29:11,672 INFO L481 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) [2021-03-11 00:29:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:29:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:11,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:11,674 INFO L519 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] [2021-03-11 00:29:11,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-11 00:29:11,887 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-03-11 00:29:11,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:11,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235091005] [2021-03-11 00:29:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:11,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235091005] [2021-03-11 00:29:11,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992641940] [2021-03-11 00:29:11,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:11,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:11,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:11,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:12,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:12,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:12,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368783616] [2021-03-11 00:29:12,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:12,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:12,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:12,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:12,042 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) [2021-03-11 00:29:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:12,377 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-11 00:29:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:29:12,378 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 [2021-03-11 00:29:12,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:12,381 INFO L225 Difference]: With dead ends: 2156 [2021-03-11 00:29:12,381 INFO L226 Difference]: Without dead ends: 2152 [2021-03-11 00:29:12,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:29:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-11 00:29:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-11 00:29:12,397 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) [2021-03-11 00:29:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:29:12,399 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:29:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:12,399 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:29:12,399 INFO L481 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) [2021-03-11 00:29:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:29:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:12,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:12,401 INFO L519 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] [2021-03-11 00:29:12,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-11 00:29:12,615 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:12,616 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-03-11 00:29:12,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:12,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939835667] [2021-03-11 00:29:12,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939835667] [2021-03-11 00:29:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933107273] [2021-03-11 00:29:12,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:12,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:12,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:12,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:12,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:12,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:12,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:29:12,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610174248] [2021-03-11 00:29:12,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:12,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:12,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:12,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:12,719 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) [2021-03-11 00:29:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:13,032 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-11 00:29:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:29:13,032 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 [2021-03-11 00:29:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:13,034 INFO L225 Difference]: With dead ends: 2097 [2021-03-11 00:29:13,034 INFO L226 Difference]: Without dead ends: 2097 [2021-03-11 00:29:13,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:29:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-11 00:29:13,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-11 00:29:13,058 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) [2021-03-11 00:29:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-11 00:29:13,060 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-11 00:29:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:13,060 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-11 00:29:13,060 INFO L481 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) [2021-03-11 00:29:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-11 00:29:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:13,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:13,062 INFO L519 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] [2021-03-11 00:29:13,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-11 00:29:13,267 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:13,268 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-03-11 00:29:13,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:13,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378520549] [2021-03-11 00:29:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:13,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378520549] [2021-03-11 00:29:13,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662382856] [2021-03-11 00:29:13,302 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 [2021-03-11 00:29:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:13,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:13,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:13,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:13,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:29:13,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209879855] [2021-03-11 00:29:13,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:13,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:13,392 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) [2021-03-11 00:29:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:13,682 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-11 00:29:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:29:13,683 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 [2021-03-11 00:29:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:13,686 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:29:13,687 INFO L226 Difference]: Without dead ends: 1959 [2021-03-11 00:29:13,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:29:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-11 00:29:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-11 00:29:13,711 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) [2021-03-11 00:29:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-11 00:29:13,714 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-11 00:29:13,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:13,714 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-11 00:29:13,714 INFO L481 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) [2021-03-11 00:29:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-11 00:29:13,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:13,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:13,717 INFO L519 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] [2021-03-11 00:29:13,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-11 00:29:13,935 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:13,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-03-11 00:29:13,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:13,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062706093] [2021-03-11 00:29:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062706093] [2021-03-11 00:29:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145680941] [2021-03-11 00:29:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:13,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:13,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:14,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:14,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:29:14,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560455636] [2021-03-11 00:29:14,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:29:14,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:29:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:29:14,048 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) [2021-03-11 00:29:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:14,266 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-11 00:29:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:29:14,267 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 [2021-03-11 00:29:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:14,271 INFO L225 Difference]: With dead ends: 1728 [2021-03-11 00:29:14,271 INFO L226 Difference]: Without dead ends: 1716 [2021-03-11 00:29:14,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:29:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-11 00:29:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-11 00:29:14,290 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) [2021-03-11 00:29:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-11 00:29:14,293 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-11 00:29:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:14,293 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-11 00:29:14,293 INFO L481 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) [2021-03-11 00:29:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-11 00:29:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:14,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:14,296 INFO L519 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] [2021-03-11 00:29:14,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:14,504 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-03-11 00:29:14,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:14,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616761617] [2021-03-11 00:29:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:14,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616761617] [2021-03-11 00:29:14,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271480501] [2021-03-11 00:29:14,539 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 [2021-03-11 00:29:14,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:14,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:14,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:14,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:14,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682064349] [2021-03-11 00:29:14,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:14,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:14,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:14,659 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) [2021-03-11 00:29:15,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:15,026 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-11 00:29:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:29:15,027 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 [2021-03-11 00:29:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:15,030 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:29:15,030 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:29:15,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:29:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:29:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-11 00:29:15,053 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) [2021-03-11 00:29:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-11 00:29:15,056 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-11 00:29:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:15,056 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-11 00:29:15,056 INFO L481 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) [2021-03-11 00:29:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-11 00:29:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:15,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:15,059 INFO L519 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] [2021-03-11 00:29:15,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-11 00:29:15,277 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-03-11 00:29:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:15,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417568586] [2021-03-11 00:29:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:15,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417568586] [2021-03-11 00:29:15,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087588709] [2021-03-11 00:29:15,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:15,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:15,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:15,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:15,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:29:15,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664267735] [2021-03-11 00:29:15,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:29:15,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:15,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:29:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:29:15,402 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) [2021-03-11 00:29:15,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:15,696 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-11 00:29:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:29:15,697 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 [2021-03-11 00:29:15,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:15,699 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:29:15,699 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:29:15,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:29:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:29:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-11 00:29:15,714 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) [2021-03-11 00:29:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-11 00:29:15,716 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-11 00:29:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:15,716 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-11 00:29:15,716 INFO L481 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) [2021-03-11 00:29:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-11 00:29:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:29:15,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:15,718 INFO L519 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] [2021-03-11 00:29:15,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-11 00:29:15,919 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-03-11 00:29:15,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:15,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731725773] [2021-03-11 00:29:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:15,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731725773] [2021-03-11 00:29:15,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988999247] [2021-03-11 00:29:15,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:29:15,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:29:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:16,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:16,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:29:16,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825307005] [2021-03-11 00:29:16,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:29:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:29:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:29:16,036 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) [2021-03-11 00:29:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:16,195 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-11 00:29:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:29:16,195 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 [2021-03-11 00:29:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:16,197 INFO L225 Difference]: With dead ends: 1649 [2021-03-11 00:29:16,197 INFO L226 Difference]: Without dead ends: 1637 [2021-03-11 00:29:16,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:29:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-11 00:29:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-11 00:29:16,211 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) [2021-03-11 00:29:16,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-11 00:29:16,213 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-11 00:29:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:16,213 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-11 00:29:16,213 INFO L481 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) [2021-03-11 00:29:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-11 00:29:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:16,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:16,215 INFO L519 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] [2021-03-11 00:29:16,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:16,430 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-03-11 00:29:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079160036] [2021-03-11 00:29:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:16,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079160036] [2021-03-11 00:29:16,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749473386] [2021-03-11 00:29:16,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:16,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:16,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:16,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:16,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:16,838 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 [2021-03-11 00:29:16,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:16,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:16,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:16,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:29:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:16,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:16,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:29:16,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138604005] [2021-03-11 00:29:16,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:29:16,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:16,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:29:16,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:29:16,864 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) [2021-03-11 00:29:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:17,454 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-03-11 00:29:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:29:17,455 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 [2021-03-11 00:29:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:17,458 INFO L225 Difference]: With dead ends: 1517 [2021-03-11 00:29:17,458 INFO L226 Difference]: Without dead ends: 1502 [2021-03-11 00:29:17,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:29:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-11 00:29:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-03-11 00:29:17,471 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) [2021-03-11 00:29:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-11 00:29:17,473 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-11 00:29:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:17,473 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-11 00:29:17,473 INFO L481 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) [2021-03-11 00:29:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-11 00:29:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:17,475 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:17,475 INFO L519 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] [2021-03-11 00:29:17,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-11 00:29:17,680 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:17,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-03-11 00:29:17,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:17,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088292402] [2021-03-11 00:29:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088292402] [2021-03-11 00:29:17,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880585909] [2021-03-11 00:29:17,885 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 [2021-03-11 00:29:17,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:17,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:29:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:18,129 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:29:18,129 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 [2021-03-11 00:29:18,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:18,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:18,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:18,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-03-11 00:29:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:18,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:18,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:29:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426414686] [2021-03-11 00:29:18,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:29:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:29:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:29:18,162 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:29:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:19,064 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-03-11 00:29:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:29:19,065 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:29:19,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:19,068 INFO L225 Difference]: With dead ends: 1495 [2021-03-11 00:29:19,068 INFO L226 Difference]: Without dead ends: 1480 [2021-03-11 00:29:19,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 845.2ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:29:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-03-11 00:29:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-03-11 00:29:19,086 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) [2021-03-11 00:29:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-03-11 00:29:19,089 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-03-11 00:29:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:19,089 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-03-11 00:29:19,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:29:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-03-11 00:29:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:19,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:19,092 INFO L519 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] [2021-03-11 00:29:19,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:19,311 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-03-11 00:29:19,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:19,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298627030] [2021-03-11 00:29:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:19,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298627030] [2021-03-11 00:29:19,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838859581] [2021-03-11 00:29:19,694 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 [2021-03-11 00:29:19,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:19,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:19,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:29:19,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:19,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:19,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:19,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-03-11 00:29:19,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:19,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:19,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:19,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:29:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:19,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:19,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:29:19,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031817479] [2021-03-11 00:29:19,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:29:19,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:19,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:29:19,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:19,904 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) [2021-03-11 00:29:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:21,966 INFO L93 Difference]: Finished difference Result 1658 states and 5345 transitions. [2021-03-11 00:29:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:29:21,967 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 [2021-03-11 00:29:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:21,970 INFO L225 Difference]: With dead ends: 1658 [2021-03-11 00:29:21,971 INFO L226 Difference]: Without dead ends: 1643 [2021-03-11 00:29:21,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1985.6ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:29:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-03-11 00:29:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-03-11 00:29:21,989 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) [2021-03-11 00:29:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-03-11 00:29:21,993 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-03-11 00:29:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:21,993 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-03-11 00:29:21,993 INFO L481 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) [2021-03-11 00:29:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-03-11 00:29:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:21,995 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:21,995 INFO L519 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] [2021-03-11 00:29:22,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-11 00:29:22,196 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-03-11 00:29:22,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:22,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699810906] [2021-03-11 00:29:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699810906] [2021-03-11 00:29:22,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943796869] [2021-03-11 00:29:22,445 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 [2021-03-11 00:29:22,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:22,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:22,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:22,667 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:29:22,668 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 [2021-03-11 00:29:22,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:22,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:22,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:22,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-03-11 00:29:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:22,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:22,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:29:22,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826064752] [2021-03-11 00:29:22,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:29:22,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:22,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:29:22,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:22,729 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 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) [2021-03-11 00:29:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:24,391 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-03-11 00:29:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:29:24,391 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 [2021-03-11 00:29:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:24,394 INFO L225 Difference]: With dead ends: 1843 [2021-03-11 00:29:24,394 INFO L226 Difference]: Without dead ends: 1828 [2021-03-11 00:29:24,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1363.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:29:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-03-11 00:29:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-03-11 00:29:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-03-11 00:29:24,411 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-03-11 00:29:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:24,411 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-03-11 00:29:24,411 INFO L481 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) [2021-03-11 00:29:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-03-11 00:29:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:24,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:24,413 INFO L519 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] [2021-03-11 00:29:24,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:24,613 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:24,614 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-03-11 00:29:24,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:24,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415952248] [2021-03-11 00:29:24,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:24,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415952248] [2021-03-11 00:29:24,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349647382] [2021-03-11 00:29:24,917 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 [2021-03-11 00:29:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:24,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:25,093 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 [2021-03-11 00:29:25,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:25,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:25,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:25,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:29:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:25,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:25,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:29:25,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876829868] [2021-03-11 00:29:25,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:29:25,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:25,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:29:25,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:29:25,119 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 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) [2021-03-11 00:29:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:27,292 INFO L93 Difference]: Finished difference Result 1877 states and 5988 transitions. [2021-03-11 00:29:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:29:27,293 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 [2021-03-11 00:29:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:27,296 INFO L225 Difference]: With dead ends: 1877 [2021-03-11 00:29:27,297 INFO L226 Difference]: Without dead ends: 1862 [2021-03-11 00:29:27,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1975.1ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:29:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-03-11 00:29:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1206. [2021-03-11 00:29:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:27,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-03-11 00:29:27,320 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-03-11 00:29:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:27,320 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-03-11 00:29:27,320 INFO L481 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) [2021-03-11 00:29:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-03-11 00:29:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:27,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:27,323 INFO L519 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] [2021-03-11 00:29:27,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:29:27,523 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:27,524 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-03-11 00:29:27,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:27,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044551294] [2021-03-11 00:29:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:27,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044551294] [2021-03-11 00:29:27,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294686869] [2021-03-11 00:29:27,822 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:29:27,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:28,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:28,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:28,081 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 [2021-03-11 00:29:28,096 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:29:28,121 INFO L628 ElimStorePlain]: treesize reduction 19, result has 57.8 percent of original size [2021-03-11 00:29:28,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:28,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-03-11 00:29:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:28,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:28,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:29:28,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851124751] [2021-03-11 00:29:28,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:29:28,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:28,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:29:28,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:29:28,205 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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) [2021-03-11 00:29:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:29,872 INFO L93 Difference]: Finished difference Result 2109 states and 6703 transitions. [2021-03-11 00:29:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:29:29,873 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 [2021-03-11 00:29:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:29,876 INFO L225 Difference]: With dead ends: 2109 [2021-03-11 00:29:29,876 INFO L226 Difference]: Without dead ends: 2094 [2021-03-11 00:29:29,877 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1524.2ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:29:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-03-11 00:29:29,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 1219. [2021-03-11 00:29:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-03-11 00:29:29,895 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-03-11 00:29:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:29,895 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-03-11 00:29:29,895 INFO L481 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) [2021-03-11 00:29:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-03-11 00:29:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:29,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:29,897 INFO L519 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] [2021-03-11 00:29:30,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-11 00:29:30,097 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:30,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-03-11 00:29:30,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:30,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716661092] [2021-03-11 00:29:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:30,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716661092] [2021-03-11 00:29:30,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468986856] [2021-03-11 00:29:30,303 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) [2021-03-11 00:29:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:30,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:30,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:30,529 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 [2021-03-11 00:29:30,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:30,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:30,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:30,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:29:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:30,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:30,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:29:30,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425347355] [2021-03-11 00:29:30,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:29:30,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:30,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:29:30,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:29:30,563 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 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) [2021-03-11 00:29:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:31,278 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-03-11 00:29:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:29:31,279 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 [2021-03-11 00:29:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:31,282 INFO L225 Difference]: With dead ends: 1622 [2021-03-11 00:29:31,283 INFO L226 Difference]: Without dead ends: 1607 [2021-03-11 00:29:31,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:29:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-03-11 00:29:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-03-11 00:29:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-03-11 00:29:31,307 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-03-11 00:29:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:31,308 INFO L480 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-03-11 00:29:31,308 INFO L481 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) [2021-03-11 00:29:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-03-11 00:29:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:31,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:31,310 INFO L519 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] [2021-03-11 00:29:31,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:29:31,528 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-03-11 00:29:31,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:31,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988288788] [2021-03-11 00:29:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988288788] [2021-03-11 00:29:31,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259596589] [2021-03-11 00:29:31,769 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 [2021-03-11 00:29:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:31,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:29:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:31,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-03-11 00:29:31,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:31,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:31,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:31,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:35 [2021-03-11 00:29:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:32,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:32,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:29:32,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564870014] [2021-03-11 00:29:32,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:29:32,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:32,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:29:32,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:29:32,130 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 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) [2021-03-11 00:29:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:33,951 INFO L93 Difference]: Finished difference Result 1847 states and 5891 transitions. [2021-03-11 00:29:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:29:33,951 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 [2021-03-11 00:29:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:33,955 INFO L225 Difference]: With dead ends: 1847 [2021-03-11 00:29:33,956 INFO L226 Difference]: Without dead ends: 1832 [2021-03-11 00:29:33,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1462.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:29:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-03-11 00:29:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1241. [2021-03-11 00:29:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-03-11 00:29:33,982 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-03-11 00:29:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:33,982 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-03-11 00:29:33,982 INFO L481 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) [2021-03-11 00:29:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-03-11 00:29:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:33,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:33,984 INFO L519 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] [2021-03-11 00:29:34,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:29:34,185 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-03-11 00:29:34,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:34,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346300118] [2021-03-11 00:29:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346300118] [2021-03-11 00:29:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365562954] [2021-03-11 00:29:34,391 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 [2021-03-11 00:29:34,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:34,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:34,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:34,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:29:34,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:34,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:34,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:34,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:29:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:34,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:34,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:29:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657833485] [2021-03-11 00:29:34,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:29:34,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:34,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:29:34,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:29:34,639 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 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) [2021-03-11 00:29:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:35,546 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-03-11 00:29:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:29:35,547 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 [2021-03-11 00:29:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:35,551 INFO L225 Difference]: With dead ends: 1876 [2021-03-11 00:29:35,551 INFO L226 Difference]: Without dead ends: 1861 [2021-03-11 00:29:35,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 810.5ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:29:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-03-11 00:29:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-03-11 00:29:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-03-11 00:29:35,576 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-03-11 00:29:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:35,577 INFO L480 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-03-11 00:29:35,577 INFO L481 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) [2021-03-11 00:29:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-03-11 00:29:35,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:35,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:35,579 INFO L519 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] [2021-03-11 00:29:35,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:35,780 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-03-11 00:29:35,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:35,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024173180] [2021-03-11 00:29:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024173180] [2021-03-11 00:29:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959802753] [2021-03-11 00:29:35,980 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 [2021-03-11 00:29:36,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:36,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:36,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:29:36,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:36,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:36,162 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 [2021-03-11 00:29:36,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:36,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:36,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:36,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:29:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:36,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:36,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:29:36,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433608820] [2021-03-11 00:29:36,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:29:36,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:29:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:29:36,190 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 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) [2021-03-11 00:29:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:36,572 INFO L93 Difference]: Finished difference Result 1393 states and 4580 transitions. [2021-03-11 00:29:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:29:36,573 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 [2021-03-11 00:29:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:36,575 INFO L225 Difference]: With dead ends: 1393 [2021-03-11 00:29:36,575 INFO L226 Difference]: Without dead ends: 1378 [2021-03-11 00:29:36,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:29:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-03-11 00:29:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1246. [2021-03-11 00:29:36,587 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) [2021-03-11 00:29:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-03-11 00:29:36,589 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-03-11 00:29:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:36,589 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-03-11 00:29:36,589 INFO L481 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) [2021-03-11 00:29:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-03-11 00:29:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:36,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:36,591 INFO L519 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] [2021-03-11 00:29:36,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:36,792 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:36,792 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-03-11 00:29:36,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:36,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653912146] [2021-03-11 00:29:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:36,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653912146] [2021-03-11 00:29:36,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782798688] [2021-03-11 00:29:36,958 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 [2021-03-11 00:29:36,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:36,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:29:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:37,172 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-03-11 00:29:37,172 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 76 treesize of output 59 [2021-03-11 00:29:37,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:37,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:37,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:37,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:84, output treesize:21 [2021-03-11 00:29:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:37,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:37,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:29:37,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720654451] [2021-03-11 00:29:37,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:29:37,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:37,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:29:37,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:29:37,250 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 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) [2021-03-11 00:29:38,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:38,946 INFO L93 Difference]: Finished difference Result 2076 states and 6735 transitions. [2021-03-11 00:29:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:29:38,947 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 [2021-03-11 00:29:38,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:38,950 INFO L225 Difference]: With dead ends: 2076 [2021-03-11 00:29:38,951 INFO L226 Difference]: Without dead ends: 2061 [2021-03-11 00:29:38,951 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1264.8ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:29:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-03-11 00:29:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1246. [2021-03-11 00:29:38,969 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) [2021-03-11 00:29:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-03-11 00:29:38,972 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-03-11 00:29:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:38,972 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-03-11 00:29:38,972 INFO L481 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) [2021-03-11 00:29:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-03-11 00:29:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:38,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:38,974 INFO L519 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] [2021-03-11 00:29:39,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-11 00:29:39,174 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:39,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-03-11 00:29:39,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060735906] [2021-03-11 00:29:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060735906] [2021-03-11 00:29:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694697890] [2021-03-11 00:29:39,369 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 [2021-03-11 00:29:39,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:29:39,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:29:39,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:39,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:39,531 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 [2021-03-11 00:29:39,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:29:39,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:39,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:39,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:29:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:39,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:39,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:29:39,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513428932] [2021-03-11 00:29:39,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:29:39,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:39,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:29:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:39,585 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 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) [2021-03-11 00:29:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:41,209 INFO L93 Difference]: Finished difference Result 1890 states and 6145 transitions. [2021-03-11 00:29:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:29:41,210 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 [2021-03-11 00:29:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:41,213 INFO L225 Difference]: With dead ends: 1890 [2021-03-11 00:29:41,213 INFO L226 Difference]: Without dead ends: 1875 [2021-03-11 00:29:41,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1381.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:29:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-03-11 00:29:41,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1246. [2021-03-11 00:29:41,229 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) [2021-03-11 00:29:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-03-11 00:29:41,231 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-03-11 00:29:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:41,231 INFO L480 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-03-11 00:29:41,231 INFO L481 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) [2021-03-11 00:29:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-03-11 00:29:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:41,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:41,234 INFO L519 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] [2021-03-11 00:29:41,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:29:41,434 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:41,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-03-11 00:29:41,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:41,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249130435] [2021-03-11 00:29:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:41,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249130435] [2021-03-11 00:29:41,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579582230] [2021-03-11 00:29:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:41,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:41,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:41,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:41,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:41,816 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 [2021-03-11 00:29:41,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:41,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:41,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:41,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:29:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:41,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:41,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:29:41,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044169159] [2021-03-11 00:29:41,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:29:41,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:41,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:29:41,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:41,847 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) [2021-03-11 00:29:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:44,194 INFO L93 Difference]: Finished difference Result 2938 states and 9138 transitions. [2021-03-11 00:29:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:29:44,195 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 [2021-03-11 00:29:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:44,201 INFO L225 Difference]: With dead ends: 2938 [2021-03-11 00:29:44,201 INFO L226 Difference]: Without dead ends: 2893 [2021-03-11 00:29:44,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2016.8ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:29:44,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-03-11 00:29:44,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-03-11 00:29:44,229 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) [2021-03-11 00:29:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-03-11 00:29:44,232 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-03-11 00:29:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:44,233 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-03-11 00:29:44,233 INFO L481 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) [2021-03-11 00:29:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-03-11 00:29:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:44,235 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:44,235 INFO L519 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] [2021-03-11 00:29:44,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:44,451 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:44,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-03-11 00:29:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:44,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325424754] [2021-03-11 00:29:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:44,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325424754] [2021-03-11 00:29:44,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298807023] [2021-03-11 00:29:44,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:44,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:29:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:44,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:44,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:44,829 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 [2021-03-11 00:29:44,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:44,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:44,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:44,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:29:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:44,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:44,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:29:44,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599422659] [2021-03-11 00:29:44,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:29:44,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:44,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:29:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:44,860 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 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) [2021-03-11 00:29:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:46,915 INFO L93 Difference]: Finished difference Result 2772 states and 8760 transitions. [2021-03-11 00:29:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:29:46,916 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 [2021-03-11 00:29:46,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:46,922 INFO L225 Difference]: With dead ends: 2772 [2021-03-11 00:29:46,922 INFO L226 Difference]: Without dead ends: 2727 [2021-03-11 00:29:46,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1718.7ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:29:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-03-11 00:29:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 1288. [2021-03-11 00:29:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-03-11 00:29:46,954 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-03-11 00:29:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:46,954 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-03-11 00:29:46,954 INFO L481 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) [2021-03-11 00:29:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-03-11 00:29:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:46,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:46,956 INFO L519 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] [2021-03-11 00:29:47,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:47,157 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:47,157 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-03-11 00:29:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:47,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516152281] [2021-03-11 00:29:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:47,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516152281] [2021-03-11 00:29:47,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941311148] [2021-03-11 00:29:47,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:47,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:47,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:47,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:47,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:47,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:47,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:29:47,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:29:47,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:47,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:47,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:29:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:47,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:47,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:29:47,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567837576] [2021-03-11 00:29:47,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:29:47,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:47,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:29:47,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:47,601 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 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) [2021-03-11 00:29:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:50,401 INFO L93 Difference]: Finished difference Result 3091 states and 9690 transitions. [2021-03-11 00:29:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:29:50,402 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 [2021-03-11 00:29:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:50,408 INFO L225 Difference]: With dead ends: 3091 [2021-03-11 00:29:50,408 INFO L226 Difference]: Without dead ends: 3046 [2021-03-11 00:29:50,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2278.2ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:29:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-03-11 00:29:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1292. [2021-03-11 00:29:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-03-11 00:29:50,434 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-03-11 00:29:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:50,434 INFO L480 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-03-11 00:29:50,434 INFO L481 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) [2021-03-11 00:29:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-03-11 00:29:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:50,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:50,436 INFO L519 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] [2021-03-11 00:29:50,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:29:50,641 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 13 times [2021-03-11 00:29:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:50,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999662576] [2021-03-11 00:29:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:50,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999662576] [2021-03-11 00:29:50,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504176063] [2021-03-11 00:29:50,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:29:50,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:51,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:51,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:51,031 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 [2021-03-11 00:29:51,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:51,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:51,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:51,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:29:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:51,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:51,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:29:51,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759501358] [2021-03-11 00:29:51,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:29:51,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:51,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:29:51,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:29:51,053 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 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) [2021-03-11 00:29:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:51,506 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-03-11 00:29:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:29:51,506 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 [2021-03-11 00:29:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:51,509 INFO L225 Difference]: With dead ends: 1654 [2021-03-11 00:29:51,509 INFO L226 Difference]: Without dead ends: 1639 [2021-03-11 00:29:51,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:29:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-03-11 00:29:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-03-11 00:29:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-03-11 00:29:51,525 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-03-11 00:29:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:51,525 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-03-11 00:29:51,525 INFO L481 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) [2021-03-11 00:29:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-03-11 00:29:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:51,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:51,527 INFO L519 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] [2021-03-11 00:29:51,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:29:51,727 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:51,728 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 14 times [2021-03-11 00:29:51,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:51,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729420089] [2021-03-11 00:29:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:51,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729420089] [2021-03-11 00:29:51,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928016300] [2021-03-11 00:29:51,970 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 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 [2021-03-11 00:29:51,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:29:51,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:51,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:29:51,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:52,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:52,208 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 [2021-03-11 00:29:52,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:52,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:52,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:52,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:91 [2021-03-11 00:29:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:52,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:52,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:29:52,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277134524] [2021-03-11 00:29:52,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:29:52,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:52,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:29:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:29:52,371 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 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) [2021-03-11 00:29:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:54,092 INFO L93 Difference]: Finished difference Result 1924 states and 6179 transitions. [2021-03-11 00:29:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:29:54,093 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 [2021-03-11 00:29:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:54,096 INFO L225 Difference]: With dead ends: 1924 [2021-03-11 00:29:54,096 INFO L226 Difference]: Without dead ends: 1894 [2021-03-11 00:29:54,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1507.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:29:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-03-11 00:29:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1297. [2021-03-11 00:29:54,114 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) [2021-03-11 00:29:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-03-11 00:29:54,116 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-03-11 00:29:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:54,116 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-03-11 00:29:54,117 INFO L481 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) [2021-03-11 00:29:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-03-11 00:29:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:54,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:54,118 INFO L519 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] [2021-03-11 00:29:54,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:54,331 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 15 times [2021-03-11 00:29:54,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:54,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44810048] [2021-03-11 00:29:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:54,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44810048] [2021-03-11 00:29:54,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24635157] [2021-03-11 00:29:54,518 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:54,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:29:54,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:54,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-11 00:29:54,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:29:54,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:54,710 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 [2021-03-11 00:29:54,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:54,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:54,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:54,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-03-11 00:29:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:54,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:54,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:29:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840723995] [2021-03-11 00:29:54,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:29:54,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:29:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:29:54,808 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 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) [2021-03-11 00:29:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:56,430 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-03-11 00:29:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:29:56,431 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 [2021-03-11 00:29:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:56,435 INFO L225 Difference]: With dead ends: 2000 [2021-03-11 00:29:56,435 INFO L226 Difference]: Without dead ends: 1985 [2021-03-11 00:29:56,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1235.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:29:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-03-11 00:29:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1306. [2021-03-11 00:29:56,457 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) [2021-03-11 00:29:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-03-11 00:29:56,460 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-03-11 00:29:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:56,460 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-03-11 00:29:56,460 INFO L481 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) [2021-03-11 00:29:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-03-11 00:29:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:56,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:56,462 INFO L519 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] [2021-03-11 00:29:56,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:56,667 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:56,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:56,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 16 times [2021-03-11 00:29:56,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:56,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386963840] [2021-03-11 00:29:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:56,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386963840] [2021-03-11 00:29:56,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986424726] [2021-03-11 00:29:56,938 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) [2021-03-11 00:29:56,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:29:56,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:56,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:29:56,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:57,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:29:57,139 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 [2021-03-11 00:29:57,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:29:57,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:57,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:57,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:29:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:57,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:57,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:29:57,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121670816] [2021-03-11 00:29:57,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:29:57,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:29:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:29:57,175 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) [2021-03-11 00:29:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:57,492 INFO L93 Difference]: Finished difference Result 1441 states and 4791 transitions. [2021-03-11 00:29:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:29:57,493 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 [2021-03-11 00:29:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:57,495 INFO L225 Difference]: With dead ends: 1441 [2021-03-11 00:29:57,495 INFO L226 Difference]: Without dead ends: 1426 [2021-03-11 00:29:57,495 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:29:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-03-11 00:29:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1309. [2021-03-11 00:29:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.3929663608562692) internal successors, (4438), 1308 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:29:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4438 transitions. [2021-03-11 00:29:57,512 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4438 transitions. Word has length 26 [2021-03-11 00:29:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:57,512 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 4438 transitions. [2021-03-11 00:29:57,512 INFO L481 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) [2021-03-11 00:29:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4438 transitions. [2021-03-11 00:29:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:57,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:57,514 INFO L519 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] [2021-03-11 00:29:57,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:57,730 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:29:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:29:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 17 times [2021-03-11 00:29:57,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:29:57,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211337364] [2021-03-11 00:29:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:29:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:29:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211337364] [2021-03-11 00:29:57,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391714879] [2021-03-11 00:29:57,926 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) [2021-03-11 00:29:57,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:29:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:29:57,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:29:57,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:29:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:29:58,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:58,117 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 [2021-03-11 00:29:58,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:29:58,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:29:58,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:29:58,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-03-11 00:29:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:29:58,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:29:58,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:29:58,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026988250] [2021-03-11 00:29:58,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:29:58,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:29:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:29:58,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:29:58,178 INFO L87 Difference]: Start difference. First operand 1309 states and 4438 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) [2021-03-11 00:29:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:29:59,768 INFO L93 Difference]: Finished difference Result 2201 states and 7163 transitions. [2021-03-11 00:29:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:29:59,769 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 [2021-03-11 00:29:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:29:59,773 INFO L225 Difference]: With dead ends: 2201 [2021-03-11 00:29:59,774 INFO L226 Difference]: Without dead ends: 2171 [2021-03-11 00:29:59,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1257.4ms TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:29:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-03-11 00:29:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1306. [2021-03-11 00:29:59,799 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) [2021-03-11 00:29:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-03-11 00:29:59,803 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-03-11 00:29:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:29:59,803 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-03-11 00:29:59,803 INFO L481 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) [2021-03-11 00:29:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-03-11 00:29:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:29:59,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:29:59,806 INFO L519 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] [2021-03-11 00:30:00,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-03-11 00:30:00,006 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:00,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 18 times [2021-03-11 00:30:00,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:00,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328387952] [2021-03-11 00:30:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328387952] [2021-03-11 00:30:00,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858453657] [2021-03-11 00:30:00,272 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 [2021-03-11 00:30:00,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:30:00,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:00,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:00,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:00,457 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 [2021-03-11 00:30:00,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:00,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:00,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:00,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:30:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:00,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:00,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:30:00,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981563715] [2021-03-11 00:30:00,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:00,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:00,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:00,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:00,512 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 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) [2021-03-11 00:30:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:02,018 INFO L93 Difference]: Finished difference Result 1909 states and 6282 transitions. [2021-03-11 00:30:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:30:02,018 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 [2021-03-11 00:30:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:02,023 INFO L225 Difference]: With dead ends: 1909 [2021-03-11 00:30:02,024 INFO L226 Difference]: Without dead ends: 1894 [2021-03-11 00:30:02,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1248.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:30:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-03-11 00:30:02,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1303. [2021-03-11 00:30:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.387864823348694) internal successors, (4411), 1302 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4411 transitions. [2021-03-11 00:30:02,063 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4411 transitions. Word has length 26 [2021-03-11 00:30:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:02,063 INFO L480 AbstractCegarLoop]: Abstraction has 1303 states and 4411 transitions. [2021-03-11 00:30:02,063 INFO L481 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) [2021-03-11 00:30:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4411 transitions. [2021-03-11 00:30:02,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:02,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:02,066 INFO L519 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] [2021-03-11 00:30:02,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:02,267 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:02,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 19 times [2021-03-11 00:30:02,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:02,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628296596] [2021-03-11 00:30:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:02,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628296596] [2021-03-11 00:30:02,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700398595] [2021-03-11 00:30:02,532 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 [2021-03-11 00:30:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:02,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:02,774 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 [2021-03-11 00:30:02,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:02,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:02,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:02,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:30:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:02,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:02,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:30:02,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104943860] [2021-03-11 00:30:02,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:30:02,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:02,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:30:02,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:30:02,804 INFO L87 Difference]: Start difference. First operand 1303 states and 4411 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) [2021-03-11 00:30:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:03,478 INFO L93 Difference]: Finished difference Result 1736 states and 5716 transitions. [2021-03-11 00:30:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:30:03,479 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 [2021-03-11 00:30:03,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:03,483 INFO L225 Difference]: With dead ends: 1736 [2021-03-11 00:30:03,483 INFO L226 Difference]: Without dead ends: 1715 [2021-03-11 00:30:03,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 698.7ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:30:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-03-11 00:30:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-03-11 00:30:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3827252419955323) internal successors, (4543), 1343 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4543 transitions. [2021-03-11 00:30:03,509 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4543 transitions. Word has length 26 [2021-03-11 00:30:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:03,509 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 4543 transitions. [2021-03-11 00:30:03,509 INFO L481 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) [2021-03-11 00:30:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4543 transitions. [2021-03-11 00:30:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:03,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:03,512 INFO L519 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] [2021-03-11 00:30:03,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-11 00:30:03,730 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:03,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 20 times [2021-03-11 00:30:03,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:03,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012172131] [2021-03-11 00:30:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:04,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012172131] [2021-03-11 00:30:04,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655805735] [2021-03-11 00:30:04,001 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 [2021-03-11 00:30:04,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-11 00:30:04,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:04,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:04,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-03-11 00:30:04,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:04,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:04,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:04,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:89 [2021-03-11 00:30:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:04,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:04,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-03-11 00:30:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357708598] [2021-03-11 00:30:04,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:30:04,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:30:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:30:04,348 INFO L87 Difference]: Start difference. First operand 1344 states and 4543 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) [2021-03-11 00:30:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:05,601 INFO L93 Difference]: Finished difference Result 1754 states and 5590 transitions. [2021-03-11 00:30:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:30:05,602 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 [2021-03-11 00:30:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:05,605 INFO L225 Difference]: With dead ends: 1754 [2021-03-11 00:30:05,605 INFO L226 Difference]: Without dead ends: 1729 [2021-03-11 00:30:05,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1166.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:30:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-03-11 00:30:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1358. [2021-03-11 00:30:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3920412675018423) internal successors, (4603), 1357 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4603 transitions. [2021-03-11 00:30:05,625 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4603 transitions. Word has length 26 [2021-03-11 00:30:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:05,626 INFO L480 AbstractCegarLoop]: Abstraction has 1358 states and 4603 transitions. [2021-03-11 00:30:05,626 INFO L481 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) [2021-03-11 00:30:05,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4603 transitions. [2021-03-11 00:30:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:05,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:05,628 INFO L519 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] [2021-03-11 00:30:05,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:05,828 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2016041692, now seen corresponding path program 21 times [2021-03-11 00:30:05,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:05,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311932258] [2021-03-11 00:30:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:06,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311932258] [2021-03-11 00:30:06,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929494118] [2021-03-11 00:30:06,097 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 [2021-03-11 00:30:06,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:30:06,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:30:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:06,334 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:30:06,334 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 [2021-03-11 00:30:06,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:06,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:06,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:06,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-03-11 00:30:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:06,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:06,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:30:06,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874745335] [2021-03-11 00:30:06,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:06,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:06,422 INFO L87 Difference]: Start difference. First operand 1358 states and 4603 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) [2021-03-11 00:30:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:07,486 INFO L93 Difference]: Finished difference Result 1743 states and 5751 transitions. [2021-03-11 00:30:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:30:07,487 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 [2021-03-11 00:30:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:07,491 INFO L225 Difference]: With dead ends: 1743 [2021-03-11 00:30:07,491 INFO L226 Difference]: Without dead ends: 1714 [2021-03-11 00:30:07,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1003.7ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:30:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-03-11 00:30:07,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1361. [2021-03-11 00:30:07,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.3926470588235293) internal successors, (4614), 1360 states have internal predecessors, (4614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4614 transitions. [2021-03-11 00:30:07,522 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4614 transitions. Word has length 26 [2021-03-11 00:30:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:07,522 INFO L480 AbstractCegarLoop]: Abstraction has 1361 states and 4614 transitions. [2021-03-11 00:30:07,522 INFO L481 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) [2021-03-11 00:30:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4614 transitions. [2021-03-11 00:30:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:07,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:07,525 INFO L519 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] [2021-03-11 00:30:07,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-11 00:30:07,725 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 22 times [2021-03-11 00:30:07,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:07,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445235188] [2021-03-11 00:30:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445235188] [2021-03-11 00:30:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243491828] [2021-03-11 00:30:08,046 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 [2021-03-11 00:30:08,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:30:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:08,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:30:08,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:08,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:08,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:08,252 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 [2021-03-11 00:30:08,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:08,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:08,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:08,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:30:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:08,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:08,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:30:08,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469359947] [2021-03-11 00:30:08,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:30:08,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:30:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:30:08,285 INFO L87 Difference]: Start difference. First operand 1361 states and 4614 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) [2021-03-11 00:30:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:08,719 INFO L93 Difference]: Finished difference Result 1474 states and 4920 transitions. [2021-03-11 00:30:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:30:08,719 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 [2021-03-11 00:30:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:08,722 INFO L225 Difference]: With dead ends: 1474 [2021-03-11 00:30:08,722 INFO L226 Difference]: Without dead ends: 1459 [2021-03-11 00:30:08,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:30:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-03-11 00:30:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1367. [2021-03-11 00:30:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.394582723279649) internal successors, (4637), 1366 states have internal predecessors, (4637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4637 transitions. [2021-03-11 00:30:08,745 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4637 transitions. Word has length 26 [2021-03-11 00:30:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:08,745 INFO L480 AbstractCegarLoop]: Abstraction has 1367 states and 4637 transitions. [2021-03-11 00:30:08,745 INFO L481 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) [2021-03-11 00:30:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4637 transitions. [2021-03-11 00:30:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:08,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:08,748 INFO L519 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] [2021-03-11 00:30:08,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:08,950 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 23 times [2021-03-11 00:30:08,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:08,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706943435] [2021-03-11 00:30:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:09,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706943435] [2021-03-11 00:30:09,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075671392] [2021-03-11 00:30:09,242 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) [2021-03-11 00:30:09,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:30:09,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:30:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:09,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:09,519 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 [2021-03-11 00:30:09,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:09,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:09,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:09,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-03-11 00:30:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:09,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:09,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:30:09,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165226280] [2021-03-11 00:30:09,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:30:09,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:30:09,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:30:09,596 INFO L87 Difference]: Start difference. First operand 1367 states and 4637 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) [2021-03-11 00:30:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:10,323 INFO L93 Difference]: Finished difference Result 1826 states and 6031 transitions. [2021-03-11 00:30:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:30:10,323 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 [2021-03-11 00:30:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:10,327 INFO L225 Difference]: With dead ends: 1826 [2021-03-11 00:30:10,327 INFO L226 Difference]: Without dead ends: 1801 [2021-03-11 00:30:10,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 854.6ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:30:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-03-11 00:30:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1374. [2021-03-11 00:30:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.3991260014566644) internal successors, (4667), 1373 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4667 transitions. [2021-03-11 00:30:10,352 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4667 transitions. Word has length 26 [2021-03-11 00:30:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:10,352 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 4667 transitions. [2021-03-11 00:30:10,352 INFO L481 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) [2021-03-11 00:30:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4667 transitions. [2021-03-11 00:30:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:10,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:10,355 INFO L519 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] [2021-03-11 00:30:10,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-11 00:30:10,568 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 24 times [2021-03-11 00:30:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:10,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284306970] [2021-03-11 00:30:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:10,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284306970] [2021-03-11 00:30:10,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600117832] [2021-03-11 00:30:10,786 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 [2021-03-11 00:30:10,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:30:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:10,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:10,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:30:10,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:10,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:10,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:10,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-11 00:30:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:11,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:11,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:30:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071862206] [2021-03-11 00:30:11,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:11,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:11,025 INFO L87 Difference]: Start difference. First operand 1374 states and 4667 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) [2021-03-11 00:30:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:11,810 INFO L93 Difference]: Finished difference Result 1851 states and 6138 transitions. [2021-03-11 00:30:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:30:11,810 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 [2021-03-11 00:30:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:11,813 INFO L225 Difference]: With dead ends: 1851 [2021-03-11 00:30:11,813 INFO L226 Difference]: Without dead ends: 1832 [2021-03-11 00:30:11,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:30:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-03-11 00:30:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1386. [2021-03-11 00:30:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:11,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-03-11 00:30:11,843 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-03-11 00:30:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:11,843 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-03-11 00:30:11,843 INFO L481 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) [2021-03-11 00:30:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-03-11 00:30:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:11,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:11,845 INFO L519 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] [2021-03-11 00:30:12,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-03-11 00:30:12,057 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:12,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 25 times [2021-03-11 00:30:12,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:12,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823355921] [2021-03-11 00:30:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:12,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823355921] [2021-03-11 00:30:12,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406067112] [2021-03-11 00:30:12,244 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 [2021-03-11 00:30:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:12,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:12,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:12,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:12,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:12,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-11 00:30:12,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:12,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:12,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:12,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-03-11 00:30:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:12,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:12,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:30:12,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828505502] [2021-03-11 00:30:12,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:30:12,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:12,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:30:12,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:30:12,472 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 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) [2021-03-11 00:30:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:13,079 INFO L93 Difference]: Finished difference Result 1888 states and 6257 transitions. [2021-03-11 00:30:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:30:13,080 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 [2021-03-11 00:30:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:13,084 INFO L225 Difference]: With dead ends: 1888 [2021-03-11 00:30:13,084 INFO L226 Difference]: Without dead ends: 1863 [2021-03-11 00:30:13,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:30:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-03-11 00:30:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1386. [2021-03-11 00:30:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.4021660649819494) internal successors, (4712), 1385 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4712 transitions. [2021-03-11 00:30:13,132 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4712 transitions. Word has length 26 [2021-03-11 00:30:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:13,132 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 4712 transitions. [2021-03-11 00:30:13,132 INFO L481 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) [2021-03-11 00:30:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4712 transitions. [2021-03-11 00:30:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:13,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:13,135 INFO L519 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] [2021-03-11 00:30:13,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-11 00:30:13,343 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:13,344 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-03-11 00:30:13,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:13,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349217995] [2021-03-11 00:30:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:13,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349217995] [2021-03-11 00:30:13,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389639186] [2021-03-11 00:30:13,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:13,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:30:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:30:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:13,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:13,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:13,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-03-11 00:30:13,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:13,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:13,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:13,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:30:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:13,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:13,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:30:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165320226] [2021-03-11 00:30:13,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:13,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:13,963 INFO L87 Difference]: Start difference. First operand 1386 states and 4712 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) [2021-03-11 00:30:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:15,328 INFO L93 Difference]: Finished difference Result 1823 states and 6011 transitions. [2021-03-11 00:30:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:30:15,329 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 [2021-03-11 00:30:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:15,333 INFO L225 Difference]: With dead ends: 1823 [2021-03-11 00:30:15,333 INFO L226 Difference]: Without dead ends: 1797 [2021-03-11 00:30:15,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1449.0ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:30:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-03-11 00:30:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1398. [2021-03-11 00:30:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-03-11 00:30:15,358 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-03-11 00:30:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:15,358 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-03-11 00:30:15,358 INFO L481 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) [2021-03-11 00:30:15,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-03-11 00:30:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:15,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:15,361 INFO L519 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] [2021-03-11 00:30:15,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:15,561 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-03-11 00:30:15,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:15,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374455558] [2021-03-11 00:30:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:15,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374455558] [2021-03-11 00:30:15,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680489188] [2021-03-11 00:30:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:30:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:15,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:15,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:16,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:16,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:16,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:16,115 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 [2021-03-11 00:30:16,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:16,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:16,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:16,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:30:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:16,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:30:16,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793831461] [2021-03-11 00:30:16,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:30:16,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:16,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:30:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:30:16,152 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 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) [2021-03-11 00:30:17,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:17,419 INFO L93 Difference]: Finished difference Result 1968 states and 6512 transitions. [2021-03-11 00:30:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:30:17,419 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 [2021-03-11 00:30:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:17,422 INFO L225 Difference]: With dead ends: 1968 [2021-03-11 00:30:17,422 INFO L226 Difference]: Without dead ends: 1953 [2021-03-11 00:30:17,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1267.9ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:30:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-03-11 00:30:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-03-11 00:30:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.397279885468862) internal successors, (4746), 1397 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4746 transitions. [2021-03-11 00:30:17,440 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4746 transitions. Word has length 26 [2021-03-11 00:30:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:17,440 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4746 transitions. [2021-03-11 00:30:17,440 INFO L481 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) [2021-03-11 00:30:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4746 transitions. [2021-03-11 00:30:17,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:17,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:17,442 INFO L519 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] [2021-03-11 00:30:17,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-11 00:30:17,642 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 26 times [2021-03-11 00:30:17,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:17,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782437315] [2021-03-11 00:30:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:17,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782437315] [2021-03-11 00:30:17,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700130407] [2021-03-11 00:30:17,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:17,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:17,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:18,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:18,051 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 [2021-03-11 00:30:18,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:18,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:18,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:18,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:30:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:18,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:18,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:30:18,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943593193] [2021-03-11 00:30:18,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:18,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:18,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:18,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:18,106 INFO L87 Difference]: Start difference. First operand 1398 states and 4746 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) [2021-03-11 00:30:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:19,437 INFO L93 Difference]: Finished difference Result 2014 states and 6565 transitions. [2021-03-11 00:30:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:30:19,438 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 [2021-03-11 00:30:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:19,442 INFO L225 Difference]: With dead ends: 2014 [2021-03-11 00:30:19,443 INFO L226 Difference]: Without dead ends: 1995 [2021-03-11 00:30:19,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1110.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:30:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-03-11 00:30:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1407. [2021-03-11 00:30:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 3.3975817923186344) internal successors, (4777), 1406 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4777 transitions. [2021-03-11 00:30:19,475 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4777 transitions. Word has length 26 [2021-03-11 00:30:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:19,475 INFO L480 AbstractCegarLoop]: Abstraction has 1407 states and 4777 transitions. [2021-03-11 00:30:19,475 INFO L481 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) [2021-03-11 00:30:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4777 transitions. [2021-03-11 00:30:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:19,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:19,478 INFO L519 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] [2021-03-11 00:30:19,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:19,687 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:19,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-03-11 00:30:19,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:19,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076059544] [2021-03-11 00:30:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:20,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076059544] [2021-03-11 00:30:20,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637168610] [2021-03-11 00:30:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:20,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:20,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:20,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:20,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:20,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:20,245 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 [2021-03-11 00:30:20,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:20,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:20,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:20,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:30:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:20,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:20,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:30:20,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722406247] [2021-03-11 00:30:20,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:30:20,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:20,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:30:20,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:30:20,275 INFO L87 Difference]: Start difference. First operand 1407 states and 4777 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) [2021-03-11 00:30:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:22,128 INFO L93 Difference]: Finished difference Result 2051 states and 6623 transitions. [2021-03-11 00:30:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:30:22,129 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 [2021-03-11 00:30:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:22,134 INFO L225 Difference]: With dead ends: 2051 [2021-03-11 00:30:22,134 INFO L226 Difference]: Without dead ends: 2029 [2021-03-11 00:30:22,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1692.7ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:30:22,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-03-11 00:30:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1414. [2021-03-11 00:30:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1413 states have (on average 3.3984430290162773) internal successors, (4802), 1413 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) [2021-03-11 00:30:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 4802 transitions. [2021-03-11 00:30:22,163 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 4802 transitions. Word has length 26 [2021-03-11 00:30:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:22,163 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 4802 transitions. [2021-03-11 00:30:22,163 INFO L481 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) [2021-03-11 00:30:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 4802 transitions. [2021-03-11 00:30:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:22,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:22,166 INFO L519 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] [2021-03-11 00:30:22,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-11 00:30:22,367 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-03-11 00:30:22,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:22,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62422984] [2021-03-11 00:30:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:22,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62422984] [2021-03-11 00:30:22,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043976295] [2021-03-11 00:30:22,650 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:22,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:30:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:30:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:22,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:22,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-03-11 00:30:23,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:23,322 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 67 [2021-03-11 00:30:23,322 INFO L628 ElimStorePlain]: treesize reduction 196, result has 42.5 percent of original size [2021-03-11 00:30:23,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:23,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:530 [2021-03-11 00:30:23,702 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-03-11 00:30:23,864 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-11 00:30:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:23,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:23,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-03-11 00:30:23,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528383221] [2021-03-11 00:30:23,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:30:23,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:23,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:30:23,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:30:23,899 INFO L87 Difference]: Start difference. First operand 1414 states and 4802 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) [2021-03-11 00:30:27,469 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-03-11 00:30:27,859 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-03-11 00:30:28,122 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-03-11 00:30:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:28,214 INFO L93 Difference]: Finished difference Result 2512 states and 8095 transitions. [2021-03-11 00:30:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:30:28,215 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 [2021-03-11 00:30:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:28,220 INFO L225 Difference]: With dead ends: 2512 [2021-03-11 00:30:28,221 INFO L226 Difference]: Without dead ends: 2497 [2021-03-11 00:30:28,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 3741.6ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:30:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-03-11 00:30:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1424. [2021-03-11 00:30:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.399156711173577) internal successors, (4837), 1423 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4837 transitions. [2021-03-11 00:30:28,251 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4837 transitions. Word has length 26 [2021-03-11 00:30:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:28,251 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 4837 transitions. [2021-03-11 00:30:28,252 INFO L481 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) [2021-03-11 00:30:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4837 transitions. [2021-03-11 00:30:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:28,254 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:28,254 INFO L519 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] [2021-03-11 00:30:28,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:28,455 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-03-11 00:30:28,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:28,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109102222] [2021-03-11 00:30:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:28,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109102222] [2021-03-11 00:30:28,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956137138] [2021-03-11 00:30:28,774 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:30:28,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:30:28,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:28,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:30:28,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:28,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:28,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:28,999 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 [2021-03-11 00:30:29,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:29,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:29,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:29,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:30:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:29,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:29,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:30:29,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3240271] [2021-03-11 00:30:29,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:29,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:29,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:29,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:29,037 INFO L87 Difference]: Start difference. First operand 1424 states and 4837 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) [2021-03-11 00:30:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:31,060 INFO L93 Difference]: Finished difference Result 3025 states and 9657 transitions. [2021-03-11 00:30:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:30:31,061 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 [2021-03-11 00:30:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:31,066 INFO L225 Difference]: With dead ends: 3025 [2021-03-11 00:30:31,066 INFO L226 Difference]: Without dead ends: 2989 [2021-03-11 00:30:31,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1770.9ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:30:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-03-11 00:30:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 1557. [2021-03-11 00:30:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.417095115681234) internal successors, (5317), 1556 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5317 transitions. [2021-03-11 00:30:31,093 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5317 transitions. Word has length 26 [2021-03-11 00:30:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:31,093 INFO L480 AbstractCegarLoop]: Abstraction has 1557 states and 5317 transitions. [2021-03-11 00:30:31,093 INFO L481 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) [2021-03-11 00:30:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5317 transitions. [2021-03-11 00:30:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:31,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:31,096 INFO L519 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] [2021-03-11 00:30:31,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-11 00:30:31,296 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-03-11 00:30:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:31,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195432954] [2021-03-11 00:30:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195432954] [2021-03-11 00:30:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286694872] [2021-03-11 00:30:31,562 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:31,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:30:31,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:31,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:31,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:31,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:31,731 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 [2021-03-11 00:30:31,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:31,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:31,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:31,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:30:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:31,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:31,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:30:31,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038489342] [2021-03-11 00:30:31,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:31,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:31,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:31,829 INFO L87 Difference]: Start difference. First operand 1557 states and 5317 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) [2021-03-11 00:30:32,637 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-03-11 00:30:32,801 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-11 00:30:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:34,970 INFO L93 Difference]: Finished difference Result 3407 states and 10755 transitions. [2021-03-11 00:30:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:30:34,971 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 [2021-03-11 00:30:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:34,979 INFO L225 Difference]: With dead ends: 3407 [2021-03-11 00:30:34,979 INFO L226 Difference]: Without dead ends: 3350 [2021-03-11 00:30:34,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2585.6ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:30:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2021-03-11 00:30:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 1580. [2021-03-11 00:30:35,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-03-11 00:30:35,021 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-03-11 00:30:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:35,022 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-03-11 00:30:35,022 INFO L481 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) [2021-03-11 00:30:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-03-11 00:30:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:35,025 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:35,025 INFO L519 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] [2021-03-11 00:30:35,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:35,226 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1512099618, now seen corresponding path program 27 times [2021-03-11 00:30:35,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:35,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359121451] [2021-03-11 00:30:35,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:35,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359121451] [2021-03-11 00:30:35,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49372101] [2021-03-11 00:30:35,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:35,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:30:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:30:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:35,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:35,777 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 [2021-03-11 00:30:35,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:35,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:35,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:30:35,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:182 [2021-03-11 00:30:36,043 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:30:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:36,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:36,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:30:36,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984851101] [2021-03-11 00:30:36,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:36,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:36,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:36,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:36,076 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 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) [2021-03-11 00:30:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:38,145 INFO L93 Difference]: Finished difference Result 2188 states and 7228 transitions. [2021-03-11 00:30:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:30:38,146 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 [2021-03-11 00:30:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:38,149 INFO L225 Difference]: With dead ends: 2188 [2021-03-11 00:30:38,149 INFO L226 Difference]: Without dead ends: 2158 [2021-03-11 00:30:38,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1932.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:30:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-03-11 00:30:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1591. [2021-03-11 00:30:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.419496855345912) internal successors, (5437), 1590 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5437 transitions. [2021-03-11 00:30:38,169 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5437 transitions. Word has length 26 [2021-03-11 00:30:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:38,169 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5437 transitions. [2021-03-11 00:30:38,169 INFO L481 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) [2021-03-11 00:30:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5437 transitions. [2021-03-11 00:30:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:38,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:38,171 INFO L519 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] [2021-03-11 00:30:38,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-11 00:30:38,371 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash -105433162, now seen corresponding path program 28 times [2021-03-11 00:30:38,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:38,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865541982] [2021-03-11 00:30:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:38,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865541982] [2021-03-11 00:30:38,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920126691] [2021-03-11 00:30:38,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:38,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:30:38,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:38,866 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:30:38,867 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 [2021-03-11 00:30:38,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:38,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:38,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:38,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:22 [2021-03-11 00:30:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:38,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:38,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:30:38,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102634336] [2021-03-11 00:30:38,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:38,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:38,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:38,943 INFO L87 Difference]: Start difference. First operand 1591 states and 5437 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) [2021-03-11 00:30:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:40,817 INFO L93 Difference]: Finished difference Result 2267 states and 7551 transitions. [2021-03-11 00:30:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:30:40,818 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 [2021-03-11 00:30:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:40,823 INFO L225 Difference]: With dead ends: 2267 [2021-03-11 00:30:40,823 INFO L226 Difference]: Without dead ends: 2248 [2021-03-11 00:30:40,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1493.5ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:30:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-03-11 00:30:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1594. [2021-03-11 00:30:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.418706842435656) internal successors, (5446), 1593 states have internal predecessors, (5446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5446 transitions. [2021-03-11 00:30:40,857 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5446 transitions. Word has length 26 [2021-03-11 00:30:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:40,857 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5446 transitions. [2021-03-11 00:30:40,857 INFO L481 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) [2021-03-11 00:30:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5446 transitions. [2021-03-11 00:30:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:40,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:40,860 INFO L519 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] [2021-03-11 00:30:41,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:41,061 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 29 times [2021-03-11 00:30:41,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:41,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417554659] [2021-03-11 00:30:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:41,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417554659] [2021-03-11 00:30:41,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123381448] [2021-03-11 00:30:41,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:41,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:30:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:30:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:41,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:41,483 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 [2021-03-11 00:30:41,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:41,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:41,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:41,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:30:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:41,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:41,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:30:41,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982263454] [2021-03-11 00:30:41,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:30:41,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:30:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:30:41,561 INFO L87 Difference]: Start difference. First operand 1594 states and 5446 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) [2021-03-11 00:30:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:43,008 INFO L93 Difference]: Finished difference Result 2170 states and 7222 transitions. [2021-03-11 00:30:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:30:43,009 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 [2021-03-11 00:30:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:43,012 INFO L225 Difference]: With dead ends: 2170 [2021-03-11 00:30:43,012 INFO L226 Difference]: Without dead ends: 2145 [2021-03-11 00:30:43,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1153.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:30:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-03-11 00:30:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1588. [2021-03-11 00:30:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.420289855072464) internal successors, (5428), 1587 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5428 transitions. [2021-03-11 00:30:43,037 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5428 transitions. Word has length 26 [2021-03-11 00:30:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:43,037 INFO L480 AbstractCegarLoop]: Abstraction has 1588 states and 5428 transitions. [2021-03-11 00:30:43,037 INFO L481 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) [2021-03-11 00:30:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5428 transitions. [2021-03-11 00:30:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:43,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:43,039 INFO L519 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] [2021-03-11 00:30:43,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-03-11 00:30:43,240 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:43,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-03-11 00:30:43,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:43,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008819626] [2021-03-11 00:30:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:43,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008819626] [2021-03-11 00:30:43,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642114095] [2021-03-11 00:30:43,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:43,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:30:43,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:43,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:43,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:43,744 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 [2021-03-11 00:30:43,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:43,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:43,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:43,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:30:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:43,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:43,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:30:43,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896185637] [2021-03-11 00:30:43,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:30:43,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:43,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:30:43,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:30:43,769 INFO L87 Difference]: Start difference. First operand 1588 states and 5428 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) [2021-03-11 00:30:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:45,035 INFO L93 Difference]: Finished difference Result 2065 states and 6822 transitions. [2021-03-11 00:30:45,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:30:45,035 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 [2021-03-11 00:30:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:45,039 INFO L225 Difference]: With dead ends: 2065 [2021-03-11 00:30:45,039 INFO L226 Difference]: Without dead ends: 2043 [2021-03-11 00:30:45,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:30:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-03-11 00:30:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1580. [2021-03-11 00:30:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-03-11 00:30:45,065 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-03-11 00:30:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:45,065 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-03-11 00:30:45,065 INFO L481 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) [2021-03-11 00:30:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-03-11 00:30:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:45,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:45,068 INFO L519 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] [2021-03-11 00:30:45,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-03-11 00:30:45,269 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-03-11 00:30:45,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:45,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588011571] [2021-03-11 00:30:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:45,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588011571] [2021-03-11 00:30:45,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121967296] [2021-03-11 00:30:45,719 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:45,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:45,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:30:45,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:30:45,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:45,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:45,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:45,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:30:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:45,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:45,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:30:45,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545634088] [2021-03-11 00:30:45,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:30:45,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:30:45,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:30:45,976 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 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) [2021-03-11 00:30:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:47,998 INFO L93 Difference]: Finished difference Result 2212 states and 7331 transitions. [2021-03-11 00:30:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:30:47,998 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 [2021-03-11 00:30:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:48,011 INFO L225 Difference]: With dead ends: 2212 [2021-03-11 00:30:48,012 INFO L226 Difference]: Without dead ends: 2197 [2021-03-11 00:30:48,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1883.3ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:30:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-03-11 00:30:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1580. [2021-03-11 00:30:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4198860037998733) internal successors, (5400), 1579 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5400 transitions. [2021-03-11 00:30:48,040 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5400 transitions. Word has length 26 [2021-03-11 00:30:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:48,040 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 5400 transitions. [2021-03-11 00:30:48,040 INFO L481 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) [2021-03-11 00:30:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5400 transitions. [2021-03-11 00:30:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:48,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:48,043 INFO L519 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] [2021-03-11 00:30:48,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:48,245 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-03-11 00:30:48,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:48,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482166083] [2021-03-11 00:30:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:48,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482166083] [2021-03-11 00:30:48,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260073854] [2021-03-11 00:30:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:48,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:30:48,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:48,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:48,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:48,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:48,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:30:48,908 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 [2021-03-11 00:30:48,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:30:49,076 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-11 00:30:49,077 INFO L628 ElimStorePlain]: treesize reduction 79, result has 51.8 percent of original size [2021-03-11 00:30:49,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:49,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:293 [2021-03-11 00:30:49,227 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2021-03-11 00:30:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:49,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:49,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-03-11 00:30:49,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747397220] [2021-03-11 00:30:49,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:30:49,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:30:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:30:49,353 INFO L87 Difference]: Start difference. First operand 1580 states and 5400 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:51,361 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-11 00:30:51,849 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-11 00:30:52,181 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-11 00:30:52,519 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:30:52,668 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-11 00:30:52,819 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:30:53,736 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-11 00:30:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:54,644 INFO L93 Difference]: Finished difference Result 2788 states and 8924 transitions. [2021-03-11 00:30:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:30:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 [2021-03-11 00:30:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:54,649 INFO L225 Difference]: With dead ends: 2788 [2021-03-11 00:30:54,649 INFO L226 Difference]: Without dead ends: 2747 [2021-03-11 00:30:54,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 4346.2ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:30:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-03-11 00:30:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1590. [2021-03-11 00:30:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.42039018250472) internal successors, (5435), 1589 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5435 transitions. [2021-03-11 00:30:54,674 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5435 transitions. Word has length 26 [2021-03-11 00:30:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:54,675 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 5435 transitions. [2021-03-11 00:30:54,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5435 transitions. [2021-03-11 00:30:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:54,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:54,677 INFO L519 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] [2021-03-11 00:30:54,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:54,877 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-03-11 00:30:54,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:54,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624501888] [2021-03-11 00:30:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:55,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624501888] [2021-03-11 00:30:55,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42509538] [2021-03-11 00:30:55,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:30:55,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:30:55,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:30:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:30:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:30:55,413 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:30:55,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 98 treesize of output 94 [2021-03-11 00:30:55,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:30:55,463 INFO L628 ElimStorePlain]: treesize reduction 84, result has 27.6 percent of original size [2021-03-11 00:30:55,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:30:55,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:106, output treesize:46 [2021-03-11 00:30:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:55,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:30:55,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:30:55,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141204564] [2021-03-11 00:30:55,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:30:55,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:30:55,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:30:55,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:30:55,577 INFO L87 Difference]: Start difference. First operand 1590 states and 5435 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:56,452 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:30:57,385 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-11 00:30:57,519 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-11 00:30:57,666 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-03-11 00:30:58,729 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:30:58,879 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:30:59,028 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-11 00:30:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:30:59,157 INFO L93 Difference]: Finished difference Result 2573 states and 8472 transitions. [2021-03-11 00:30:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:30:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 [2021-03-11 00:30:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:30:59,164 INFO L225 Difference]: With dead ends: 2573 [2021-03-11 00:30:59,164 INFO L226 Difference]: Without dead ends: 2532 [2021-03-11 00:30:59,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 3138.3ms TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:30:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-03-11 00:30:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1583. [2021-03-11 00:30:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4190897597977243) internal successors, (5409), 1582 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5409 transitions. [2021-03-11 00:30:59,201 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5409 transitions. Word has length 26 [2021-03-11 00:30:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:30:59,201 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 5409 transitions. [2021-03-11 00:30:59,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:30:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5409 transitions. [2021-03-11 00:30:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:30:59,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:30:59,205 INFO L519 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] [2021-03-11 00:30:59,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-11 00:30:59,408 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:30:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:30:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-03-11 00:30:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:30:59,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212734640] [2021-03-11 00:30:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:30:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:30:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:30:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212734640] [2021-03-11 00:30:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335550444] [2021-03-11 00:30:59,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:30:59,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:30:59,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:30:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:30:59,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:00,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:00,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:31:00,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:00,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:00,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:00,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:31:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:00,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:00,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-03-11 00:31:00,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698340756] [2021-03-11 00:31:00,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:00,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:00,314 INFO L87 Difference]: Start difference. First operand 1583 states and 5409 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) [2021-03-11 00:31:00,732 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-03-11 00:31:01,210 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-11 00:31:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:02,637 INFO L93 Difference]: Finished difference Result 2559 states and 8411 transitions. [2021-03-11 00:31:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:31:02,638 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 [2021-03-11 00:31:02,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:02,642 INFO L225 Difference]: With dead ends: 2559 [2021-03-11 00:31:02,642 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:31:02,643 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2077.5ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:31:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:31:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1594. [2021-03-11 00:31:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.4199623352165727) internal successors, (5448), 1593 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5448 transitions. [2021-03-11 00:31:02,666 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5448 transitions. Word has length 26 [2021-03-11 00:31:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:02,666 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5448 transitions. [2021-03-11 00:31:02,666 INFO L481 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) [2021-03-11 00:31:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5448 transitions. [2021-03-11 00:31:02,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:02,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:02,669 INFO L519 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] [2021-03-11 00:31:02,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-11 00:31:02,869 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash -54538374, now seen corresponding path program 53 times [2021-03-11 00:31:02,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:02,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322438779] [2021-03-11 00:31:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:03,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322438779] [2021-03-11 00:31:03,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429834545] [2021-03-11 00:31:03,093 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 [2021-03-11 00:31:03,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:31:03,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:03,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:03,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:03,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:03,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:03,286 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 [2021-03-11 00:31:03,292 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:31:03,310 INFO L628 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2021-03-11 00:31:03,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:03,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-03-11 00:31:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:03,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:03,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-03-11 00:31:03,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779030950] [2021-03-11 00:31:03,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:31:03,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:31:03,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:03,360 INFO L87 Difference]: Start difference. First operand 1594 states and 5448 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) [2021-03-11 00:31:04,293 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-11 00:31:04,456 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-03-11 00:31:06,497 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-11 00:31:06,801 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-03-11 00:31:07,005 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-03-11 00:31:07,576 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:31:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:08,947 INFO L93 Difference]: Finished difference Result 3314 states and 10467 transitions. [2021-03-11 00:31:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-11 00:31:08,948 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 [2021-03-11 00:31:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:08,954 INFO L225 Difference]: With dead ends: 3314 [2021-03-11 00:31:08,954 INFO L226 Difference]: Without dead ends: 3267 [2021-03-11 00:31:08,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 4150.7ms TimeCoverageRelationStatistics Valid=884, Invalid=4372, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:31:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-03-11 00:31:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1619. [2021-03-11 00:31:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.4283065512978985) internal successors, (5547), 1618 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5547 transitions. [2021-03-11 00:31:08,983 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5547 transitions. Word has length 26 [2021-03-11 00:31:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:08,984 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5547 transitions. [2021-03-11 00:31:08,984 INFO L481 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) [2021-03-11 00:31:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5547 transitions. [2021-03-11 00:31:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:08,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:08,986 INFO L519 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] [2021-03-11 00:31:09,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-11 00:31:09,186 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:09,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 30 times [2021-03-11 00:31:09,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:09,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424766821] [2021-03-11 00:31:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:09,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424766821] [2021-03-11 00:31:09,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174723780] [2021-03-11 00:31:09,342 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 [2021-03-11 00:31:09,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:31:09,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:09,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:09,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:09,614 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:31:09,614 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 48 [2021-03-11 00:31:09,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:09,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:09,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:09,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:17 [2021-03-11 00:31:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:09,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:09,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:31:09,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305753730] [2021-03-11 00:31:09,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:31:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:31:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:09,685 INFO L87 Difference]: Start difference. First operand 1619 states and 5547 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) [2021-03-11 00:31:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:11,416 INFO L93 Difference]: Finished difference Result 2129 states and 7041 transitions. [2021-03-11 00:31:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:31:11,417 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 [2021-03-11 00:31:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:11,422 INFO L225 Difference]: With dead ends: 2129 [2021-03-11 00:31:11,422 INFO L226 Difference]: Without dead ends: 2114 [2021-03-11 00:31:11,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1140.1ms TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:31:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-03-11 00:31:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1607. [2021-03-11 00:31:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.430884184308842) internal successors, (5510), 1606 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5510 transitions. [2021-03-11 00:31:11,458 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5510 transitions. Word has length 26 [2021-03-11 00:31:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:11,458 INFO L480 AbstractCegarLoop]: Abstraction has 1607 states and 5510 transitions. [2021-03-11 00:31:11,458 INFO L481 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) [2021-03-11 00:31:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5510 transitions. [2021-03-11 00:31:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:11,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:11,461 INFO L519 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] [2021-03-11 00:31:11,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-03-11 00:31:11,662 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:11,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1033146674, now seen corresponding path program 31 times [2021-03-11 00:31:11,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:11,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961119033] [2021-03-11 00:31:11,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:11,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961119033] [2021-03-11 00:31:11,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130655148] [2021-03-11 00:31:11,915 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 [2021-03-11 00:31:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:12,309 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 [2021-03-11 00:31:12,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:12,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:12,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:12,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:31:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:12,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:12,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:31:12,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856837088] [2021-03-11 00:31:12,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:12,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:12,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:12,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:12,366 INFO L87 Difference]: Start difference. First operand 1607 states and 5510 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) [2021-03-11 00:31:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:12,894 INFO L93 Difference]: Finished difference Result 1918 states and 6461 transitions. [2021-03-11 00:31:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:31:12,895 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 [2021-03-11 00:31:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:12,900 INFO L225 Difference]: With dead ends: 1918 [2021-03-11 00:31:12,900 INFO L226 Difference]: Without dead ends: 1903 [2021-03-11 00:31:12,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 584.2ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2021-03-11 00:31:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1601. [2021-03-11 00:31:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.430625) internal successors, (5489), 1600 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5489 transitions. [2021-03-11 00:31:12,931 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5489 transitions. Word has length 26 [2021-03-11 00:31:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:12,931 INFO L480 AbstractCegarLoop]: Abstraction has 1601 states and 5489 transitions. [2021-03-11 00:31:12,932 INFO L481 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) [2021-03-11 00:31:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5489 transitions. [2021-03-11 00:31:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:12,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:12,935 INFO L519 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] [2021-03-11 00:31:13,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-03-11 00:31:13,136 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:13,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:13,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 32 times [2021-03-11 00:31:13,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:13,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145034086] [2021-03-11 00:31:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145034086] [2021-03-11 00:31:13,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403567414] [2021-03-11 00:31:13,366 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 [2021-03-11 00:31:13,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:31:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:13,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:31:13,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:13,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:13,692 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-03-11 00:31:13,693 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 64 treesize of output 59 [2021-03-11 00:31:13,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:13,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:13,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:13,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:74, output treesize:32 [2021-03-11 00:31:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:13,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:13,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:31:13,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865383443] [2021-03-11 00:31:13,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:31:13,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:31:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:13,848 INFO L87 Difference]: Start difference. First operand 1601 states and 5489 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:31:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:15,421 INFO L93 Difference]: Finished difference Result 2777 states and 9028 transitions. [2021-03-11 00:31:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:31:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:31:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:15,427 INFO L225 Difference]: With dead ends: 2777 [2021-03-11 00:31:15,427 INFO L226 Difference]: Without dead ends: 2726 [2021-03-11 00:31:15,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1454.6ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:31:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-03-11 00:31:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1631. [2021-03-11 00:31:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-03-11 00:31:15,452 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-03-11 00:31:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:15,452 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-03-11 00:31:15,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:31:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-03-11 00:31:15,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:15,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:15,455 INFO L519 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] [2021-03-11 00:31:15,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:15,655 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:15,656 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 33 times [2021-03-11 00:31:15,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:15,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388179646] [2021-03-11 00:31:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:15,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388179646] [2021-03-11 00:31:15,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76832750] [2021-03-11 00:31:15,858 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 [2021-03-11 00:31:15,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:31:15,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:15,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:16,127 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:31:16,127 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 41 [2021-03-11 00:31:16,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:16,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:16,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:16,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:5 [2021-03-11 00:31:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:16,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:16,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:31:16,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099371433] [2021-03-11 00:31:16,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:16,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:16,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:16,155 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 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) [2021-03-11 00:31:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:16,706 INFO L93 Difference]: Finished difference Result 2060 states and 6895 transitions. [2021-03-11 00:31:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:31:16,707 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 [2021-03-11 00:31:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:16,711 INFO L225 Difference]: With dead ends: 2060 [2021-03-11 00:31:16,711 INFO L226 Difference]: Without dead ends: 2039 [2021-03-11 00:31:16,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:31:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-03-11 00:31:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1631. [2021-03-11 00:31:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.4404907975460124) internal successors, (5608), 1630 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5608 transitions. [2021-03-11 00:31:16,733 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5608 transitions. Word has length 26 [2021-03-11 00:31:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:16,733 INFO L480 AbstractCegarLoop]: Abstraction has 1631 states and 5608 transitions. [2021-03-11 00:31:16,734 INFO L481 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) [2021-03-11 00:31:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5608 transitions. [2021-03-11 00:31:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:16,736 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:16,736 INFO L519 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] [2021-03-11 00:31:16,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-03-11 00:31:16,951 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash -716780640, now seen corresponding path program 34 times [2021-03-11 00:31:16,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:16,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605307666] [2021-03-11 00:31:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:17,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605307666] [2021-03-11 00:31:17,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287608351] [2021-03-11 00:31:17,184 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 [2021-03-11 00:31:17,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:31:17,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:17,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:17,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:17,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:17,535 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 [2021-03-11 00:31:17,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:17,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:17,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:17,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:31:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:17,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:17,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:31:17,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455527117] [2021-03-11 00:31:17,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:17,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:17,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:17,587 INFO L87 Difference]: Start difference. First operand 1631 states and 5608 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) [2021-03-11 00:31:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:18,198 INFO L93 Difference]: Finished difference Result 1947 states and 6547 transitions. [2021-03-11 00:31:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:31:18,200 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 [2021-03-11 00:31:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:18,204 INFO L225 Difference]: With dead ends: 1947 [2021-03-11 00:31:18,204 INFO L226 Difference]: Without dead ends: 1928 [2021-03-11 00:31:18,205 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 603.8ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-03-11 00:31:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1625. [2021-03-11 00:31:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.440270935960591) internal successors, (5587), 1624 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5587 transitions. [2021-03-11 00:31:18,236 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5587 transitions. Word has length 26 [2021-03-11 00:31:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:18,236 INFO L480 AbstractCegarLoop]: Abstraction has 1625 states and 5587 transitions. [2021-03-11 00:31:18,236 INFO L481 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) [2021-03-11 00:31:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5587 transitions. [2021-03-11 00:31:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:18,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:18,239 INFO L519 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] [2021-03-11 00:31:18,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:18,440 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 475685792, now seen corresponding path program 35 times [2021-03-11 00:31:18,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:18,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491097249] [2021-03-11 00:31:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:18,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491097249] [2021-03-11 00:31:18,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485662903] [2021-03-11 00:31:18,748 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 [2021-03-11 00:31:18,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:31:18,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:31:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:19,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:19,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:19,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-03-11 00:31:19,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:19,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:19,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:19,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:125 [2021-03-11 00:31:19,257 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-11 00:31:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:19,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:19,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:31:19,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355889561] [2021-03-11 00:31:19,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:19,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:19,357 INFO L87 Difference]: Start difference. First operand 1625 states and 5587 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) [2021-03-11 00:31:19,846 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:31:20,331 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-03-11 00:31:22,739 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:31:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:23,080 INFO L93 Difference]: Finished difference Result 2536 states and 8195 transitions. [2021-03-11 00:31:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:31:23,081 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 [2021-03-11 00:31:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:23,086 INFO L225 Difference]: With dead ends: 2536 [2021-03-11 00:31:23,086 INFO L226 Difference]: Without dead ends: 2486 [2021-03-11 00:31:23,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2779.7ms TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:31:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-03-11 00:31:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1619. [2021-03-11 00:31:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.434487021013597) internal successors, (5557), 1618 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5557 transitions. [2021-03-11 00:31:23,115 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5557 transitions. Word has length 26 [2021-03-11 00:31:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:23,115 INFO L480 AbstractCegarLoop]: Abstraction has 1619 states and 5557 transitions. [2021-03-11 00:31:23,115 INFO L481 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) [2021-03-11 00:31:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5557 transitions. [2021-03-11 00:31:23,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:23,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:23,118 INFO L519 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] [2021-03-11 00:31:23,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:23,318 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:23,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1353247494, now seen corresponding path program 36 times [2021-03-11 00:31:23,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:23,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248504932] [2021-03-11 00:31:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248504932] [2021-03-11 00:31:23,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548663701] [2021-03-11 00:31:23,574 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 [2021-03-11 00:31:23,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:31:23,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:23,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:23,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:23,792 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 [2021-03-11 00:31:23,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:23,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:23,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:23,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:31:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:23,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:23,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:31:23,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722323385] [2021-03-11 00:31:23,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:23,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:23,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:23,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:23,827 INFO L87 Difference]: Start difference. First operand 1619 states and 5557 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) [2021-03-11 00:31:24,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:24,042 INFO L93 Difference]: Finished difference Result 1694 states and 5722 transitions. [2021-03-11 00:31:24,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:31:24,043 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 [2021-03-11 00:31:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:24,046 INFO L225 Difference]: With dead ends: 1694 [2021-03-11 00:31:24,046 INFO L226 Difference]: Without dead ends: 1675 [2021-03-11 00:31:24,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-03-11 00:31:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1611. [2021-03-11 00:31:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.432919254658385) internal successors, (5527), 1610 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5527 transitions. [2021-03-11 00:31:24,064 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5527 transitions. Word has length 26 [2021-03-11 00:31:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:24,064 INFO L480 AbstractCegarLoop]: Abstraction has 1611 states and 5527 transitions. [2021-03-11 00:31:24,064 INFO L481 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) [2021-03-11 00:31:24,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5527 transitions. [2021-03-11 00:31:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:24,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:24,067 INFO L519 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] [2021-03-11 00:31:24,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:24,267 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 37 times [2021-03-11 00:31:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:24,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144589643] [2021-03-11 00:31:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144589643] [2021-03-11 00:31:24,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480721402] [2021-03-11 00:31:24,461 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 [2021-03-11 00:31:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:24,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:24,697 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:31:24,698 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 [2021-03-11 00:31:24,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:24,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:24,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:24,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-03-11 00:31:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:24,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:24,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:31:24,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373548909] [2021-03-11 00:31:24,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:24,729 INFO L87 Difference]: Start difference. First operand 1611 states and 5527 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) [2021-03-11 00:31:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:25,031 INFO L93 Difference]: Finished difference Result 1742 states and 5886 transitions. [2021-03-11 00:31:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:31:25,031 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 [2021-03-11 00:31:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:25,034 INFO L225 Difference]: With dead ends: 1742 [2021-03-11 00:31:25,034 INFO L226 Difference]: Without dead ends: 1727 [2021-03-11 00:31:25,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-03-11 00:31:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1599. [2021-03-11 00:31:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4399249061326658) internal successors, (5497), 1598 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5497 transitions. [2021-03-11 00:31:25,054 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5497 transitions. Word has length 26 [2021-03-11 00:31:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:25,054 INFO L480 AbstractCegarLoop]: Abstraction has 1599 states and 5497 transitions. [2021-03-11 00:31:25,054 INFO L481 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) [2021-03-11 00:31:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5497 transitions. [2021-03-11 00:31:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:25,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:25,056 INFO L519 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] [2021-03-11 00:31:25,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-03-11 00:31:25,272 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:25,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:25,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1929714430, now seen corresponding path program 38 times [2021-03-11 00:31:25,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:25,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135919969] [2021-03-11 00:31:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135919969] [2021-03-11 00:31:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22198316] [2021-03-11 00:31:25,444 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 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 [2021-03-11 00:31:25,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:31:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:25,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:25,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:25,660 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 [2021-03-11 00:31:25,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:25,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:25,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:25,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-11 00:31:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:25,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:25,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:31:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944406520] [2021-03-11 00:31:25,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:25,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:25,726 INFO L87 Difference]: Start difference. First operand 1599 states and 5497 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) [2021-03-11 00:31:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:26,944 INFO L93 Difference]: Finished difference Result 2325 states and 7667 transitions. [2021-03-11 00:31:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:31:26,945 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 [2021-03-11 00:31:26,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:26,948 INFO L225 Difference]: With dead ends: 2325 [2021-03-11 00:31:26,949 INFO L226 Difference]: Without dead ends: 2279 [2021-03-11 00:31:26,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:31:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-03-11 00:31:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1606. [2021-03-11 00:31:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.4386292834890964) internal successors, (5519), 1605 states have internal predecessors, (5519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5519 transitions. [2021-03-11 00:31:26,978 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5519 transitions. Word has length 26 [2021-03-11 00:31:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:26,978 INFO L480 AbstractCegarLoop]: Abstraction has 1606 states and 5519 transitions. [2021-03-11 00:31:26,978 INFO L481 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) [2021-03-11 00:31:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5519 transitions. [2021-03-11 00:31:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:26,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:26,981 INFO L519 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] [2021-03-11 00:31:27,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-03-11 00:31:27,183 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:27,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1357140426, now seen corresponding path program 39 times [2021-03-11 00:31:27,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:27,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552817699] [2021-03-11 00:31:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:27,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552817699] [2021-03-11 00:31:27,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003967300] [2021-03-11 00:31:27,439 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 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 [2021-03-11 00:31:27,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:31:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:27,827 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:31:27,828 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 [2021-03-11 00:31:27,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:27,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:27,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:31:27,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-03-11 00:31:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:28,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:28,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:31:28,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196644190] [2021-03-11 00:31:28,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:28,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:28,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:28,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:28,041 INFO L87 Difference]: Start difference. First operand 1606 states and 5519 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) [2021-03-11 00:31:28,442 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-03-11 00:31:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:29,456 INFO L93 Difference]: Finished difference Result 2392 states and 7918 transitions. [2021-03-11 00:31:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:31:29,458 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 [2021-03-11 00:31:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:29,463 INFO L225 Difference]: With dead ends: 2392 [2021-03-11 00:31:29,463 INFO L226 Difference]: Without dead ends: 2373 [2021-03-11 00:31:29,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1400.9ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:31:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-03-11 00:31:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1609. [2021-03-11 00:31:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 3.4353233830845773) internal successors, (5524), 1608 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 5524 transitions. [2021-03-11 00:31:29,500 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 5524 transitions. Word has length 26 [2021-03-11 00:31:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:29,500 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 5524 transitions. [2021-03-11 00:31:29,501 INFO L481 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) [2021-03-11 00:31:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 5524 transitions. [2021-03-11 00:31:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:29,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:29,504 INFO L519 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] [2021-03-11 00:31:29,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:29,705 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:29,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:29,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 40 times [2021-03-11 00:31:29,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:29,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012132097] [2021-03-11 00:31:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012132097] [2021-03-11 00:31:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360883767] [2021-03-11 00:31:29,968 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 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 [2021-03-11 00:31:29,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:31:29,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:29,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:30,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:30,304 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 [2021-03-11 00:31:30,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:30,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:30,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:30,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-03-11 00:31:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:30,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:30,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:31:30,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702438397] [2021-03-11 00:31:30,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:30,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:30,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:30,425 INFO L87 Difference]: Start difference. First operand 1609 states and 5524 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) [2021-03-11 00:31:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:31,180 INFO L93 Difference]: Finished difference Result 2162 states and 7222 transitions. [2021-03-11 00:31:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:31:31,181 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 [2021-03-11 00:31:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:31,185 INFO L225 Difference]: With dead ends: 2162 [2021-03-11 00:31:31,185 INFO L226 Difference]: Without dead ends: 2137 [2021-03-11 00:31:31,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 821.0ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:31:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-03-11 00:31:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1600. [2021-03-11 00:31:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.434021263289556) internal successors, (5491), 1599 states have internal predecessors, (5491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5491 transitions. [2021-03-11 00:31:31,214 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5491 transitions. Word has length 26 [2021-03-11 00:31:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:31,214 INFO L480 AbstractCegarLoop]: Abstraction has 1600 states and 5491 transitions. [2021-03-11 00:31:31,215 INFO L481 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) [2021-03-11 00:31:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5491 transitions. [2021-03-11 00:31:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:31,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:31,218 INFO L519 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] [2021-03-11 00:31:31,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-03-11 00:31:31,429 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -48158490, now seen corresponding path program 41 times [2021-03-11 00:31:31,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:31,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756475769] [2021-03-11 00:31:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:31,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756475769] [2021-03-11 00:31:31,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995665663] [2021-03-11 00:31:31,604 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 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 [2021-03-11 00:31:31,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:31:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:31,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:31,910 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-03-11 00:31:31,910 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 [2021-03-11 00:31:31,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:31,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:31,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:31,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-03-11 00:31:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:31,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:31,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:31:31,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374372679] [2021-03-11 00:31:31,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:31:31,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:31:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:31,942 INFO L87 Difference]: Start difference. First operand 1600 states and 5491 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:31:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:32,556 INFO L93 Difference]: Finished difference Result 2058 states and 6891 transitions. [2021-03-11 00:31:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:31:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:31:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:32,561 INFO L225 Difference]: With dead ends: 2058 [2021-03-11 00:31:32,561 INFO L226 Difference]: Without dead ends: 2043 [2021-03-11 00:31:32,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 677.4ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:31:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-03-11 00:31:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1589. [2021-03-11 00:31:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.434508816120907) internal successors, (5454), 1588 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5454 transitions. [2021-03-11 00:31:32,586 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5454 transitions. Word has length 26 [2021-03-11 00:31:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:32,586 INFO L480 AbstractCegarLoop]: Abstraction has 1589 states and 5454 transitions. [2021-03-11 00:31:32,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:31:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5454 transitions. [2021-03-11 00:31:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:32,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:32,589 INFO L519 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] [2021-03-11 00:31:32,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:32,789 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 42 times [2021-03-11 00:31:32,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:32,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567275114] [2021-03-11 00:31:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567275114] [2021-03-11 00:31:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140013787] [2021-03-11 00:31:32,938 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 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 [2021-03-11 00:31:32,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:31:32,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:31:32,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:33,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:33,185 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 22 treesize of output 32 [2021-03-11 00:31:33,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:33,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:33,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:33,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:25 [2021-03-11 00:31:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:33,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:33,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:31:33,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339914195] [2021-03-11 00:31:33,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:31:33,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:31:33,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:33,261 INFO L87 Difference]: Start difference. First operand 1589 states and 5454 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) [2021-03-11 00:31:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:34,945 INFO L93 Difference]: Finished difference Result 2237 states and 7390 transitions. [2021-03-11 00:31:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:31:34,947 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 [2021-03-11 00:31:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:34,952 INFO L225 Difference]: With dead ends: 2237 [2021-03-11 00:31:34,952 INFO L226 Difference]: Without dead ends: 2207 [2021-03-11 00:31:34,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1163.3ms TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:31:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-03-11 00:31:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1640. [2021-03-11 00:31:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.4283099450884684) internal successors, (5619), 1639 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5619 transitions. [2021-03-11 00:31:34,999 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5619 transitions. Word has length 26 [2021-03-11 00:31:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:34,999 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 5619 transitions. [2021-03-11 00:31:34,999 INFO L481 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) [2021-03-11 00:31:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5619 transitions. [2021-03-11 00:31:35,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:35,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:35,003 INFO L519 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] [2021-03-11 00:31:35,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:35,217 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 43 times [2021-03-11 00:31:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:35,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720612258] [2021-03-11 00:31:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:35,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720612258] [2021-03-11 00:31:35,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133419875] [2021-03-11 00:31:35,478 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 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 [2021-03-11 00:31:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:35,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:35,800 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:31:35,800 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 [2021-03-11 00:31:35,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:35,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:35,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:35,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-03-11 00:31:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:35,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:35,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:31:35,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976586861] [2021-03-11 00:31:35,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:35,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:35,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:35,920 INFO L87 Difference]: Start difference. First operand 1640 states and 5619 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) [2021-03-11 00:31:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:36,956 INFO L93 Difference]: Finished difference Result 2346 states and 7809 transitions. [2021-03-11 00:31:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:31:36,957 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 [2021-03-11 00:31:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:36,963 INFO L225 Difference]: With dead ends: 2346 [2021-03-11 00:31:36,963 INFO L226 Difference]: Without dead ends: 2331 [2021-03-11 00:31:36,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 971.5ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:31:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-03-11 00:31:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1634. [2021-03-11 00:31:36,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.4280465401102265) internal successors, (5598), 1633 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5598 transitions. [2021-03-11 00:31:36,999 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5598 transitions. Word has length 26 [2021-03-11 00:31:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:37,000 INFO L480 AbstractCegarLoop]: Abstraction has 1634 states and 5598 transitions. [2021-03-11 00:31:37,000 INFO L481 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) [2021-03-11 00:31:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5598 transitions. [2021-03-11 00:31:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:37,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:37,003 INFO L519 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] [2021-03-11 00:31:37,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-03-11 00:31:37,204 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:37,204 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 44 times [2021-03-11 00:31:37,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:37,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997682624] [2021-03-11 00:31:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:37,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997682624] [2021-03-11 00:31:37,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689032024] [2021-03-11 00:31:37,474 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 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 [2021-03-11 00:31:37,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:31:37,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:31:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:37,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:37,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:37,830 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 [2021-03-11 00:31:37,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:37,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:37,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:31:37,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-03-11 00:31:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:38,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:38,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:31:38,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76158637] [2021-03-11 00:31:38,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:38,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:38,036 INFO L87 Difference]: Start difference. First operand 1634 states and 5598 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) [2021-03-11 00:31:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:38,712 INFO L93 Difference]: Finished difference Result 2148 states and 7204 transitions. [2021-03-11 00:31:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:31:38,712 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 [2021-03-11 00:31:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:38,716 INFO L225 Difference]: With dead ends: 2148 [2021-03-11 00:31:38,717 INFO L226 Difference]: Without dead ends: 2133 [2021-03-11 00:31:38,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 920.1ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:31:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-03-11 00:31:38,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1637. [2021-03-11 00:31:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.4315403422982884) internal successors, (5614), 1636 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) [2021-03-11 00:31:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5614 transitions. [2021-03-11 00:31:38,741 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5614 transitions. Word has length 26 [2021-03-11 00:31:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:38,741 INFO L480 AbstractCegarLoop]: Abstraction has 1637 states and 5614 transitions. [2021-03-11 00:31:38,741 INFO L481 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) [2021-03-11 00:31:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5614 transitions. [2021-03-11 00:31:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:38,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:38,743 INFO L519 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] [2021-03-11 00:31:38,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-03-11 00:31:38,944 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 45 times [2021-03-11 00:31:38,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:38,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555477563] [2021-03-11 00:31:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555477563] [2021-03-11 00:31:39,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340964963] [2021-03-11 00:31:39,079 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 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 [2021-03-11 00:31:39,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:31:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:39,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:31:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:39,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:39,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:39,286 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 25 treesize of output 31 [2021-03-11 00:31:39,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:39,347 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.1 percent of original size [2021-03-11 00:31:39,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:31:39,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:76 [2021-03-11 00:31:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:39,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:39,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-11 00:31:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223219990] [2021-03-11 00:31:39,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:31:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:31:39,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:31:39,466 INFO L87 Difference]: Start difference. First operand 1637 states and 5614 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:40,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:40,007 INFO L93 Difference]: Finished difference Result 2178 states and 7300 transitions. [2021-03-11 00:31:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:31:40,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 26 [2021-03-11 00:31:40,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:40,012 INFO L225 Difference]: With dead ends: 2178 [2021-03-11 00:31:40,012 INFO L226 Difference]: Without dead ends: 2163 [2021-03-11 00:31:40,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:31:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-03-11 00:31:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1655. [2021-03-11 00:31:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.4268440145102783) internal successors, (5668), 1654 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5668 transitions. [2021-03-11 00:31:40,034 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5668 transitions. Word has length 26 [2021-03-11 00:31:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:40,034 INFO L480 AbstractCegarLoop]: Abstraction has 1655 states and 5668 transitions. [2021-03-11 00:31:40,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5668 transitions. [2021-03-11 00:31:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:40,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:40,036 INFO L519 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] [2021-03-11 00:31:40,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:40,236 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 46 times [2021-03-11 00:31:40,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:40,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103177410] [2021-03-11 00:31:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:40,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103177410] [2021-03-11 00:31:40,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150342809] [2021-03-11 00:31:40,378 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 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 [2021-03-11 00:31:40,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:31:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:40,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:40,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:40,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-03-11 00:31:40,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:40,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:40,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:40,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-03-11 00:31:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:40,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:40,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:31:40,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200536914] [2021-03-11 00:31:40,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:40,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:40,652 INFO L87 Difference]: Start difference. First operand 1655 states and 5668 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) [2021-03-11 00:31:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:42,352 INFO L93 Difference]: Finished difference Result 2191 states and 7346 transitions. [2021-03-11 00:31:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:31:42,353 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 [2021-03-11 00:31:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:42,358 INFO L225 Difference]: With dead ends: 2191 [2021-03-11 00:31:42,359 INFO L226 Difference]: Without dead ends: 2176 [2021-03-11 00:31:42,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:31:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-03-11 00:31:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1673. [2021-03-11 00:31:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.424043062200957) internal successors, (5725), 1672 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5725 transitions. [2021-03-11 00:31:42,394 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5725 transitions. Word has length 26 [2021-03-11 00:31:42,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:42,394 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 5725 transitions. [2021-03-11 00:31:42,394 INFO L481 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) [2021-03-11 00:31:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5725 transitions. [2021-03-11 00:31:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:42,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:42,398 INFO L519 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] [2021-03-11 00:31:42,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-03-11 00:31:42,598 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 47 times [2021-03-11 00:31:42,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:42,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34753678] [2021-03-11 00:31:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:42,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34753678] [2021-03-11 00:31:42,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488272980] [2021-03-11 00:31:42,871 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 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 [2021-03-11 00:31:42,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:31:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:42,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:31:42,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:43,285 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:31:43,286 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 [2021-03-11 00:31:43,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:43,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:43,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:31:43,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:75 [2021-03-11 00:31:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:43,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:43,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:31:43,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957596526] [2021-03-11 00:31:43,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:31:43,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:31:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:31:43,518 INFO L87 Difference]: Start difference. First operand 1673 states and 5725 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) [2021-03-11 00:31:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:44,706 INFO L93 Difference]: Finished difference Result 2244 states and 7491 transitions. [2021-03-11 00:31:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:31:44,707 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 [2021-03-11 00:31:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:44,712 INFO L225 Difference]: With dead ends: 2244 [2021-03-11 00:31:44,712 INFO L226 Difference]: Without dead ends: 2219 [2021-03-11 00:31:44,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1186.5ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:31:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-03-11 00:31:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1674. [2021-03-11 00:31:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4273759713090257) internal successors, (5734), 1673 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5734 transitions. [2021-03-11 00:31:44,748 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5734 transitions. Word has length 26 [2021-03-11 00:31:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:44,748 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 5734 transitions. [2021-03-11 00:31:44,748 INFO L481 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) [2021-03-11 00:31:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5734 transitions. [2021-03-11 00:31:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:44,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:44,751 INFO L519 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] [2021-03-11 00:31:44,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:44,952 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 48 times [2021-03-11 00:31:44,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:44,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644452243] [2021-03-11 00:31:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:45,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644452243] [2021-03-11 00:31:45,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196839509] [2021-03-11 00:31:45,211 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 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 [2021-03-11 00:31:45,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:31:45,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:45,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:45,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:45,517 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 [2021-03-11 00:31:45,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:45,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:45,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:45,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:31:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:45,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:45,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:31:45,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119871906] [2021-03-11 00:31:45,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:45,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:45,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:45,630 INFO L87 Difference]: Start difference. First operand 1674 states and 5734 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) [2021-03-11 00:31:46,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:46,558 INFO L93 Difference]: Finished difference Result 2307 states and 7682 transitions. [2021-03-11 00:31:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:31:46,559 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 [2021-03-11 00:31:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:46,563 INFO L225 Difference]: With dead ends: 2307 [2021-03-11 00:31:46,563 INFO L226 Difference]: Without dead ends: 2271 [2021-03-11 00:31:46,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 990.2ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:31:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-03-11 00:31:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1692. [2021-03-11 00:31:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4299231224127733) internal successors, (5800), 1691 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5800 transitions. [2021-03-11 00:31:46,585 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5800 transitions. Word has length 26 [2021-03-11 00:31:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:46,585 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5800 transitions. [2021-03-11 00:31:46,585 INFO L481 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) [2021-03-11 00:31:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5800 transitions. [2021-03-11 00:31:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:46,588 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:46,588 INFO L519 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] [2021-03-11 00:31:46,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-03-11 00:31:46,791 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2134220646, now seen corresponding path program 54 times [2021-03-11 00:31:46,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:46,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268252560] [2021-03-11 00:31:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:47,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268252560] [2021-03-11 00:31:47,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519696894] [2021-03-11 00:31:47,122 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 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 [2021-03-11 00:31:47,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:31:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:47,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:47,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:47,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:47,290 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 [2021-03-11 00:31:47,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:47,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:47,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:47,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:31:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:47,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:47,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-03-11 00:31:47,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328279866] [2021-03-11 00:31:47,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:31:47,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:31:47,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:31:47,321 INFO L87 Difference]: Start difference. First operand 1692 states and 5800 transitions. Second operand has 16 states, 16 states have (on average 2.8125) 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) [2021-03-11 00:31:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:48,140 INFO L93 Difference]: Finished difference Result 2173 states and 7209 transitions. [2021-03-11 00:31:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:31:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) 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 26 [2021-03-11 00:31:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:48,145 INFO L225 Difference]: With dead ends: 2173 [2021-03-11 00:31:48,145 INFO L226 Difference]: Without dead ends: 2147 [2021-03-11 00:31:48,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 942.6ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:31:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-03-11 00:31:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1684. [2021-03-11 00:31:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4307783719548426) internal successors, (5774), 1683 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5774 transitions. [2021-03-11 00:31:48,166 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5774 transitions. Word has length 26 [2021-03-11 00:31:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:48,176 INFO L480 AbstractCegarLoop]: Abstraction has 1684 states and 5774 transitions. [2021-03-11 00:31:48,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) 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) [2021-03-11 00:31:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5774 transitions. [2021-03-11 00:31:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:48,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:48,179 INFO L519 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] [2021-03-11 00:31:48,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:48,379 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 55 times [2021-03-11 00:31:48,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:48,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370966358] [2021-03-11 00:31:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:48,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370966358] [2021-03-11 00:31:48,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206987892] [2021-03-11 00:31:48,785 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 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 [2021-03-11 00:31:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:48,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:49,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:49,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:49,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:49,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:31:49,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:49,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:49,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:49,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:31:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:49,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:49,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:31:49,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773575945] [2021-03-11 00:31:49,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:49,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:49,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:49,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:49,173 INFO L87 Difference]: Start difference. First operand 1684 states and 5774 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-03-11 00:31:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:50,165 INFO L93 Difference]: Finished difference Result 2015 states and 6632 transitions. [2021-03-11 00:31:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:31:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 26 [2021-03-11 00:31:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:50,169 INFO L225 Difference]: With dead ends: 2015 [2021-03-11 00:31:50,169 INFO L226 Difference]: Without dead ends: 1993 [2021-03-11 00:31:50,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1115.5ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:31:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-03-11 00:31:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1686. [2021-03-11 00:31:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.430860534124629) internal successors, (5781), 1685 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5781 transitions. [2021-03-11 00:31:50,195 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5781 transitions. Word has length 26 [2021-03-11 00:31:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:50,196 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5781 transitions. [2021-03-11 00:31:50,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-03-11 00:31:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5781 transitions. [2021-03-11 00:31:50,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:50,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:50,198 INFO L519 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] [2021-03-11 00:31:50,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-03-11 00:31:50,400 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:50,401 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 56 times [2021-03-11 00:31:50,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:50,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957550037] [2021-03-11 00:31:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:50,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957550037] [2021-03-11 00:31:50,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695142491] [2021-03-11 00:31:50,891 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 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 [2021-03-11 00:31:50,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:31:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:51,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:51,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:51,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:51,199 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 [2021-03-11 00:31:51,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:51,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:51,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:51,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:31:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:51,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:51,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-03-11 00:31:51,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769129745] [2021-03-11 00:31:51,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:51,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:51,265 INFO L87 Difference]: Start difference. First operand 1686 states and 5781 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:52,436 INFO L93 Difference]: Finished difference Result 2069 states and 6957 transitions. [2021-03-11 00:31:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:31:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 [2021-03-11 00:31:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:52,443 INFO L225 Difference]: With dead ends: 2069 [2021-03-11 00:31:52,443 INFO L226 Difference]: Without dead ends: 2038 [2021-03-11 00:31:52,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1307.7ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:31:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-03-11 00:31:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1692. [2021-03-11 00:31:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-03-11 00:31:52,477 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-03-11 00:31:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:52,477 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-03-11 00:31:52,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-03-11 00:31:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:52,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:52,481 INFO L519 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] [2021-03-11 00:31:52,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-03-11 00:31:52,681 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 57 times [2021-03-11 00:31:52,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:52,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583099273] [2021-03-11 00:31:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:53,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583099273] [2021-03-11 00:31:53,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123171687] [2021-03-11 00:31:53,102 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 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 [2021-03-11 00:31:53,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:31:53,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:53,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:53,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:53,482 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 28 treesize of output 32 [2021-03-11 00:31:53,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:53,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:53,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:53,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:81 [2021-03-11 00:31:53,723 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-11 00:31:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:53,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:53,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:31:53,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064499753] [2021-03-11 00:31:53,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:53,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:53,780 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:54,822 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-11 00:31:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:55,040 INFO L93 Difference]: Finished difference Result 2105 states and 7051 transitions. [2021-03-11 00:31:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:31:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 26 [2021-03-11 00:31:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:55,047 INFO L225 Difference]: With dead ends: 2105 [2021-03-11 00:31:55,047 INFO L226 Difference]: Without dead ends: 2090 [2021-03-11 00:31:55,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1479.3ms TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:31:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-03-11 00:31:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1692. [2021-03-11 00:31:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.4287403903015967) internal successors, (5798), 1691 states have internal predecessors, (5798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5798 transitions. [2021-03-11 00:31:55,081 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5798 transitions. Word has length 26 [2021-03-11 00:31:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:55,081 INFO L480 AbstractCegarLoop]: Abstraction has 1692 states and 5798 transitions. [2021-03-11 00:31:55,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5798 transitions. [2021-03-11 00:31:55,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:55,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:55,084 INFO L519 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] [2021-03-11 00:31:55,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:55,291 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 49 times [2021-03-11 00:31:55,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:55,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534652334] [2021-03-11 00:31:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:55,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534652334] [2021-03-11 00:31:55,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65601025] [2021-03-11 00:31:55,601 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 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 [2021-03-11 00:31:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:31:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:55,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:55,795 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 [2021-03-11 00:31:55,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:31:55,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:55,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:55,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-03-11 00:31:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:55,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:55,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:31:55,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901777095] [2021-03-11 00:31:55,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:31:55,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:55,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:31:55,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:31:55,861 INFO L87 Difference]: Start difference. First operand 1692 states and 5798 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) [2021-03-11 00:31:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:31:57,784 INFO L93 Difference]: Finished difference Result 2382 states and 7859 transitions. [2021-03-11 00:31:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:31:57,784 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 [2021-03-11 00:31:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:31:57,788 INFO L225 Difference]: With dead ends: 2382 [2021-03-11 00:31:57,789 INFO L226 Difference]: Without dead ends: 2367 [2021-03-11 00:31:57,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1388.1ms TimeCoverageRelationStatistics Valid=262, Invalid=1298, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:31:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-03-11 00:31:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1699. [2021-03-11 00:31:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 3.4287396937573615) internal successors, (5822), 1698 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:31:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 5822 transitions. [2021-03-11 00:31:57,814 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 5822 transitions. Word has length 26 [2021-03-11 00:31:57,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:31:57,814 INFO L480 AbstractCegarLoop]: Abstraction has 1699 states and 5822 transitions. [2021-03-11 00:31:57,814 INFO L481 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) [2021-03-11 00:31:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 5822 transitions. [2021-03-11 00:31:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:31:57,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:31:57,816 INFO L519 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] [2021-03-11 00:31:58,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:31:58,017 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:31:58,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:31:58,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 58 times [2021-03-11 00:31:58,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:31:58,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401473030] [2021-03-11 00:31:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:31:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:31:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:58,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401473030] [2021-03-11 00:31:58,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901005409] [2021-03-11 00:31:58,179 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 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 [2021-03-11 00:31:58,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:31:58,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:31:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:31:58,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:31:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:58,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:31:58,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:31:58,593 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 [2021-03-11 00:31:58,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:31:58,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:31:58,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:31:58,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-03-11 00:31:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:31:58,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:31:58,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:31:58,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696465919] [2021-03-11 00:31:58,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:31:58,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:31:58,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:31:58,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:31:58,650 INFO L87 Difference]: Start difference. First operand 1699 states and 5822 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) [2021-03-11 00:32:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:01,061 INFO L93 Difference]: Finished difference Result 2569 states and 8218 transitions. [2021-03-11 00:32:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:32:01,063 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 [2021-03-11 00:32:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:01,069 INFO L225 Difference]: With dead ends: 2569 [2021-03-11 00:32:01,069 INFO L226 Difference]: Without dead ends: 2547 [2021-03-11 00:32:01,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1664.5ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:32:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-03-11 00:32:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 1746. [2021-03-11 00:32:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.428080229226361) internal successors, (5982), 1745 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5982 transitions. [2021-03-11 00:32:01,110 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5982 transitions. Word has length 26 [2021-03-11 00:32:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:01,110 INFO L480 AbstractCegarLoop]: Abstraction has 1746 states and 5982 transitions. [2021-03-11 00:32:01,111 INFO L481 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) [2021-03-11 00:32:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5982 transitions. [2021-03-11 00:32:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:01,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:01,114 INFO L519 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] [2021-03-11 00:32:01,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:01,334 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:01,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 59 times [2021-03-11 00:32:01,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:01,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134566059] [2021-03-11 00:32:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134566059] [2021-03-11 00:32:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756980328] [2021-03-11 00:32:01,655 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 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 [2021-03-11 00:32:01,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:32:01,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:01,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:32:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:02,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:02,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:32:02,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:32:02,007 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 [2021-03-11 00:32:02,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:02,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:02,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:02,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-03-11 00:32:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:02,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:02,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:32:02,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149437919] [2021-03-11 00:32:02,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:02,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:02,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:02,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:02,077 INFO L87 Difference]: Start difference. First operand 1746 states and 5982 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) [2021-03-11 00:32:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:04,136 INFO L93 Difference]: Finished difference Result 3031 states and 9775 transitions. [2021-03-11 00:32:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:32:04,137 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 [2021-03-11 00:32:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:04,143 INFO L225 Difference]: With dead ends: 3031 [2021-03-11 00:32:04,143 INFO L226 Difference]: Without dead ends: 3001 [2021-03-11 00:32:04,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1571.6ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:32:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-03-11 00:32:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1808. [2021-03-11 00:32:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 3.4305478693967904) internal successors, (6199), 1807 states have internal predecessors, (6199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 6199 transitions. [2021-03-11 00:32:04,174 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 6199 transitions. Word has length 26 [2021-03-11 00:32:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:04,174 INFO L480 AbstractCegarLoop]: Abstraction has 1808 states and 6199 transitions. [2021-03-11 00:32:04,174 INFO L481 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) [2021-03-11 00:32:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 6199 transitions. [2021-03-11 00:32:04,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:04,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:04,177 INFO L519 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] [2021-03-11 00:32:04,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:04,389 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:04,389 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 60 times [2021-03-11 00:32:04,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:04,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586716955] [2021-03-11 00:32:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586716955] [2021-03-11 00:32:04,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678967352] [2021-03-11 00:32:04,586 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 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 [2021-03-11 00:32:04,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:32:04,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:04,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:32:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:04,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:04,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:04,833 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 [2021-03-11 00:32:04,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:32:05,068 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-03-11 00:32:05,068 INFO L628 ElimStorePlain]: treesize reduction 95, result has 45.4 percent of original size [2021-03-11 00:32:05,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:05,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:325 [2021-03-11 00:32:05,275 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:32:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:05,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:05,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:32:05,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898256358] [2021-03-11 00:32:05,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:32:05,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:05,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:32:05,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:32:05,400 INFO L87 Difference]: Start difference. First operand 1808 states and 6199 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) [2021-03-11 00:32:06,820 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-03-11 00:32:07,363 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-11 00:32:07,767 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-11 00:32:08,306 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-03-11 00:32:08,597 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-03-11 00:32:09,022 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-11 00:32:09,362 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-11 00:32:09,557 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-11 00:32:09,883 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-03-11 00:32:10,194 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-03-11 00:32:10,723 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-03-11 00:32:10,995 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-11 00:32:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:11,276 INFO L93 Difference]: Finished difference Result 3468 states and 10976 transitions. [2021-03-11 00:32:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:32:11,278 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 [2021-03-11 00:32:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:11,287 INFO L225 Difference]: With dead ends: 3468 [2021-03-11 00:32:11,287 INFO L226 Difference]: Without dead ends: 3395 [2021-03-11 00:32:11,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 4757.0ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:32:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-03-11 00:32:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 1827. [2021-03-11 00:32:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.4342825848849947) internal successors, (6271), 1826 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6271 transitions. [2021-03-11 00:32:11,338 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6271 transitions. Word has length 26 [2021-03-11 00:32:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:11,338 INFO L480 AbstractCegarLoop]: Abstraction has 1827 states and 6271 transitions. [2021-03-11 00:32:11,338 INFO L481 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) [2021-03-11 00:32:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6271 transitions. [2021-03-11 00:32:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:11,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:11,342 INFO L519 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] [2021-03-11 00:32:11,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:11,543 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 50 times [2021-03-11 00:32:11,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:11,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195096816] [2021-03-11 00:32:11,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:11,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195096816] [2021-03-11 00:32:11,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529323398] [2021-03-11 00:32:11,938 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 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 [2021-03-11 00:32:11,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:32:11,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:12,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:12,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:12,348 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 [2021-03-11 00:32:12,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:12,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:12,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:12,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-03-11 00:32:12,510 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:32:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:12,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:12,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:32:12,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058991132] [2021-03-11 00:32:12,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:32:12,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:32:12,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:32:12,596 INFO L87 Difference]: Start difference. First operand 1827 states and 6271 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) [2021-03-11 00:32:14,547 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-11 00:32:14,975 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-03-11 00:32:15,448 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-11 00:32:15,697 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-03-11 00:32:16,225 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:32:16,486 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-11 00:32:16,768 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-11 00:32:17,124 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-11 00:32:17,395 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-03-11 00:32:17,713 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:32:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:17,851 INFO L93 Difference]: Finished difference Result 2596 states and 8537 transitions. [2021-03-11 00:32:17,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:32:17,854 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 [2021-03-11 00:32:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:17,860 INFO L225 Difference]: With dead ends: 2596 [2021-03-11 00:32:17,860 INFO L226 Difference]: Without dead ends: 2581 [2021-03-11 00:32:17,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 4061.0ms TimeCoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:32:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2021-03-11 00:32:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 1845. [2021-03-11 00:32:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 3.4322125813449023) internal successors, (6329), 1844 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 6329 transitions. [2021-03-11 00:32:17,903 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 6329 transitions. Word has length 26 [2021-03-11 00:32:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:17,903 INFO L480 AbstractCegarLoop]: Abstraction has 1845 states and 6329 transitions. [2021-03-11 00:32:17,903 INFO L481 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) [2021-03-11 00:32:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 6329 transitions. [2021-03-11 00:32:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:17,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:17,907 INFO L519 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] [2021-03-11 00:32:18,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:18,107 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash 294836038, now seen corresponding path program 51 times [2021-03-11 00:32:18,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:18,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443226157] [2021-03-11 00:32:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:18,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443226157] [2021-03-11 00:32:18,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047720303] [2021-03-11 00:32:18,461 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 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 [2021-03-11 00:32:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:32:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-11 00:32:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:18,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:18,873 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 [2021-03-11 00:32:18,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:18,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:18,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:18,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:77 [2021-03-11 00:32:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:19,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:19,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:32:19,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033458656] [2021-03-11 00:32:19,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:32:19,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:32:19,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:32:19,216 INFO L87 Difference]: Start difference. First operand 1845 states and 6329 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) [2021-03-11 00:32:19,737 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-11 00:32:22,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:22,028 INFO L93 Difference]: Finished difference Result 2945 states and 9563 transitions. [2021-03-11 00:32:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:32:22,029 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 [2021-03-11 00:32:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:22,034 INFO L225 Difference]: With dead ends: 2945 [2021-03-11 00:32:22,034 INFO L226 Difference]: Without dead ends: 2930 [2021-03-11 00:32:22,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2510.1ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:32:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-03-11 00:32:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 1841. [2021-03-11 00:32:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 3.429891304347826) internal successors, (6311), 1840 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 6311 transitions. [2021-03-11 00:32:22,064 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 6311 transitions. Word has length 26 [2021-03-11 00:32:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:22,064 INFO L480 AbstractCegarLoop]: Abstraction has 1841 states and 6311 transitions. [2021-03-11 00:32:22,064 INFO L481 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) [2021-03-11 00:32:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 6311 transitions. [2021-03-11 00:32:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:22,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:22,067 INFO L519 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] [2021-03-11 00:32:22,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-03-11 00:32:22,267 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:22,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 52 times [2021-03-11 00:32:22,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:22,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323879203] [2021-03-11 00:32:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:22,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323879203] [2021-03-11 00:32:22,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133364444] [2021-03-11 00:32:22,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:32:22,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:32:22,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:32:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:22,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:22,995 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 [2021-03-11 00:32:22,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:32:23,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:23,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:23,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-03-11 00:32:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:23,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:23,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:32:23,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131704317] [2021-03-11 00:32:23,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:32:23,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:23,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:32:23,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:32:23,166 INFO L87 Difference]: Start difference. First operand 1841 states and 6311 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) [2021-03-11 00:32:23,893 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:32:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:25,478 INFO L93 Difference]: Finished difference Result 2554 states and 8486 transitions. [2021-03-11 00:32:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:32:25,480 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 [2021-03-11 00:32:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:25,487 INFO L225 Difference]: With dead ends: 2554 [2021-03-11 00:32:25,487 INFO L226 Difference]: Without dead ends: 2529 [2021-03-11 00:32:25,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1538.5ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:32:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-03-11 00:32:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1829. [2021-03-11 00:32:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.4343544857768054) internal successors, (6278), 1828 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6278 transitions. [2021-03-11 00:32:25,525 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6278 transitions. Word has length 26 [2021-03-11 00:32:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:25,525 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6278 transitions. [2021-03-11 00:32:25,526 INFO L481 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) [2021-03-11 00:32:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6278 transitions. [2021-03-11 00:32:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:25,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:25,529 INFO L519 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] [2021-03-11 00:32:25,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-03-11 00:32:25,730 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:25,730 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 61 times [2021-03-11 00:32:25,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:25,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034846231] [2021-03-11 00:32:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:26,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034846231] [2021-03-11 00:32:26,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574628425] [2021-03-11 00:32:26,173 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 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 [2021-03-11 00:32:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:26,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:32:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:26,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:32:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:26,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:32:26,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-03-11 00:32:26,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:26,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:26,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:26,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-03-11 00:32:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:26,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:26,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:32:26,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469878522] [2021-03-11 00:32:26,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:32:26,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:26,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:32:26,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:32:26,706 INFO L87 Difference]: Start difference. First operand 1829 states and 6278 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) [2021-03-11 00:32:27,142 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:32:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:29,047 INFO L93 Difference]: Finished difference Result 2460 states and 8152 transitions. [2021-03-11 00:32:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:32:29,048 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 [2021-03-11 00:32:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:29,052 INFO L225 Difference]: With dead ends: 2460 [2021-03-11 00:32:29,052 INFO L226 Difference]: Without dead ends: 2438 [2021-03-11 00:32:29,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1986.6ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:32:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-03-11 00:32:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1826. [2021-03-11 00:32:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.433972602739726) internal successors, (6267), 1825 states have internal predecessors, (6267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6267 transitions. [2021-03-11 00:32:29,078 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6267 transitions. Word has length 26 [2021-03-11 00:32:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:29,078 INFO L480 AbstractCegarLoop]: Abstraction has 1826 states and 6267 transitions. [2021-03-11 00:32:29,078 INFO L481 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) [2021-03-11 00:32:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6267 transitions. [2021-03-11 00:32:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:29,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:29,081 INFO L519 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] [2021-03-11 00:32:29,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-03-11 00:32:29,282 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:29,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1861203518, now seen corresponding path program 62 times [2021-03-11 00:32:29,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:29,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052080037] [2021-03-11 00:32:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:29,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052080037] [2021-03-11 00:32:29,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143656175] [2021-03-11 00:32:29,511 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 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 [2021-03-11 00:32:29,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:29,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:29,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:32:29,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:29,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:32:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:29,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:32:29,760 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 [2021-03-11 00:32:29,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:29,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:29,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:29,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-03-11 00:32:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:29,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:29,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:32:29,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118410768] [2021-03-11 00:32:29,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:32:29,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:32:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:32:29,801 INFO L87 Difference]: Start difference. First operand 1826 states and 6267 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) 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) [2021-03-11 00:32:31,505 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-11 00:32:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:31,820 INFO L93 Difference]: Finished difference Result 2532 states and 8399 transitions. [2021-03-11 00:32:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:32:31,823 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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 26 [2021-03-11 00:32:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:31,829 INFO L225 Difference]: With dead ends: 2532 [2021-03-11 00:32:31,829 INFO L226 Difference]: Without dead ends: 2513 [2021-03-11 00:32:31,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1643.1ms TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:32:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-03-11 00:32:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1829. [2021-03-11 00:32:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 3.435995623632385) internal successors, (6281), 1828 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 6281 transitions. [2021-03-11 00:32:31,869 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 6281 transitions. Word has length 26 [2021-03-11 00:32:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:31,869 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 6281 transitions. [2021-03-11 00:32:31,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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) [2021-03-11 00:32:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 6281 transitions. [2021-03-11 00:32:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:31,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:31,873 INFO L519 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] [2021-03-11 00:32:32,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:32,073 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:32,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1211067586, now seen corresponding path program 63 times [2021-03-11 00:32:32,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:32,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936849466] [2021-03-11 00:32:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936849466] [2021-03-11 00:32:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95244848] [2021-03-11 00:32:32,585 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 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 [2021-03-11 00:32:32,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:32:32,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:32:32,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:32,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:32,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:32,960 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 [2021-03-11 00:32:32,975 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:32:33,033 INFO L628 ElimStorePlain]: treesize reduction 17, result has 55.3 percent of original size [2021-03-11 00:32:33,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:33,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:32:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:33,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:33,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:32:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057010765] [2021-03-11 00:32:33,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:33,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:33,179 INFO L87 Difference]: Start difference. First operand 1829 states and 6281 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) [2021-03-11 00:32:33,556 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:32:34,103 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-11 00:32:34,729 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-11 00:32:34,920 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-11 00:32:35,190 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-03-11 00:32:35,360 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:32:36,010 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-03-11 00:32:36,447 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-03-11 00:32:36,744 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:32:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:36,885 INFO L93 Difference]: Finished difference Result 2965 states and 9658 transitions. [2021-03-11 00:32:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:32:36,886 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 [2021-03-11 00:32:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:36,891 INFO L225 Difference]: With dead ends: 2965 [2021-03-11 00:32:36,891 INFO L226 Difference]: Without dead ends: 2921 [2021-03-11 00:32:36,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3345.1ms TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:32:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-03-11 00:32:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1870. [2021-03-11 00:32:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.431246655965757) internal successors, (6413), 1869 states have internal predecessors, (6413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6413 transitions. [2021-03-11 00:32:36,924 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6413 transitions. Word has length 26 [2021-03-11 00:32:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:36,924 INFO L480 AbstractCegarLoop]: Abstraction has 1870 states and 6413 transitions. [2021-03-11 00:32:36,924 INFO L481 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) [2021-03-11 00:32:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6413 transitions. [2021-03-11 00:32:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:36,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:36,926 INFO L519 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] [2021-03-11 00:32:37,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-03-11 00:32:37,127 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:37,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671286, now seen corresponding path program 53 times [2021-03-11 00:32:37,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:37,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35521577] [2021-03-11 00:32:37,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:37,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35521577] [2021-03-11 00:32:37,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062727043] [2021-03-11 00:32:37,310 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 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 [2021-03-11 00:32:37,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:32:37,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:37,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:32:37,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:37,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:32:37,645 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 [2021-03-11 00:32:37,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:37,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:37,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:37,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-03-11 00:32:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:37,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:37,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:32:37,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027501972] [2021-03-11 00:32:37,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:32:37,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:32:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:32:37,684 INFO L87 Difference]: Start difference. First operand 1870 states and 6413 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:32:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:38,663 INFO L93 Difference]: Finished difference Result 2376 states and 7962 transitions. [2021-03-11 00:32:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:32:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 [2021-03-11 00:32:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:38,668 INFO L225 Difference]: With dead ends: 2376 [2021-03-11 00:32:38,668 INFO L226 Difference]: Without dead ends: 2361 [2021-03-11 00:32:38,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 773.2ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:32:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-03-11 00:32:38,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1867. [2021-03-11 00:32:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.4260450160771705) internal successors, (6393), 1866 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6393 transitions. [2021-03-11 00:32:38,691 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6393 transitions. Word has length 26 [2021-03-11 00:32:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:38,691 INFO L480 AbstractCegarLoop]: Abstraction has 1867 states and 6393 transitions. [2021-03-11 00:32:38,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) [2021-03-11 00:32:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6393 transitions. [2021-03-11 00:32:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:38,693 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:38,693 INFO L519 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] [2021-03-11 00:32:38,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:38,894 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:38,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 54 times [2021-03-11 00:32:38,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:38,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491237136] [2021-03-11 00:32:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491237136] [2021-03-11 00:32:39,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235871007] [2021-03-11 00:32:39,078 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 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 [2021-03-11 00:32:39,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:32:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:32:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:39,368 INFO L354 Elim1Store]: treesize reduction 35, result has 36.4 percent of original size [2021-03-11 00:32:39,368 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 76 treesize of output 67 [2021-03-11 00:32:39,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:39,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:39,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:39,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:35 [2021-03-11 00:32:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:39,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:39,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:32:39,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071774174] [2021-03-11 00:32:39,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:32:39,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:32:39,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:32:39,652 INFO L87 Difference]: Start difference. First operand 1867 states and 6393 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) [2021-03-11 00:32:39,999 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-03-11 00:32:40,654 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-11 00:32:40,877 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:32:41,623 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-03-11 00:32:42,566 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-11 00:32:42,790 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-11 00:32:43,092 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:32:43,448 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-11 00:32:43,694 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:32:44,313 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:32:45,313 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:32:45,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:45,606 INFO L93 Difference]: Finished difference Result 2818 states and 9211 transitions. [2021-03-11 00:32:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:32:45,608 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 [2021-03-11 00:32:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:45,614 INFO L225 Difference]: With dead ends: 2818 [2021-03-11 00:32:45,614 INFO L226 Difference]: Without dead ends: 2753 [2021-03-11 00:32:45,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 3827.3ms TimeCoverageRelationStatistics Valid=355, Invalid=1901, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:32:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-03-11 00:32:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 1890. [2021-03-11 00:32:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4187400741132876) internal successors, (6458), 1889 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6458 transitions. [2021-03-11 00:32:45,649 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6458 transitions. Word has length 26 [2021-03-11 00:32:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:45,649 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6458 transitions. [2021-03-11 00:32:45,649 INFO L481 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) [2021-03-11 00:32:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6458 transitions. [2021-03-11 00:32:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:45,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:45,653 INFO L519 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] [2021-03-11 00:32:45,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-03-11 00:32:45,854 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -322804878, now seen corresponding path program 55 times [2021-03-11 00:32:45,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:45,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757258877] [2021-03-11 00:32:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:46,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757258877] [2021-03-11 00:32:46,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949365697] [2021-03-11 00:32:46,247 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 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 [2021-03-11 00:32:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:46,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:32:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:46,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:46,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:46,640 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 [2021-03-11 00:32:46,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-11 00:32:46,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:46,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:46,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-03-11 00:32:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:46,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:46,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:32:46,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692005232] [2021-03-11 00:32:46,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:32:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:46,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:32:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:32:46,772 INFO L87 Difference]: Start difference. First operand 1890 states and 6458 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) [2021-03-11 00:32:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:48,353 INFO L93 Difference]: Finished difference Result 2691 states and 8967 transitions. [2021-03-11 00:32:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:32:48,354 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 [2021-03-11 00:32:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:48,358 INFO L225 Difference]: With dead ends: 2691 [2021-03-11 00:32:48,358 INFO L226 Difference]: Without dead ends: 2676 [2021-03-11 00:32:48,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1533.5ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:32:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-03-11 00:32:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1879. [2021-03-11 00:32:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-03-11 00:32:48,384 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-03-11 00:32:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:48,384 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-03-11 00:32:48,384 INFO L481 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) [2021-03-11 00:32:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-03-11 00:32:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:48,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:48,386 INFO L519 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] [2021-03-11 00:32:48,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-03-11 00:32:48,587 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:48,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:48,587 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 56 times [2021-03-11 00:32:48,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:48,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499495003] [2021-03-11 00:32:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:48,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499495003] [2021-03-11 00:32:48,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521987168] [2021-03-11 00:32:48,771 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 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 [2021-03-11 00:32:48,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:32:48,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:32:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:49,012 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-03-11 00:32:49,012 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 [2021-03-11 00:32:49,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:32:49,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:49,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:49,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-03-11 00:32:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:49,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:49,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-11 00:32:49,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645943073] [2021-03-11 00:32:49,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:32:49,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:49,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:32:49,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:32:49,105 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 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) [2021-03-11 00:32:50,219 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-11 00:32:50,659 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-11 00:32:51,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:51,378 INFO L93 Difference]: Finished difference Result 2580 states and 8592 transitions. [2021-03-11 00:32:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:32:51,380 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 [2021-03-11 00:32:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:51,386 INFO L225 Difference]: With dead ends: 2580 [2021-03-11 00:32:51,386 INFO L226 Difference]: Without dead ends: 2544 [2021-03-11 00:32:51,386 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1432.3ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:32:51,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-03-11 00:32:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1879. [2021-03-11 00:32:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-03-11 00:32:51,425 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-03-11 00:32:51,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:51,425 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-03-11 00:32:51,425 INFO L481 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) [2021-03-11 00:32:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-03-11 00:32:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:51,429 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:51,429 INFO L519 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] [2021-03-11 00:32:51,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-03-11 00:32:51,631 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:51,631 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 64 times [2021-03-11 00:32:51,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:51,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815123659] [2021-03-11 00:32:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:52,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815123659] [2021-03-11 00:32:52,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699734045] [2021-03-11 00:32:52,274 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 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 [2021-03-11 00:32:52,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:32:52,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:32:52,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:52,820 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-03-11 00:32:52,820 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 56 [2021-03-11 00:32:52,828 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:52,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:52,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:52,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:10 [2021-03-11 00:32:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:52,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:52,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:32:52,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744744670] [2021-03-11 00:32:52,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:32:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:32:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:32:52,919 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 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) [2021-03-11 00:32:53,498 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-11 00:32:53,644 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-03-11 00:32:54,036 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-11 00:32:54,414 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-11 00:32:54,781 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-11 00:32:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:55,877 INFO L93 Difference]: Finished difference Result 2397 states and 7991 transitions. [2021-03-11 00:32:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:32:55,878 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 [2021-03-11 00:32:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:55,883 INFO L225 Difference]: With dead ends: 2397 [2021-03-11 00:32:55,883 INFO L226 Difference]: Without dead ends: 2382 [2021-03-11 00:32:55,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 2748.0ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:32:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-03-11 00:32:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1879. [2021-03-11 00:32:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4222577209797658) internal successors, (6427), 1878 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6427 transitions. [2021-03-11 00:32:55,913 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6427 transitions. Word has length 26 [2021-03-11 00:32:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:55,913 INFO L480 AbstractCegarLoop]: Abstraction has 1879 states and 6427 transitions. [2021-03-11 00:32:55,913 INFO L481 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) [2021-03-11 00:32:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6427 transitions. [2021-03-11 00:32:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:32:55,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:55,916 INFO L519 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] [2021-03-11 00:32:56,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:56,117 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -63112514, now seen corresponding path program 65 times [2021-03-11 00:32:56,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:56,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249473311] [2021-03-11 00:32:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:56,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249473311] [2021-03-11 00:32:56,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22113758] [2021-03-11 00:32:56,342 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 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 [2021-03-11 00:32:56,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:32:56,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:56,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:32:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:56,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:32:56,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:32:56,559 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 [2021-03-11 00:32:56,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-11 00:32:56,599 INFO L628 ElimStorePlain]: treesize reduction 24, result has 46.7 percent of original size [2021-03-11 00:32:56,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:32:56,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-03-11 00:32:56,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:56,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:56,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:32:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347371352] [2021-03-11 00:32:56,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:56,680 INFO L87 Difference]: Start difference. First operand 1879 states and 6427 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) [2021-03-11 00:32:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:32:57,910 INFO L93 Difference]: Finished difference Result 2617 states and 8669 transitions. [2021-03-11 00:32:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:32:57,911 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 [2021-03-11 00:32:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:32:57,915 INFO L225 Difference]: With dead ends: 2617 [2021-03-11 00:32:57,915 INFO L226 Difference]: Without dead ends: 2587 [2021-03-11 00:32:57,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 988.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:32:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-03-11 00:32:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1866. [2021-03-11 00:32:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4176943699731903) internal successors, (6374), 1865 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:32:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6374 transitions. [2021-03-11 00:32:57,940 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6374 transitions. Word has length 26 [2021-03-11 00:32:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:32:57,940 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 6374 transitions. [2021-03-11 00:32:57,940 INFO L481 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) [2021-03-11 00:32:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6374 transitions. [2021-03-11 00:32:57,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:32:57,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:32:57,942 INFO L519 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] [2021-03-11 00:32:58,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:32:58,143 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:32:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:32:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 57 times [2021-03-11 00:32:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:32:58,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393935685] [2021-03-11 00:32:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:32:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:32:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:58,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393935685] [2021-03-11 00:32:58,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966307449] [2021-03-11 00:32:58,197 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 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 [2021-03-11 00:32:58,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:32:58,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:32:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:32:58,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:32:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:32:58,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:32:58,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:32:58,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017696812] [2021-03-11 00:32:58,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:32:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:32:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:32:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:32:58,392 INFO L87 Difference]: Start difference. First operand 1866 states and 6374 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) [2021-03-11 00:33:01,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:01,356 INFO L93 Difference]: Finished difference Result 4807 states and 14882 transitions. [2021-03-11 00:33:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:33:01,358 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 [2021-03-11 00:33:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:01,370 INFO L225 Difference]: With dead ends: 4807 [2021-03-11 00:33:01,370 INFO L226 Difference]: Without dead ends: 4807 [2021-03-11 00:33:01,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1565.3ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:33:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-03-11 00:33:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2064. [2021-03-11 00:33:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4755210857973826) internal successors, (7170), 2063 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7170 transitions. [2021-03-11 00:33:01,435 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7170 transitions. Word has length 28 [2021-03-11 00:33:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:01,435 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 7170 transitions. [2021-03-11 00:33:01,435 INFO L481 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) [2021-03-11 00:33:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7170 transitions. [2021-03-11 00:33:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:01,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:01,439 INFO L519 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] [2021-03-11 00:33:01,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:01,659 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 58 times [2021-03-11 00:33:01,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:01,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834208894] [2021-03-11 00:33:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834208894] [2021-03-11 00:33:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367125825] [2021-03-11 00:33:01,795 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:33:01,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:33:01,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:02,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:02,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:33:02,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738867366] [2021-03-11 00:33:02,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:33:02,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:33:02,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:33:02,033 INFO L87 Difference]: Start difference. First operand 2064 states and 7170 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) [2021-03-11 00:33:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:04,314 INFO L93 Difference]: Finished difference Result 6392 states and 19484 transitions. [2021-03-11 00:33:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:33:04,315 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 [2021-03-11 00:33:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:04,326 INFO L225 Difference]: With dead ends: 6392 [2021-03-11 00:33:04,326 INFO L226 Difference]: Without dead ends: 6392 [2021-03-11 00:33:04,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1395.2ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-03-11 00:33:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6392 states. [2021-03-11 00:33:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6392 to 2078. [2021-03-11 00:33:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.4848338950409246) internal successors, (7238), 2077 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 7238 transitions. [2021-03-11 00:33:04,387 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 7238 transitions. Word has length 28 [2021-03-11 00:33:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:04,387 INFO L480 AbstractCegarLoop]: Abstraction has 2078 states and 7238 transitions. [2021-03-11 00:33:04,388 INFO L481 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) [2021-03-11 00:33:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 7238 transitions. [2021-03-11 00:33:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:04,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:04,390 INFO L519 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] [2021-03-11 00:33:04,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-03-11 00:33:04,591 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 59 times [2021-03-11 00:33:04,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:04,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591922432] [2021-03-11 00:33:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591922432] [2021-03-11 00:33:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177146748] [2021-03-11 00:33:04,657 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 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 [2021-03-11 00:33:04,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:33:04,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:04,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:04,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:33:04,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022429545] [2021-03-11 00:33:04,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:33:04,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:33:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:33:04,855 INFO L87 Difference]: Start difference. First operand 2078 states and 7238 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) [2021-03-11 00:33:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:08,420 INFO L93 Difference]: Finished difference Result 5781 states and 18006 transitions. [2021-03-11 00:33:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-11 00:33:08,422 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 [2021-03-11 00:33:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:08,436 INFO L225 Difference]: With dead ends: 5781 [2021-03-11 00:33:08,436 INFO L226 Difference]: Without dead ends: 5781 [2021-03-11 00:33:08,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1936.4ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-03-11 00:33:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-03-11 00:33:08,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 2023. [2021-03-11 00:33:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.4579624134520275) internal successors, (6992), 2022 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6992 transitions. [2021-03-11 00:33:08,496 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6992 transitions. Word has length 28 [2021-03-11 00:33:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:08,496 INFO L480 AbstractCegarLoop]: Abstraction has 2023 states and 6992 transitions. [2021-03-11 00:33:08,496 INFO L481 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) [2021-03-11 00:33:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6992 transitions. [2021-03-11 00:33:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:08,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:08,499 INFO L519 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] [2021-03-11 00:33:08,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:08,700 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:08,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 60 times [2021-03-11 00:33:08,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:08,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252635620] [2021-03-11 00:33:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:08,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252635620] [2021-03-11 00:33:08,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468704669] [2021-03-11 00:33:08,825 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 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 [2021-03-11 00:33:08,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:33:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:08,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:09,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:09,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:33:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644121983] [2021-03-11 00:33:09,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:33:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:33:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:33:09,124 INFO L87 Difference]: Start difference. First operand 2023 states and 6992 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) [2021-03-11 00:33:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:10,828 INFO L93 Difference]: Finished difference Result 4893 states and 15049 transitions. [2021-03-11 00:33:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:33:10,829 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 [2021-03-11 00:33:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:10,837 INFO L225 Difference]: With dead ends: 4893 [2021-03-11 00:33:10,837 INFO L226 Difference]: Without dead ends: 4893 [2021-03-11 00:33:10,838 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 1146.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:33:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-03-11 00:33:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 2033. [2021-03-11 00:33:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.453740157480315) internal successors, (7018), 2032 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7018 transitions. [2021-03-11 00:33:10,898 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7018 transitions. Word has length 28 [2021-03-11 00:33:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:10,898 INFO L480 AbstractCegarLoop]: Abstraction has 2033 states and 7018 transitions. [2021-03-11 00:33:10,898 INFO L481 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) [2021-03-11 00:33:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7018 transitions. [2021-03-11 00:33:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:10,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:10,902 INFO L519 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] [2021-03-11 00:33:11,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:11,103 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:11,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:11,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 66 times [2021-03-11 00:33:11,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:11,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56270993] [2021-03-11 00:33:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:11,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56270993] [2021-03-11 00:33:11,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654434308] [2021-03-11 00:33:11,182 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 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 [2021-03-11 00:33:11,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:33:11,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:11,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:11,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:11,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:11,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:33:11,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442821472] [2021-03-11 00:33:11,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:11,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:11,355 INFO L87 Difference]: Start difference. First operand 2033 states and 7018 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) [2021-03-11 00:33:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:13,304 INFO L93 Difference]: Finished difference Result 4312 states and 13444 transitions. [2021-03-11 00:33:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:33:13,304 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 [2021-03-11 00:33:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:13,314 INFO L225 Difference]: With dead ends: 4312 [2021-03-11 00:33:13,314 INFO L226 Difference]: Without dead ends: 4312 [2021-03-11 00:33:13,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:33:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-03-11 00:33:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2089. [2021-03-11 00:33:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.439176245210728) internal successors, (7181), 2088 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7181 transitions. [2021-03-11 00:33:13,374 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7181 transitions. Word has length 28 [2021-03-11 00:33:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:13,374 INFO L480 AbstractCegarLoop]: Abstraction has 2089 states and 7181 transitions. [2021-03-11 00:33:13,374 INFO L481 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) [2021-03-11 00:33:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7181 transitions. [2021-03-11 00:33:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:13,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:13,378 INFO L519 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] [2021-03-11 00:33:13,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:13,589 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 61 times [2021-03-11 00:33:13,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:13,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303830773] [2021-03-11 00:33:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:13,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303830773] [2021-03-11 00:33:13,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035799915] [2021-03-11 00:33:13,674 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 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 [2021-03-11 00:33:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:33:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:13,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:13,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:33:13,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519636359] [2021-03-11 00:33:13,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:33:13,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:13,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:33:13,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:33:13,937 INFO L87 Difference]: Start difference. First operand 2089 states and 7181 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:14,463 INFO L93 Difference]: Finished difference Result 3577 states and 11658 transitions. [2021-03-11 00:33:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:33:14,465 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 [2021-03-11 00:33:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:14,473 INFO L225 Difference]: With dead ends: 3577 [2021-03-11 00:33:14,474 INFO L226 Difference]: Without dead ends: 3553 [2021-03-11 00:33:14,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:33:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-03-11 00:33:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2470. [2021-03-11 00:33:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5107330903199676) internal successors, (8668), 2469 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8668 transitions. [2021-03-11 00:33:14,527 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8668 transitions. Word has length 28 [2021-03-11 00:33:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:14,527 INFO L480 AbstractCegarLoop]: Abstraction has 2470 states and 8668 transitions. [2021-03-11 00:33:14,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:14,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8668 transitions. [2021-03-11 00:33:14,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:14,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:14,532 INFO L519 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] [2021-03-11 00:33:14,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:14,732 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 62 times [2021-03-11 00:33:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:14,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15846502] [2021-03-11 00:33:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15846502] [2021-03-11 00:33:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710973680] [2021-03-11 00:33:14,792 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 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 [2021-03-11 00:33:14,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:33:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:14,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:14,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:33:14,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269877837] [2021-03-11 00:33:14,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:33:14,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:33:14,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:33:14,983 INFO L87 Difference]: Start difference. First operand 2470 states and 8668 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) [2021-03-11 00:33:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:15,974 INFO L93 Difference]: Finished difference Result 4198 states and 13424 transitions. [2021-03-11 00:33:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:33:15,975 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 [2021-03-11 00:33:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:15,982 INFO L225 Difference]: With dead ends: 4198 [2021-03-11 00:33:15,982 INFO L226 Difference]: Without dead ends: 4151 [2021-03-11 00:33:15,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:33:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-03-11 00:33:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 2635. [2021-03-11 00:33:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.5292331055429007) internal successors, (9296), 2634 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9296 transitions. [2021-03-11 00:33:16,024 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9296 transitions. Word has length 28 [2021-03-11 00:33:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:16,025 INFO L480 AbstractCegarLoop]: Abstraction has 2635 states and 9296 transitions. [2021-03-11 00:33:16,025 INFO L481 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) [2021-03-11 00:33:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9296 transitions. [2021-03-11 00:33:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:16,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:16,028 INFO L519 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] [2021-03-11 00:33:16,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-03-11 00:33:16,228 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 67 times [2021-03-11 00:33:16,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:16,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312312895] [2021-03-11 00:33:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312312895] [2021-03-11 00:33:16,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417417449] [2021-03-11 00:33:16,312 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 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 [2021-03-11 00:33:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:16,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:16,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-11 00:33:16,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270236178] [2021-03-11 00:33:16,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:33:16,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:33:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:33:16,514 INFO L87 Difference]: Start difference. First operand 2635 states and 9296 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) [2021-03-11 00:33:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:17,235 INFO L93 Difference]: Finished difference Result 5078 states and 16878 transitions. [2021-03-11 00:33:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:33:17,238 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 [2021-03-11 00:33:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:17,252 INFO L225 Difference]: With dead ends: 5078 [2021-03-11 00:33:17,252 INFO L226 Difference]: Without dead ends: 4991 [2021-03-11 00:33:17,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:33:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-03-11 00:33:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 3295. [2021-03-11 00:33:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.5491803278688523) internal successors, (11691), 3294 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11691 transitions. [2021-03-11 00:33:17,356 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11691 transitions. Word has length 28 [2021-03-11 00:33:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:17,356 INFO L480 AbstractCegarLoop]: Abstraction has 3295 states and 11691 transitions. [2021-03-11 00:33:17,356 INFO L481 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) [2021-03-11 00:33:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11691 transitions. [2021-03-11 00:33:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:17,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:17,362 INFO L519 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] [2021-03-11 00:33:17,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-03-11 00:33:17,576 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:17,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 63 times [2021-03-11 00:33:17,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:17,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55501261] [2021-03-11 00:33:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:17,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55501261] [2021-03-11 00:33:17,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781220455] [2021-03-11 00:33:17,683 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 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 [2021-03-11 00:33:17,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:33:17,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:17,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:18,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:18,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:33:18,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225497146] [2021-03-11 00:33:18,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:18,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:18,059 INFO L87 Difference]: Start difference. First operand 3295 states and 11691 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) [2021-03-11 00:33:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:20,173 INFO L93 Difference]: Finished difference Result 5501 states and 17502 transitions. [2021-03-11 00:33:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:33:20,174 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 [2021-03-11 00:33:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:20,203 INFO L225 Difference]: With dead ends: 5501 [2021-03-11 00:33:20,204 INFO L226 Difference]: Without dead ends: 5475 [2021-03-11 00:33:20,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1399.4ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:33:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2021-03-11 00:33:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 3313. [2021-03-11 00:33:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 3.5543478260869565) internal successors, (11772), 3312 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 11772 transitions. [2021-03-11 00:33:20,263 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 11772 transitions. Word has length 28 [2021-03-11 00:33:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:20,263 INFO L480 AbstractCegarLoop]: Abstraction has 3313 states and 11772 transitions. [2021-03-11 00:33:20,263 INFO L481 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) [2021-03-11 00:33:20,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 11772 transitions. [2021-03-11 00:33:20,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:20,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:20,267 INFO L519 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] [2021-03-11 00:33:20,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:20,468 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 64 times [2021-03-11 00:33:20,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:20,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740998796] [2021-03-11 00:33:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:20,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740998796] [2021-03-11 00:33:20,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411918345] [2021-03-11 00:33:20,531 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 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 [2021-03-11 00:33:20,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:33:20,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:20,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:20,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:20,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:33:20,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807092212] [2021-03-11 00:33:20,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:20,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:20,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:20,727 INFO L87 Difference]: Start difference. First operand 3313 states and 11772 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) [2021-03-11 00:33:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:21,911 INFO L93 Difference]: Finished difference Result 5556 states and 17694 transitions. [2021-03-11 00:33:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:33:21,913 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 [2021-03-11 00:33:21,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:21,923 INFO L225 Difference]: With dead ends: 5556 [2021-03-11 00:33:21,923 INFO L226 Difference]: Without dead ends: 5525 [2021-03-11 00:33:21,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:33:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-03-11 00:33:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 3306. [2021-03-11 00:33:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.5606656580937974) internal successors, (11768), 3305 states have internal predecessors, (11768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11768 transitions. [2021-03-11 00:33:21,988 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11768 transitions. Word has length 28 [2021-03-11 00:33:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:21,989 INFO L480 AbstractCegarLoop]: Abstraction has 3306 states and 11768 transitions. [2021-03-11 00:33:21,989 INFO L481 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) [2021-03-11 00:33:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11768 transitions. [2021-03-11 00:33:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:21,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:21,993 INFO L519 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] [2021-03-11 00:33:22,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-03-11 00:33:22,194 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 65 times [2021-03-11 00:33:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:22,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712980739] [2021-03-11 00:33:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712980739] [2021-03-11 00:33:22,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61278698] [2021-03-11 00:33:22,258 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 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 [2021-03-11 00:33:22,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:33:22,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:22,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:22,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:22,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:22,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:22,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572663219] [2021-03-11 00:33:22,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:22,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:22,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:22,535 INFO L87 Difference]: Start difference. First operand 3306 states and 11768 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) [2021-03-11 00:33:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:24,264 INFO L93 Difference]: Finished difference Result 6732 states and 21804 transitions. [2021-03-11 00:33:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:33:24,265 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 [2021-03-11 00:33:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:24,279 INFO L225 Difference]: With dead ends: 6732 [2021-03-11 00:33:24,279 INFO L226 Difference]: Without dead ends: 6685 [2021-03-11 00:33:24,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1040.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:33:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-03-11 00:33:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 3469. [2021-03-11 00:33:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 3.605824682814302) internal successors, (12505), 3468 states have internal predecessors, (12505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 12505 transitions. [2021-03-11 00:33:24,378 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 12505 transitions. Word has length 28 [2021-03-11 00:33:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:24,378 INFO L480 AbstractCegarLoop]: Abstraction has 3469 states and 12505 transitions. [2021-03-11 00:33:24,378 INFO L481 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) [2021-03-11 00:33:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 12505 transitions. [2021-03-11 00:33:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:24,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:24,385 INFO L519 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] [2021-03-11 00:33:24,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-03-11 00:33:24,586 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 359577472, now seen corresponding path program 66 times [2021-03-11 00:33:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:24,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001034630] [2021-03-11 00:33:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:24,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001034630] [2021-03-11 00:33:24,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585563198] [2021-03-11 00:33:24,657 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 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 [2021-03-11 00:33:24,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:33:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:33:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:33:24,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:24,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:33:24,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365844767] [2021-03-11 00:33:24,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:33:24,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:24,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:33:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:33:24,915 INFO L87 Difference]: Start difference. First operand 3469 states and 12505 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) [2021-03-11 00:33:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:25,193 INFO L93 Difference]: Finished difference Result 5136 states and 17042 transitions. [2021-03-11 00:33:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:33:25,194 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 [2021-03-11 00:33:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:25,203 INFO L225 Difference]: With dead ends: 5136 [2021-03-11 00:33:25,203 INFO L226 Difference]: Without dead ends: 5136 [2021-03-11 00:33:25,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:33:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-03-11 00:33:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 3266. [2021-03-11 00:33:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 3265 states have (on average 3.559571209800919) internal successors, (11622), 3265 states have internal predecessors, (11622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 11622 transitions. [2021-03-11 00:33:25,262 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 11622 transitions. Word has length 28 [2021-03-11 00:33:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:25,262 INFO L480 AbstractCegarLoop]: Abstraction has 3266 states and 11622 transitions. [2021-03-11 00:33:25,262 INFO L481 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) [2021-03-11 00:33:25,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 11622 transitions. [2021-03-11 00:33:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:25,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:25,266 INFO L519 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] [2021-03-11 00:33:25,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-03-11 00:33:25,467 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:25,467 INFO L82 PathProgramCache]: Analyzing trace with hash -987104094, now seen corresponding path program 67 times [2021-03-11 00:33:25,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:25,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955910986] [2021-03-11 00:33:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:25,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955910986] [2021-03-11 00:33:25,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637109905] [2021-03-11 00:33:25,523 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 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 [2021-03-11 00:33:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:25,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:25,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:25,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:25,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992154484] [2021-03-11 00:33:25,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:25,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:25,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:25,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:25,717 INFO L87 Difference]: Start difference. First operand 3266 states and 11622 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) [2021-03-11 00:33:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:26,817 INFO L93 Difference]: Finished difference Result 7168 states and 22913 transitions. [2021-03-11 00:33:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:33:26,819 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 [2021-03-11 00:33:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:26,831 INFO L225 Difference]: With dead ends: 7168 [2021-03-11 00:33:26,831 INFO L226 Difference]: Without dead ends: 7168 [2021-03-11 00:33:26,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 670.0ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:33:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-03-11 00:33:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3296. [2021-03-11 00:33:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3295 states have (on average 3.559028831562974) internal successors, (11727), 3295 states have internal predecessors, (11727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 11727 transitions. [2021-03-11 00:33:26,948 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 11727 transitions. Word has length 28 [2021-03-11 00:33:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:26,948 INFO L480 AbstractCegarLoop]: Abstraction has 3296 states and 11727 transitions. [2021-03-11 00:33:26,948 INFO L481 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) [2021-03-11 00:33:26,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 11727 transitions. [2021-03-11 00:33:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:26,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:26,953 INFO L519 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] [2021-03-11 00:33:27,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:27,153 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash -202190000, now seen corresponding path program 68 times [2021-03-11 00:33:27,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:27,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384742980] [2021-03-11 00:33:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:27,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384742980] [2021-03-11 00:33:27,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348131644] [2021-03-11 00:33:27,216 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 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 [2021-03-11 00:33:27,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:33:27,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:27,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:27,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:27,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:27,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:27,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778356144] [2021-03-11 00:33:27,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:27,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:27,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:27,530 INFO L87 Difference]: Start difference. First operand 3296 states and 11727 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) [2021-03-11 00:33:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:29,823 INFO L93 Difference]: Finished difference Result 7462 states and 23886 transitions. [2021-03-11 00:33:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:33:29,824 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 [2021-03-11 00:33:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:29,838 INFO L225 Difference]: With dead ends: 7462 [2021-03-11 00:33:29,839 INFO L226 Difference]: Without dead ends: 7462 [2021-03-11 00:33:29,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1186.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:33:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2021-03-11 00:33:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 3426. [2021-03-11 00:33:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 3.542773722627737) internal successors, (12134), 3425 states have internal predecessors, (12134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 12134 transitions. [2021-03-11 00:33:29,946 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 12134 transitions. Word has length 28 [2021-03-11 00:33:29,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:29,947 INFO L480 AbstractCegarLoop]: Abstraction has 3426 states and 12134 transitions. [2021-03-11 00:33:29,947 INFO L481 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) [2021-03-11 00:33:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 12134 transitions. [2021-03-11 00:33:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:29,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:29,953 INFO L519 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] [2021-03-11 00:33:30,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:30,153 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1285212656, now seen corresponding path program 69 times [2021-03-11 00:33:30,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:30,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266384659] [2021-03-11 00:33:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:30,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266384659] [2021-03-11 00:33:30,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676624664] [2021-03-11 00:33:30,216 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 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 [2021-03-11 00:33:30,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:33:30,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:30,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:30,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:30,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:30,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325623344] [2021-03-11 00:33:30,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:30,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:30,375 INFO L87 Difference]: Start difference. First operand 3426 states and 12134 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) [2021-03-11 00:33:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:31,470 INFO L93 Difference]: Finished difference Result 7933 states and 25424 transitions. [2021-03-11 00:33:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:33:31,472 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 [2021-03-11 00:33:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:31,487 INFO L225 Difference]: With dead ends: 7933 [2021-03-11 00:33:31,487 INFO L226 Difference]: Without dead ends: 7920 [2021-03-11 00:33:31,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:33:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-03-11 00:33:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 4071. [2021-03-11 00:33:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4071 states, 4070 states have (on average 3.5847665847665846) internal successors, (14590), 4070 states have internal predecessors, (14590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4071 states to 4071 states and 14590 transitions. [2021-03-11 00:33:31,568 INFO L78 Accepts]: Start accepts. Automaton has 4071 states and 14590 transitions. Word has length 28 [2021-03-11 00:33:31,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:31,569 INFO L480 AbstractCegarLoop]: Abstraction has 4071 states and 14590 transitions. [2021-03-11 00:33:31,569 INFO L481 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) [2021-03-11 00:33:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4071 states and 14590 transitions. [2021-03-11 00:33:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:31,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:31,574 INFO L519 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] [2021-03-11 00:33:31,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:31,775 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:31,775 INFO L82 PathProgramCache]: Analyzing trace with hash 185865462, now seen corresponding path program 70 times [2021-03-11 00:33:31,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:31,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907915337] [2021-03-11 00:33:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907915337] [2021-03-11 00:33:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519778305] [2021-03-11 00:33:31,876 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 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 [2021-03-11 00:33:31,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:33:31,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:33:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:32,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:32,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:32,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199511902] [2021-03-11 00:33:32,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:32,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:32,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:32,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:32,259 INFO L87 Difference]: Start difference. First operand 4071 states and 14590 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) [2021-03-11 00:33:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:34,163 INFO L93 Difference]: Finished difference Result 8195 states and 26154 transitions. [2021-03-11 00:33:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:33:34,165 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 [2021-03-11 00:33:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:34,182 INFO L225 Difference]: With dead ends: 8195 [2021-03-11 00:33:34,182 INFO L226 Difference]: Without dead ends: 8195 [2021-03-11 00:33:34,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1209.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:33:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8195 states. [2021-03-11 00:33:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8195 to 3824. [2021-03-11 00:33:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3823 states have (on average 3.550353125817421) internal successors, (13573), 3823 states have internal predecessors, (13573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 13573 transitions. [2021-03-11 00:33:34,282 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 13573 transitions. Word has length 28 [2021-03-11 00:33:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:34,282 INFO L480 AbstractCegarLoop]: Abstraction has 3824 states and 13573 transitions. [2021-03-11 00:33:34,282 INFO L481 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) [2021-03-11 00:33:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 13573 transitions. [2021-03-11 00:33:34,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:34,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:34,288 INFO L519 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] [2021-03-11 00:33:34,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable373 [2021-03-11 00:33:34,488 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash -247011142, now seen corresponding path program 71 times [2021-03-11 00:33:34,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:34,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937521100] [2021-03-11 00:33:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:34,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937521100] [2021-03-11 00:33:34,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510781847] [2021-03-11 00:33:34,544 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 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 [2021-03-11 00:33:34,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:33:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:34,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:34,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:33:34,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83644183] [2021-03-11 00:33:34,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:33:34,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:34,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:33:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:33:34,701 INFO L87 Difference]: Start difference. First operand 3824 states and 13573 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) [2021-03-11 00:33:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:35,925 INFO L93 Difference]: Finished difference Result 7301 states and 23970 transitions. [2021-03-11 00:33:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:33:35,927 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 [2021-03-11 00:33:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:35,940 INFO L225 Difference]: With dead ends: 7301 [2021-03-11 00:33:35,941 INFO L226 Difference]: Without dead ends: 7297 [2021-03-11 00:33:35,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:33:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7297 states. [2021-03-11 00:33:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7297 to 3457. [2021-03-11 00:33:36,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3457 states, 3456 states have (on average 3.595775462962963) internal successors, (12427), 3456 states have internal predecessors, (12427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3457 states to 3457 states and 12427 transitions. [2021-03-11 00:33:36,039 INFO L78 Accepts]: Start accepts. Automaton has 3457 states and 12427 transitions. Word has length 28 [2021-03-11 00:33:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:36,039 INFO L480 AbstractCegarLoop]: Abstraction has 3457 states and 12427 transitions. [2021-03-11 00:33:36,039 INFO L481 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) [2021-03-11 00:33:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3457 states and 12427 transitions. [2021-03-11 00:33:36,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:36,044 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:36,044 INFO L519 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] [2021-03-11 00:33:36,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:36,245 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:36,245 INFO L82 PathProgramCache]: Analyzing trace with hash -519020332, now seen corresponding path program 72 times [2021-03-11 00:33:36,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:36,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169940686] [2021-03-11 00:33:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169940686] [2021-03-11 00:33:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886923184] [2021-03-11 00:33:36,297 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 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 [2021-03-11 00:33:36,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:33:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:36,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:36,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:36,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:33:36,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571418452] [2021-03-11 00:33:36,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:36,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:36,559 INFO L87 Difference]: Start difference. First operand 3457 states and 12427 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) [2021-03-11 00:33:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:39,521 INFO L93 Difference]: Finished difference Result 11600 states and 38331 transitions. [2021-03-11 00:33:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-11 00:33:39,523 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 [2021-03-11 00:33:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:39,549 INFO L225 Difference]: With dead ends: 11600 [2021-03-11 00:33:39,549 INFO L226 Difference]: Without dead ends: 11600 [2021-03-11 00:33:39,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 1610.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:33:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2021-03-11 00:33:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 3751. [2021-03-11 00:33:39,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 3.6784) internal successors, (13794), 3750 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 13794 transitions. [2021-03-11 00:33:39,711 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 13794 transitions. Word has length 28 [2021-03-11 00:33:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:39,711 INFO L480 AbstractCegarLoop]: Abstraction has 3751 states and 13794 transitions. [2021-03-11 00:33:39,711 INFO L481 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) [2021-03-11 00:33:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 13794 transitions. [2021-03-11 00:33:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:39,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:39,716 INFO L519 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] [2021-03-11 00:33:39,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-03-11 00:33:39,928 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 47931748, now seen corresponding path program 73 times [2021-03-11 00:33:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:39,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783574419] [2021-03-11 00:33:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:39,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783574419] [2021-03-11 00:33:39,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832779767] [2021-03-11 00:33:39,988 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 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 [2021-03-11 00:33:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:40,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:40,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:40,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:33:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471788952] [2021-03-11 00:33:40,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:40,201 INFO L87 Difference]: Start difference. First operand 3751 states and 13794 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) [2021-03-11 00:33:43,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:43,002 INFO L93 Difference]: Finished difference Result 11294 states and 37514 transitions. [2021-03-11 00:33:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-11 00:33:43,004 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 [2021-03-11 00:33:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:43,039 INFO L225 Difference]: With dead ends: 11294 [2021-03-11 00:33:43,039 INFO L226 Difference]: Without dead ends: 11294 [2021-03-11 00:33:43,039 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 1623.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:33:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11294 states. [2021-03-11 00:33:43,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11294 to 3699. [2021-03-11 00:33:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.657382368848026) internal successors, (13525), 3698 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 13525 transitions. [2021-03-11 00:33:43,226 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 13525 transitions. Word has length 28 [2021-03-11 00:33:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:43,226 INFO L480 AbstractCegarLoop]: Abstraction has 3699 states and 13525 transitions. [2021-03-11 00:33:43,226 INFO L481 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) [2021-03-11 00:33:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 13525 transitions. [2021-03-11 00:33:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:43,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:43,233 INFO L519 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] [2021-03-11 00:33:43,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:43,434 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1124414110, now seen corresponding path program 74 times [2021-03-11 00:33:43,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:43,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118715290] [2021-03-11 00:33:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:43,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118715290] [2021-03-11 00:33:43,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182492215] [2021-03-11 00:33:43,514 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 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 [2021-03-11 00:33:43,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:33:43,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:43,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:43,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:43,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:43,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:33:43,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847273363] [2021-03-11 00:33:43,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:33:43,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:33:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:33:43,717 INFO L87 Difference]: Start difference. First operand 3699 states and 13525 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) [2021-03-11 00:33:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:45,526 INFO L93 Difference]: Finished difference Result 10614 states and 34080 transitions. [2021-03-11 00:33:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-11 00:33:45,528 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 [2021-03-11 00:33:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:45,548 INFO L225 Difference]: With dead ends: 10614 [2021-03-11 00:33:45,548 INFO L226 Difference]: Without dead ends: 10614 [2021-03-11 00:33:45,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 974.5ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:33:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10614 states. [2021-03-11 00:33:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10614 to 3739. [2021-03-11 00:33:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 3.6615837346174427) internal successors, (13687), 3738 states have internal predecessors, (13687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 13687 transitions. [2021-03-11 00:33:45,686 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 13687 transitions. Word has length 28 [2021-03-11 00:33:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:45,687 INFO L480 AbstractCegarLoop]: Abstraction has 3739 states and 13687 transitions. [2021-03-11 00:33:45,687 INFO L481 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) [2021-03-11 00:33:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 13687 transitions. [2021-03-11 00:33:45,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:45,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:45,692 INFO L519 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] [2021-03-11 00:33:45,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-03-11 00:33:45,893 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1043038022, now seen corresponding path program 75 times [2021-03-11 00:33:45,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:45,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623231042] [2021-03-11 00:33:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:45,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623231042] [2021-03-11 00:33:45,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888868602] [2021-03-11 00:33:45,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:33:45,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:33:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:46,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:46,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:33:46,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39212165] [2021-03-11 00:33:46,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:33:46,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:46,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:33:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:33:46,259 INFO L87 Difference]: Start difference. First operand 3739 states and 13687 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) [2021-03-11 00:33:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:49,304 INFO L93 Difference]: Finished difference Result 10000 states and 32572 transitions. [2021-03-11 00:33:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-11 00:33:49,306 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 [2021-03-11 00:33:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:49,324 INFO L225 Difference]: With dead ends: 10000 [2021-03-11 00:33:49,324 INFO L226 Difference]: Without dead ends: 9992 [2021-03-11 00:33:49,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1633.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:33:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2021-03-11 00:33:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 3705. [2021-03-11 00:33:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3704 states have (on average 3.6565874730021597) internal successors, (13544), 3704 states have internal predecessors, (13544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 13544 transitions. [2021-03-11 00:33:49,454 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 13544 transitions. Word has length 28 [2021-03-11 00:33:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:49,454 INFO L480 AbstractCegarLoop]: Abstraction has 3705 states and 13544 transitions. [2021-03-11 00:33:49,454 INFO L481 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) [2021-03-11 00:33:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 13544 transitions. [2021-03-11 00:33:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:49,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:49,459 INFO L519 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] [2021-03-11 00:33:49,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-03-11 00:33:49,660 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:49,660 INFO L82 PathProgramCache]: Analyzing trace with hash -112380806, now seen corresponding path program 76 times [2021-03-11 00:33:49,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:49,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187762963] [2021-03-11 00:33:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:49,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187762963] [2021-03-11 00:33:49,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882032225] [2021-03-11 00:33:49,721 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 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 [2021-03-11 00:33:49,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:33:49,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:49,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:49,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:49,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:33:49,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326739141] [2021-03-11 00:33:49,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:49,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:49,923 INFO L87 Difference]: Start difference. First operand 3705 states and 13544 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) [2021-03-11 00:33:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:52,259 INFO L93 Difference]: Finished difference Result 9602 states and 31462 transitions. [2021-03-11 00:33:52,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-11 00:33:52,262 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 [2021-03-11 00:33:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:52,289 INFO L225 Difference]: With dead ends: 9602 [2021-03-11 00:33:52,289 INFO L226 Difference]: Without dead ends: 9602 [2021-03-11 00:33:52,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1238.8ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:33:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9602 states. [2021-03-11 00:33:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9602 to 3721. [2021-03-11 00:33:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3721 states, 3720 states have (on average 3.6580645161290324) internal successors, (13608), 3720 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 13608 transitions. [2021-03-11 00:33:52,443 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 13608 transitions. Word has length 28 [2021-03-11 00:33:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:52,443 INFO L480 AbstractCegarLoop]: Abstraction has 3721 states and 13608 transitions. [2021-03-11 00:33:52,443 INFO L481 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) [2021-03-11 00:33:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 13608 transitions. [2021-03-11 00:33:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:52,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:52,451 INFO L519 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] [2021-03-11 00:33:52,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:52,651 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:52,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1530658348, now seen corresponding path program 77 times [2021-03-11 00:33:52,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:52,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829094748] [2021-03-11 00:33:52,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:52,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829094748] [2021-03-11 00:33:52,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670851198] [2021-03-11 00:33:52,771 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 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 [2021-03-11 00:33:52,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:33:52,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:53,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:53,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:33:53,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424060428] [2021-03-11 00:33:53,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:53,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:53,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:53,167 INFO L87 Difference]: Start difference. First operand 3721 states and 13608 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) [2021-03-11 00:33:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:55,064 INFO L93 Difference]: Finished difference Result 9267 states and 30667 transitions. [2021-03-11 00:33:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:33:55,065 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 [2021-03-11 00:33:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:55,081 INFO L225 Difference]: With dead ends: 9267 [2021-03-11 00:33:55,082 INFO L226 Difference]: Without dead ends: 9259 [2021-03-11 00:33:55,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1124.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:33:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9259 states. [2021-03-11 00:33:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9259 to 3389. [2021-03-11 00:33:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3388 states have (on average 3.5714285714285716) internal successors, (12100), 3388 states have internal predecessors, (12100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:33:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 12100 transitions. [2021-03-11 00:33:55,184 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 12100 transitions. Word has length 28 [2021-03-11 00:33:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:55,184 INFO L480 AbstractCegarLoop]: Abstraction has 3389 states and 12100 transitions. [2021-03-11 00:33:55,184 INFO L481 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) [2021-03-11 00:33:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 12100 transitions. [2021-03-11 00:33:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:55,188 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:55,189 INFO L519 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] [2021-03-11 00:33:55,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-03-11 00:33:55,395 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:55,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:55,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1614061928, now seen corresponding path program 78 times [2021-03-11 00:33:55,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:55,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256715023] [2021-03-11 00:33:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:55,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256715023] [2021-03-11 00:33:55,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715063547] [2021-03-11 00:33:55,450 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 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 [2021-03-11 00:33:55,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:33:55,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:33:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:55,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:55,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:33:55,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112349145] [2021-03-11 00:33:55,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:33:55,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:55,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:33:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:33:55,783 INFO L87 Difference]: Start difference. First operand 3389 states and 12100 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) [2021-03-11 00:33:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:33:58,412 INFO L93 Difference]: Finished difference Result 7033 states and 23007 transitions. [2021-03-11 00:33:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:33:58,414 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 [2021-03-11 00:33:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:33:58,427 INFO L225 Difference]: With dead ends: 7033 [2021-03-11 00:33:58,427 INFO L226 Difference]: Without dead ends: 7033 [2021-03-11 00:33:58,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1577.5ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:33:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2021-03-11 00:33:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 3401. [2021-03-11 00:33:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 3.57) internal successors, (12138), 3400 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) [2021-03-11 00:33:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 12138 transitions. [2021-03-11 00:33:58,501 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 12138 transitions. Word has length 28 [2021-03-11 00:33:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:33:58,501 INFO L480 AbstractCegarLoop]: Abstraction has 3401 states and 12138 transitions. [2021-03-11 00:33:58,501 INFO L481 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) [2021-03-11 00:33:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 12138 transitions. [2021-03-11 00:33:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:33:58,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:33:58,505 INFO L519 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] [2021-03-11 00:33:58,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:33:58,706 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:33:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:33:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1027545192, now seen corresponding path program 79 times [2021-03-11 00:33:58,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:33:58,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798268500] [2021-03-11 00:33:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:33:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:58,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798268500] [2021-03-11 00:33:58,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512499216] [2021-03-11 00:33:58,766 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 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 [2021-03-11 00:33:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:33:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:33:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:33:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:33:59,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:33:59,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:33:59,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217518489] [2021-03-11 00:33:59,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:33:59,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:33:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:33:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:33:59,010 INFO L87 Difference]: Start difference. First operand 3401 states and 12138 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) [2021-03-11 00:34:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:02,050 INFO L93 Difference]: Finished difference Result 7961 states and 25396 transitions. [2021-03-11 00:34:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:34:02,054 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 [2021-03-11 00:34:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:02,079 INFO L225 Difference]: With dead ends: 7961 [2021-03-11 00:34:02,079 INFO L226 Difference]: Without dead ends: 7961 [2021-03-11 00:34:02,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1874.6ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:34:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-03-11 00:34:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 3467. [2021-03-11 00:34:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 3.5646278130409694) internal successors, (12355), 3466 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 12355 transitions. [2021-03-11 00:34:02,203 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 12355 transitions. Word has length 28 [2021-03-11 00:34:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:02,203 INFO L480 AbstractCegarLoop]: Abstraction has 3467 states and 12355 transitions. [2021-03-11 00:34:02,204 INFO L481 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) [2021-03-11 00:34:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 12355 transitions. [2021-03-11 00:34:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:02,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:02,210 INFO L519 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] [2021-03-11 00:34:02,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:02,411 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash 615493962, now seen corresponding path program 80 times [2021-03-11 00:34:02,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:02,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436246478] [2021-03-11 00:34:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:02,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436246478] [2021-03-11 00:34:02,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027739051] [2021-03-11 00:34:02,572 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 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 [2021-03-11 00:34:02,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:34:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:02,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:03,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:03,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:34:03,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812386252] [2021-03-11 00:34:03,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:34:03,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:03,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:34:03,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:34:03,055 INFO L87 Difference]: Start difference. First operand 3467 states and 12355 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) [2021-03-11 00:34:06,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:06,383 INFO L93 Difference]: Finished difference Result 7344 states and 23768 transitions. [2021-03-11 00:34:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:34:06,385 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 [2021-03-11 00:34:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:06,403 INFO L225 Difference]: With dead ends: 7344 [2021-03-11 00:34:06,403 INFO L226 Difference]: Without dead ends: 7340 [2021-03-11 00:34:06,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 2216.4ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:34:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7340 states. [2021-03-11 00:34:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7340 to 3402. [2021-03-11 00:34:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5624816230520433) internal successors, (12116), 3401 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12116 transitions. [2021-03-11 00:34:06,534 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12116 transitions. Word has length 28 [2021-03-11 00:34:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:06,534 INFO L480 AbstractCegarLoop]: Abstraction has 3402 states and 12116 transitions. [2021-03-11 00:34:06,534 INFO L481 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) [2021-03-11 00:34:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12116 transitions. [2021-03-11 00:34:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:06,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:06,541 INFO L519 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] [2021-03-11 00:34:06,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:06,742 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:06,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1194937186, now seen corresponding path program 68 times [2021-03-11 00:34:06,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:06,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792595579] [2021-03-11 00:34:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792595579] [2021-03-11 00:34:06,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358242649] [2021-03-11 00:34:06,893 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 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 [2021-03-11 00:34:06,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:34:06,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:06,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:07,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:07,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:34:07,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342682454] [2021-03-11 00:34:07,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:34:07,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:07,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:34:07,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:34:07,283 INFO L87 Difference]: Start difference. First operand 3402 states and 12116 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) [2021-03-11 00:34:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:09,604 INFO L93 Difference]: Finished difference Result 6487 states and 21356 transitions. [2021-03-11 00:34:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:34:09,604 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 [2021-03-11 00:34:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:09,622 INFO L225 Difference]: With dead ends: 6487 [2021-03-11 00:34:09,622 INFO L226 Difference]: Without dead ends: 6487 [2021-03-11 00:34:09,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1313.6ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:34:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6487 states. [2021-03-11 00:34:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6487 to 3406. [2021-03-11 00:34:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 3.5641703377386196) internal successors, (12136), 3405 states have internal predecessors, (12136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 12136 transitions. [2021-03-11 00:34:09,723 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 12136 transitions. Word has length 28 [2021-03-11 00:34:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:09,723 INFO L480 AbstractCegarLoop]: Abstraction has 3406 states and 12136 transitions. [2021-03-11 00:34:09,723 INFO L481 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) [2021-03-11 00:34:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 12136 transitions. [2021-03-11 00:34:09,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:09,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:09,757 INFO L519 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] [2021-03-11 00:34:09,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:09,967 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash -416862576, now seen corresponding path program 69 times [2021-03-11 00:34:09,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:09,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283554354] [2021-03-11 00:34:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283554354] [2021-03-11 00:34:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134222274] [2021-03-11 00:34:10,115 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 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 [2021-03-11 00:34:10,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:34:10,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:10,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:10,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:10,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:34:10,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075913894] [2021-03-11 00:34:10,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:34:10,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:10,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:34:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:34:10,521 INFO L87 Difference]: Start difference. First operand 3406 states and 12136 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) [2021-03-11 00:34:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:13,472 INFO L93 Difference]: Finished difference Result 6961 states and 22678 transitions. [2021-03-11 00:34:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:34:13,476 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 [2021-03-11 00:34:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:13,496 INFO L225 Difference]: With dead ends: 6961 [2021-03-11 00:34:13,496 INFO L226 Difference]: Without dead ends: 6961 [2021-03-11 00:34:13,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1772.4ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:34:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-03-11 00:34:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 3420. [2021-03-11 00:34:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.5615677098566834) internal successors, (12177), 3419 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 12177 transitions. [2021-03-11 00:34:13,616 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 12177 transitions. Word has length 28 [2021-03-11 00:34:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:13,616 INFO L480 AbstractCegarLoop]: Abstraction has 3420 states and 12177 transitions. [2021-03-11 00:34:13,616 INFO L481 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) [2021-03-11 00:34:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 12177 transitions. [2021-03-11 00:34:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:13,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:13,646 INFO L519 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] [2021-03-11 00:34:13,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-03-11 00:34:13,847 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:13,847 INFO L82 PathProgramCache]: Analyzing trace with hash -648402224, now seen corresponding path program 70 times [2021-03-11 00:34:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:13,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901143994] [2021-03-11 00:34:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901143994] [2021-03-11 00:34:14,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927024382] [2021-03-11 00:34:14,005 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 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 [2021-03-11 00:34:14,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:34:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:14,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:14,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:14,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:34:14,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477186021] [2021-03-11 00:34:14,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:34:14,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:14,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:34:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:34:14,414 INFO L87 Difference]: Start difference. First operand 3420 states and 12177 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) [2021-03-11 00:34:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:17,846 INFO L93 Difference]: Finished difference Result 7467 states and 24110 transitions. [2021-03-11 00:34:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-11 00:34:17,850 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 [2021-03-11 00:34:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:17,870 INFO L225 Difference]: With dead ends: 7467 [2021-03-11 00:34:17,870 INFO L226 Difference]: Without dead ends: 7467 [2021-03-11 00:34:17,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 2041.2ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:34:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7467 states. [2021-03-11 00:34:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7467 to 3500. [2021-03-11 00:34:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 3499 states have (on average 3.5550157187767932) internal successors, (12439), 3499 states have internal predecessors, (12439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 12439 transitions. [2021-03-11 00:34:18,012 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 12439 transitions. Word has length 28 [2021-03-11 00:34:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:18,012 INFO L480 AbstractCegarLoop]: Abstraction has 3500 states and 12439 transitions. [2021-03-11 00:34:18,013 INFO L481 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) [2021-03-11 00:34:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 12439 transitions. [2021-03-11 00:34:18,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:18,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:18,020 INFO L519 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] [2021-03-11 00:34:18,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-03-11 00:34:18,220 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash -628686410, now seen corresponding path program 71 times [2021-03-11 00:34:18,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:18,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111402245] [2021-03-11 00:34:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:18,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111402245] [2021-03-11 00:34:18,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970072815] [2021-03-11 00:34:18,351 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 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 [2021-03-11 00:34:18,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:34:18,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:18,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:18,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:18,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-11 00:34:18,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519701398] [2021-03-11 00:34:18,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:34:18,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:18,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:34:18,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:34:18,827 INFO L87 Difference]: Start difference. First operand 3500 states and 12439 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) [2021-03-11 00:34:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:21,061 INFO L93 Difference]: Finished difference Result 7330 states and 25046 transitions. [2021-03-11 00:34:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:34:21,064 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 [2021-03-11 00:34:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:21,085 INFO L225 Difference]: With dead ends: 7330 [2021-03-11 00:34:21,085 INFO L226 Difference]: Without dead ends: 7330 [2021-03-11 00:34:21,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1546.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:34:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-03-11 00:34:21,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 4678. [2021-03-11 00:34:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 3.6730810348514003) internal successors, (17179), 4677 states have internal predecessors, (17179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 17179 transitions. [2021-03-11 00:34:21,275 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 17179 transitions. Word has length 28 [2021-03-11 00:34:21,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:21,275 INFO L480 AbstractCegarLoop]: Abstraction has 4678 states and 17179 transitions. [2021-03-11 00:34:21,275 INFO L481 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) [2021-03-11 00:34:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 17179 transitions. [2021-03-11 00:34:21,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:21,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:21,285 INFO L519 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] [2021-03-11 00:34:21,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-03-11 00:34:21,486 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash -693223366, now seen corresponding path program 72 times [2021-03-11 00:34:21,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:21,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934548193] [2021-03-11 00:34:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934548193] [2021-03-11 00:34:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875303922] [2021-03-11 00:34:21,643 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 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 [2021-03-11 00:34:21,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:34:21,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:22,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:22,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:34:22,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374404414] [2021-03-11 00:34:22,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:34:22,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:34:22,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:34:22,039 INFO L87 Difference]: Start difference. First operand 4678 states and 17179 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) [2021-03-11 00:34:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:24,697 INFO L93 Difference]: Finished difference Result 8463 states and 28955 transitions. [2021-03-11 00:34:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:34:24,698 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 [2021-03-11 00:34:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:24,714 INFO L225 Difference]: With dead ends: 8463 [2021-03-11 00:34:24,714 INFO L226 Difference]: Without dead ends: 8459 [2021-03-11 00:34:24,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1596.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:34:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8459 states. [2021-03-11 00:34:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8459 to 4570. [2021-03-11 00:34:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 3.683738235937842) internal successors, (16831), 4569 states have internal predecessors, (16831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 16831 transitions. [2021-03-11 00:34:24,832 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 16831 transitions. Word has length 28 [2021-03-11 00:34:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:24,832 INFO L480 AbstractCegarLoop]: Abstraction has 4570 states and 16831 transitions. [2021-03-11 00:34:24,832 INFO L481 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) [2021-03-11 00:34:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 16831 transitions. [2021-03-11 00:34:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:24,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:24,838 INFO L519 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] [2021-03-11 00:34:25,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-03-11 00:34:25,039 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:25,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:25,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1327034102, now seen corresponding path program 81 times [2021-03-11 00:34:25,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:25,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438206825] [2021-03-11 00:34:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:25,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438206825] [2021-03-11 00:34:25,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144547169] [2021-03-11 00:34:25,093 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 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 [2021-03-11 00:34:25,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:34:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:34:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:25,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:25,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:34:25,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612804975] [2021-03-11 00:34:25,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:34:25,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:34:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:34:25,308 INFO L87 Difference]: Start difference. First operand 4570 states and 16831 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) [2021-03-11 00:34:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:27,755 INFO L93 Difference]: Finished difference Result 9645 states and 32628 transitions. [2021-03-11 00:34:27,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:34:27,759 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 [2021-03-11 00:34:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:27,788 INFO L225 Difference]: With dead ends: 9645 [2021-03-11 00:34:27,788 INFO L226 Difference]: Without dead ends: 9633 [2021-03-11 00:34:27,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1225.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:34:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9633 states. [2021-03-11 00:34:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9633 to 5049. [2021-03-11 00:34:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 3.7652535657686212) internal successors, (19007), 5048 states have internal predecessors, (19007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:27,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 19007 transitions. [2021-03-11 00:34:27,958 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 19007 transitions. Word has length 28 [2021-03-11 00:34:27,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:27,958 INFO L480 AbstractCegarLoop]: Abstraction has 5049 states and 19007 transitions. [2021-03-11 00:34:27,958 INFO L481 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) [2021-03-11 00:34:27,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 19007 transitions. [2021-03-11 00:34:27,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:27,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:27,970 INFO L519 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] [2021-03-11 00:34:28,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-03-11 00:34:28,171 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -926591794, now seen corresponding path program 82 times [2021-03-11 00:34:28,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:28,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248611904] [2021-03-11 00:34:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248611904] [2021-03-11 00:34:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263316947] [2021-03-11 00:34:28,282 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 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 [2021-03-11 00:34:28,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:34:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:34:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:28,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:28,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:34:28,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265534213] [2021-03-11 00:34:28,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:34:28,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:34:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:34:28,690 INFO L87 Difference]: Start difference. First operand 5049 states and 19007 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) [2021-03-11 00:34:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:31,939 INFO L93 Difference]: Finished difference Result 9975 states and 33666 transitions. [2021-03-11 00:34:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:34:31,943 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 [2021-03-11 00:34:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:31,970 INFO L225 Difference]: With dead ends: 9975 [2021-03-11 00:34:31,970 INFO L226 Difference]: Without dead ends: 9975 [2021-03-11 00:34:31,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1895.7ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:34:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9975 states. [2021-03-11 00:34:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9975 to 5068. [2021-03-11 00:34:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5068 states, 5067 states have (on average 3.7499506611407143) internal successors, (19001), 5067 states have internal predecessors, (19001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 19001 transitions. [2021-03-11 00:34:32,138 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 19001 transitions. Word has length 28 [2021-03-11 00:34:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:32,139 INFO L480 AbstractCegarLoop]: Abstraction has 5068 states and 19001 transitions. [2021-03-11 00:34:32,139 INFO L481 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) [2021-03-11 00:34:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 19001 transitions. [2021-03-11 00:34:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:32,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:32,149 INFO L519 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] [2021-03-11 00:34:32,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-03-11 00:34:32,350 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:32,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2129998084, now seen corresponding path program 83 times [2021-03-11 00:34:32,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:32,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999616776] [2021-03-11 00:34:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:32,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999616776] [2021-03-11 00:34:32,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489411188] [2021-03-11 00:34:32,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:34:32,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:34:32,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:32,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:34:32,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:32,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:32,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:34:32,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069113891] [2021-03-11 00:34:32,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:34:32,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:32,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:34:32,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:34:32,831 INFO L87 Difference]: Start difference. First operand 5068 states and 19001 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) [2021-03-11 00:34:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:34,568 INFO L93 Difference]: Finished difference Result 9405 states and 33542 transitions. [2021-03-11 00:34:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:34:34,572 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 [2021-03-11 00:34:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:34,600 INFO L225 Difference]: With dead ends: 9405 [2021-03-11 00:34:34,600 INFO L226 Difference]: Without dead ends: 9322 [2021-03-11 00:34:34,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 944.7ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:34:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9322 states. [2021-03-11 00:34:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9322 to 6492. [2021-03-11 00:34:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6492 states, 6491 states have (on average 3.795717146818672) internal successors, (24638), 6491 states have internal predecessors, (24638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6492 states to 6492 states and 24638 transitions. [2021-03-11 00:34:34,784 INFO L78 Accepts]: Start accepts. Automaton has 6492 states and 24638 transitions. Word has length 28 [2021-03-11 00:34:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:34,784 INFO L480 AbstractCegarLoop]: Abstraction has 6492 states and 24638 transitions. [2021-03-11 00:34:34,784 INFO L481 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) [2021-03-11 00:34:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6492 states and 24638 transitions. [2021-03-11 00:34:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:34,798 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:34,798 INFO L519 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] [2021-03-11 00:34:34,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:34,998 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash -921983104, now seen corresponding path program 84 times [2021-03-11 00:34:34,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:34,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814979842] [2021-03-11 00:34:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:34:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814979842] [2021-03-11 00:34:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560807405] [2021-03-11 00:34:35,099 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 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 [2021-03-11 00:34:35,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:34:35,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:34:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:34:35,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:35,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-11 00:34:35,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286992153] [2021-03-11 00:34:35,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:34:35,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:35,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:34:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:34:35,407 INFO L87 Difference]: Start difference. First operand 6492 states and 24638 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) [2021-03-11 00:34:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:36,036 INFO L93 Difference]: Finished difference Result 8975 states and 31868 transitions. [2021-03-11 00:34:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:34:36,039 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 [2021-03-11 00:34:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:36,064 INFO L225 Difference]: With dead ends: 8975 [2021-03-11 00:34:36,064 INFO L226 Difference]: Without dead ends: 8975 [2021-03-11 00:34:36,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:34:36,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-03-11 00:34:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 6570. [2021-03-11 00:34:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.777896179022682) internal successors, (24817), 6569 states have internal predecessors, (24817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 24817 transitions. [2021-03-11 00:34:36,265 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 24817 transitions. Word has length 28 [2021-03-11 00:34:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:36,265 INFO L480 AbstractCegarLoop]: Abstraction has 6570 states and 24817 transitions. [2021-03-11 00:34:36,265 INFO L481 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) [2021-03-11 00:34:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 24817 transitions. [2021-03-11 00:34:36,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:36,279 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:36,279 INFO L519 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] [2021-03-11 00:34:36,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:36,479 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash 8216640, now seen corresponding path program 85 times [2021-03-11 00:34:36,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:36,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399835929] [2021-03-11 00:34:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:36,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399835929] [2021-03-11 00:34:36,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971350974] [2021-03-11 00:34:36,625 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 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 [2021-03-11 00:34:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:36,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:36,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:36,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:34:36,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629143305] [2021-03-11 00:34:36,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:34:36,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:36,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:34:36,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:34:36,962 INFO L87 Difference]: Start difference. First operand 6570 states and 24817 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) [2021-03-11 00:34:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:39,468 INFO L93 Difference]: Finished difference Result 13578 states and 47526 transitions. [2021-03-11 00:34:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:34:39,472 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 [2021-03-11 00:34:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:39,562 INFO L225 Difference]: With dead ends: 13578 [2021-03-11 00:34:39,562 INFO L226 Difference]: Without dead ends: 13578 [2021-03-11 00:34:39,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1550.1ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:34:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13578 states. [2021-03-11 00:34:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13578 to 7315. [2021-03-11 00:34:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 3.7873940388296417) internal successors, (27701), 7314 states have internal predecessors, (27701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 27701 transitions. [2021-03-11 00:34:39,798 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 27701 transitions. Word has length 28 [2021-03-11 00:34:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:39,798 INFO L480 AbstractCegarLoop]: Abstraction has 7315 states and 27701 transitions. [2021-03-11 00:34:39,798 INFO L481 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) [2021-03-11 00:34:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 27701 transitions. [2021-03-11 00:34:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:39,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:39,811 INFO L519 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] [2021-03-11 00:34:40,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:40,012 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:40,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1910896092, now seen corresponding path program 86 times [2021-03-11 00:34:40,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:40,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845534383] [2021-03-11 00:34:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:40,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845534383] [2021-03-11 00:34:40,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487204909] [2021-03-11 00:34:40,142 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 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 [2021-03-11 00:34:40,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:34:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:40,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:40,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-03-11 00:34:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970272754] [2021-03-11 00:34:40,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:34:40,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:34:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:34:40,457 INFO L87 Difference]: Start difference. First operand 7315 states and 27701 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:42,063 INFO L93 Difference]: Finished difference Result 13779 states and 48245 transitions. [2021-03-11 00:34:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:34:42,065 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 [2021-03-11 00:34:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:42,093 INFO L225 Difference]: With dead ends: 13779 [2021-03-11 00:34:42,093 INFO L226 Difference]: Without dead ends: 13779 [2021-03-11 00:34:42,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:34:42,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2021-03-11 00:34:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 7585. [2021-03-11 00:34:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.7655590717299576) internal successors, (28558), 7584 states have internal predecessors, (28558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 28558 transitions. [2021-03-11 00:34:42,273 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 28558 transitions. Word has length 28 [2021-03-11 00:34:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:42,274 INFO L480 AbstractCegarLoop]: Abstraction has 7585 states and 28558 transitions. [2021-03-11 00:34:42,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 28558 transitions. [2021-03-11 00:34:42,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:42,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:42,285 INFO L519 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] [2021-03-11 00:34:42,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:42,485 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:42,486 INFO L82 PathProgramCache]: Analyzing trace with hash 827873436, now seen corresponding path program 87 times [2021-03-11 00:34:42,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:42,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189994842] [2021-03-11 00:34:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:42,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189994842] [2021-03-11 00:34:42,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140046640] [2021-03-11 00:34:42,538 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 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 [2021-03-11 00:34:42,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:34:42,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:34:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:42,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:42,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:34:42,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908645841] [2021-03-11 00:34:42,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:34:42,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:42,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:34:42,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:34:42,701 INFO L87 Difference]: Start difference. First operand 7585 states and 28558 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) [2021-03-11 00:34:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:43,877 INFO L93 Difference]: Finished difference Result 10144 states and 36719 transitions. [2021-03-11 00:34:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:34:43,881 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 [2021-03-11 00:34:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:43,911 INFO L225 Difference]: With dead ends: 10144 [2021-03-11 00:34:43,911 INFO L226 Difference]: Without dead ends: 10114 [2021-03-11 00:34:43,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:34:43,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10114 states. [2021-03-11 00:34:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10114 to 8411. [2021-03-11 00:34:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8411 states, 8410 states have (on average 3.7869203329369796) internal successors, (31848), 8410 states have internal predecessors, (31848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8411 states to 8411 states and 31848 transitions. [2021-03-11 00:34:44,102 INFO L78 Accepts]: Start accepts. Automaton has 8411 states and 31848 transitions. Word has length 28 [2021-03-11 00:34:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:44,102 INFO L480 AbstractCegarLoop]: Abstraction has 8411 states and 31848 transitions. [2021-03-11 00:34:44,102 INFO L481 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) [2021-03-11 00:34:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8411 states and 31848 transitions. [2021-03-11 00:34:44,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:44,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:44,116 INFO L519 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] [2021-03-11 00:34:44,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:44,316 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1996015742, now seen corresponding path program 88 times [2021-03-11 00:34:44,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:44,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971542657] [2021-03-11 00:34:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:34:44,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971542657] [2021-03-11 00:34:44,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605428790] [2021-03-11 00:34:44,418 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 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 [2021-03-11 00:34:44,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:34:44,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:44,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:34:44,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:34:44,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:44,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:34:44,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876633949] [2021-03-11 00:34:44,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:34:44,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:34:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:34:44,718 INFO L87 Difference]: Start difference. First operand 8411 states and 31848 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) [2021-03-11 00:34:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:46,029 INFO L93 Difference]: Finished difference Result 10709 states and 38590 transitions. [2021-03-11 00:34:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:34:46,033 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 [2021-03-11 00:34:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:46,064 INFO L225 Difference]: With dead ends: 10709 [2021-03-11 00:34:46,065 INFO L226 Difference]: Without dead ends: 10709 [2021-03-11 00:34:46,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 753.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:34:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10709 states. [2021-03-11 00:34:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10709 to 8451. [2021-03-11 00:34:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 3.7830769230769232) internal successors, (31967), 8450 states have internal predecessors, (31967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 31967 transitions. [2021-03-11 00:34:46,334 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 31967 transitions. Word has length 28 [2021-03-11 00:34:46,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:46,334 INFO L480 AbstractCegarLoop]: Abstraction has 8451 states and 31967 transitions. [2021-03-11 00:34:46,334 INFO L481 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) [2021-03-11 00:34:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 31967 transitions. [2021-03-11 00:34:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:46,353 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:46,353 INFO L519 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] [2021-03-11 00:34:46,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:46,554 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1866074950, now seen corresponding path program 89 times [2021-03-11 00:34:46,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:46,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889468627] [2021-03-11 00:34:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:34:46,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889468627] [2021-03-11 00:34:46,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360493933] [2021-03-11 00:34:46,681 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 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 [2021-03-11 00:34:46,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:34:46,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:46,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:34:47,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:47,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-03-11 00:34:47,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928186511] [2021-03-11 00:34:47,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:34:47,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:34:47,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:34:47,003 INFO L87 Difference]: Start difference. First operand 8451 states and 31967 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:49,406 INFO L93 Difference]: Finished difference Result 14453 states and 51485 transitions. [2021-03-11 00:34:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:34:49,409 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 [2021-03-11 00:34:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:49,461 INFO L225 Difference]: With dead ends: 14453 [2021-03-11 00:34:49,461 INFO L226 Difference]: Without dead ends: 14449 [2021-03-11 00:34:49,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1364.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:34:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14449 states. [2021-03-11 00:34:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14449 to 8349. [2021-03-11 00:34:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 8348 states have (on average 3.7870148538572113) internal successors, (31614), 8348 states have internal predecessors, (31614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 31614 transitions. [2021-03-11 00:34:49,794 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 31614 transitions. Word has length 28 [2021-03-11 00:34:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:49,794 INFO L480 AbstractCegarLoop]: Abstraction has 8349 states and 31614 transitions. [2021-03-11 00:34:49,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 31614 transitions. [2021-03-11 00:34:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:49,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:49,813 INFO L519 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] [2021-03-11 00:34:50,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:34:50,014 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:50,014 INFO L82 PathProgramCache]: Analyzing trace with hash 970254134, now seen corresponding path program 90 times [2021-03-11 00:34:50,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:50,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136622994] [2021-03-11 00:34:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136622994] [2021-03-11 00:34:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121827778] [2021-03-11 00:34:50,148 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 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 [2021-03-11 00:34:50,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:34:50,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:34:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:50,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:50,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:34:50,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858563921] [2021-03-11 00:34:50,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:34:50,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:34:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:34:50,499 INFO L87 Difference]: Start difference. First operand 8349 states and 31614 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) [2021-03-11 00:34:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:52,146 INFO L93 Difference]: Finished difference Result 10938 states and 39433 transitions. [2021-03-11 00:34:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:34:52,150 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 [2021-03-11 00:34:52,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:52,184 INFO L225 Difference]: With dead ends: 10938 [2021-03-11 00:34:52,184 INFO L226 Difference]: Without dead ends: 10938 [2021-03-11 00:34:52,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 958.8ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:34:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10938 states. [2021-03-11 00:34:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10938 to 8295. [2021-03-11 00:34:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780564263322884) internal successors, (31356), 8294 states have internal predecessors, (31356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31356 transitions. [2021-03-11 00:34:52,500 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31356 transitions. Word has length 28 [2021-03-11 00:34:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:52,500 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31356 transitions. [2021-03-11 00:34:52,500 INFO L481 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) [2021-03-11 00:34:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31356 transitions. [2021-03-11 00:34:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:52,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:52,518 INFO L519 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] [2021-03-11 00:34:52,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-03-11 00:34:52,719 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:52,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1831555688, now seen corresponding path program 91 times [2021-03-11 00:34:52,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:52,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968238085] [2021-03-11 00:34:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:52,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968238085] [2021-03-11 00:34:52,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118775528] [2021-03-11 00:34:52,872 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 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 [2021-03-11 00:34:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:52,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:52,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:53,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:53,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:34:53,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060212029] [2021-03-11 00:34:53,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:34:53,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:53,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:34:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:34:53,199 INFO L87 Difference]: Start difference. First operand 8295 states and 31356 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) [2021-03-11 00:34:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:34:55,868 INFO L93 Difference]: Finished difference Result 14334 states and 50973 transitions. [2021-03-11 00:34:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:34:55,872 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 [2021-03-11 00:34:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:34:55,920 INFO L225 Difference]: With dead ends: 14334 [2021-03-11 00:34:55,920 INFO L226 Difference]: Without dead ends: 14322 [2021-03-11 00:34:55,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1538.7ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:34:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14322 states. [2021-03-11 00:34:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14322 to 8295. [2021-03-11 00:34:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8295 states, 8294 states have (on average 3.780081986978539) internal successors, (31352), 8294 states have internal predecessors, (31352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:34:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8295 states to 8295 states and 31352 transitions. [2021-03-11 00:34:56,212 INFO L78 Accepts]: Start accepts. Automaton has 8295 states and 31352 transitions. Word has length 28 [2021-03-11 00:34:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:34:56,212 INFO L480 AbstractCegarLoop]: Abstraction has 8295 states and 31352 transitions. [2021-03-11 00:34:56,212 INFO L481 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) [2021-03-11 00:34:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8295 states and 31352 transitions. [2021-03-11 00:34:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:34:56,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:34:56,231 INFO L519 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] [2021-03-11 00:34:56,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-03-11 00:34:56,431 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:34:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:34:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash 695130692, now seen corresponding path program 92 times [2021-03-11 00:34:56,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:34:56,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399758879] [2021-03-11 00:34:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:34:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:34:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:56,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399758879] [2021-03-11 00:34:56,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514567484] [2021-03-11 00:34:56,589 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 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 [2021-03-11 00:34:56,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:34:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:34:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:34:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:34:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:34:56,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:34:56,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:34:56,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242795444] [2021-03-11 00:34:56,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:34:56,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:34:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:34:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:34:56,980 INFO L87 Difference]: Start difference. First operand 8295 states and 31352 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) [2021-03-11 00:35:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:01,327 INFO L93 Difference]: Finished difference Result 22194 states and 77568 transitions. [2021-03-11 00:35:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-03-11 00:35:01,327 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 [2021-03-11 00:35:01,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:01,394 INFO L225 Difference]: With dead ends: 22194 [2021-03-11 00:35:01,394 INFO L226 Difference]: Without dead ends: 22194 [2021-03-11 00:35:01,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2739.4ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-03-11 00:35:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22194 states. [2021-03-11 00:35:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22194 to 11506. [2021-03-11 00:35:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11506 states, 11505 states have (on average 3.8243372446762276) internal successors, (43999), 11505 states have internal predecessors, (43999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11506 states to 11506 states and 43999 transitions. [2021-03-11 00:35:01,939 INFO L78 Accepts]: Start accepts. Automaton has 11506 states and 43999 transitions. Word has length 28 [2021-03-11 00:35:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:01,939 INFO L480 AbstractCegarLoop]: Abstraction has 11506 states and 43999 transitions. [2021-03-11 00:35:01,939 INFO L481 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) [2021-03-11 00:35:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 11506 states and 43999 transitions. [2021-03-11 00:35:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:01,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:01,967 INFO L519 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] [2021-03-11 00:35:02,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-03-11 00:35:02,168 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:02,169 INFO L82 PathProgramCache]: Analyzing trace with hash 776506780, now seen corresponding path program 93 times [2021-03-11 00:35:02,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:02,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012023717] [2021-03-11 00:35:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:02,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012023717] [2021-03-11 00:35:02,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123105512] [2021-03-11 00:35:02,353 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 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 [2021-03-11 00:35:02,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:35:02,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:02,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:02,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:35:02,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750783662] [2021-03-11 00:35:02,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:35:02,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:35:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:35:02,797 INFO L87 Difference]: Start difference. First operand 11506 states and 43999 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) [2021-03-11 00:35:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:07,098 INFO L93 Difference]: Finished difference Result 21305 states and 75279 transitions. [2021-03-11 00:35:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:35:07,100 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 [2021-03-11 00:35:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:07,169 INFO L225 Difference]: With dead ends: 21305 [2021-03-11 00:35:07,170 INFO L226 Difference]: Without dead ends: 21293 [2021-03-11 00:35:07,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2668.5ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:35:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21293 states. [2021-03-11 00:35:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21293 to 11322. [2021-03-11 00:35:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11321 states have (on average 3.8303153431675647) internal successors, (43363), 11321 states have internal predecessors, (43363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 43363 transitions. [2021-03-11 00:35:07,725 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 43363 transitions. Word has length 28 [2021-03-11 00:35:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:07,726 INFO L480 AbstractCegarLoop]: Abstraction has 11322 states and 43363 transitions. [2021-03-11 00:35:07,726 INFO L481 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) [2021-03-11 00:35:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 43363 transitions. [2021-03-11 00:35:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:07,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:07,752 INFO L519 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] [2021-03-11 00:35:07,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:07,952 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash -738585192, now seen corresponding path program 94 times [2021-03-11 00:35:07,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:07,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226374316] [2021-03-11 00:35:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:08,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226374316] [2021-03-11 00:35:08,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030754978] [2021-03-11 00:35:08,113 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 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 [2021-03-11 00:35:08,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:35:08,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:08,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:08,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:08,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:08,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:35:08,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179550041] [2021-03-11 00:35:08,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:35:08,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:08,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:35:08,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:35:08,483 INFO L87 Difference]: Start difference. First operand 11322 states and 43363 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) [2021-03-11 00:35:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:11,313 INFO L93 Difference]: Finished difference Result 21173 states and 74684 transitions. [2021-03-11 00:35:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:35:11,315 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 [2021-03-11 00:35:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:11,359 INFO L225 Difference]: With dead ends: 21173 [2021-03-11 00:35:11,359 INFO L226 Difference]: Without dead ends: 21137 [2021-03-11 00:35:11,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1709.7ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:35:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21137 states. [2021-03-11 00:35:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21137 to 11370. [2021-03-11 00:35:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11369 states have (on average 3.829624417275046) internal successors, (43539), 11369 states have internal predecessors, (43539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 43539 transitions. [2021-03-11 00:35:11,700 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 43539 transitions. Word has length 28 [2021-03-11 00:35:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:11,700 INFO L480 AbstractCegarLoop]: Abstraction has 11370 states and 43539 transitions. [2021-03-11 00:35:11,700 INFO L481 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) [2021-03-11 00:35:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 43539 transitions. [2021-03-11 00:35:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:11,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:11,718 INFO L519 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] [2021-03-11 00:35:11,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-03-11 00:35:11,919 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash 858541524, now seen corresponding path program 95 times [2021-03-11 00:35:11,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:11,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179411450] [2021-03-11 00:35:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:12,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179411450] [2021-03-11 00:35:12,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283533900] [2021-03-11 00:35:12,114 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 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 [2021-03-11 00:35:12,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:35:12,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:12,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:12,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:12,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:12,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:35:12,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648463298] [2021-03-11 00:35:12,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:35:12,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:35:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:35:12,646 INFO L87 Difference]: Start difference. First operand 11370 states and 43539 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) [2021-03-11 00:35:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:18,007 INFO L93 Difference]: Finished difference Result 20914 states and 74023 transitions. [2021-03-11 00:35:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-03-11 00:35:18,007 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 [2021-03-11 00:35:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:18,070 INFO L225 Difference]: With dead ends: 20914 [2021-03-11 00:35:18,070 INFO L226 Difference]: Without dead ends: 20914 [2021-03-11 00:35:18,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 3439.9ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:35:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20914 states. [2021-03-11 00:35:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20914 to 11566. [2021-03-11 00:35:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11566 states, 11565 states have (on average 3.820925205361003) internal successors, (44189), 11565 states have internal predecessors, (44189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11566 states to 11566 states and 44189 transitions. [2021-03-11 00:35:18,487 INFO L78 Accepts]: Start accepts. Automaton has 11566 states and 44189 transitions. Word has length 28 [2021-03-11 00:35:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:18,487 INFO L480 AbstractCegarLoop]: Abstraction has 11566 states and 44189 transitions. [2021-03-11 00:35:18,487 INFO L481 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) [2021-03-11 00:35:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 11566 states and 44189 transitions. [2021-03-11 00:35:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:18,511 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:18,511 INFO L519 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] [2021-03-11 00:35:18,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:18,712 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1793386618, now seen corresponding path program 96 times [2021-03-11 00:35:18,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:18,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126830444] [2021-03-11 00:35:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:18,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126830444] [2021-03-11 00:35:18,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618353406] [2021-03-11 00:35:18,882 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:35:18,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:35:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:18,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:19,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:19,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:35:19,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112974682] [2021-03-11 00:35:19,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:35:19,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:19,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:35:19,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:35:19,346 INFO L87 Difference]: Start difference. First operand 11566 states and 44189 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) [2021-03-11 00:35:24,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:24,088 INFO L93 Difference]: Finished difference Result 20375 states and 72554 transitions. [2021-03-11 00:35:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:35:24,091 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 [2021-03-11 00:35:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:24,154 INFO L225 Difference]: With dead ends: 20375 [2021-03-11 00:35:24,154 INFO L226 Difference]: Without dead ends: 20363 [2021-03-11 00:35:24,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2919.5ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-03-11 00:35:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20363 states. [2021-03-11 00:35:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20363 to 11444. [2021-03-11 00:35:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11444 states, 11443 states have (on average 3.82469632089487) internal successors, (43766), 11443 states have internal predecessors, (43766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11444 states to 11444 states and 43766 transitions. [2021-03-11 00:35:24,582 INFO L78 Accepts]: Start accepts. Automaton has 11444 states and 43766 transitions. Word has length 28 [2021-03-11 00:35:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:24,582 INFO L480 AbstractCegarLoop]: Abstraction has 11444 states and 43766 transitions. [2021-03-11 00:35:24,582 INFO L481 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) [2021-03-11 00:35:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 11444 states and 43766 transitions. [2021-03-11 00:35:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:24,604 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:24,604 INFO L519 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] [2021-03-11 00:35:24,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-03-11 00:35:24,805 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1234123500, now seen corresponding path program 97 times [2021-03-11 00:35:24,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:24,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296517694] [2021-03-11 00:35:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:24,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296517694] [2021-03-11 00:35:24,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371288765] [2021-03-11 00:35:24,958 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 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 [2021-03-11 00:35:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:25,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:25,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-03-11 00:35:25,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873939777] [2021-03-11 00:35:25,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:35:25,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:25,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:35:25,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:35:25,373 INFO L87 Difference]: Start difference. First operand 11444 states and 43766 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) [2021-03-11 00:35:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:29,087 INFO L93 Difference]: Finished difference Result 19613 states and 70459 transitions. [2021-03-11 00:35:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:35:29,089 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 [2021-03-11 00:35:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:29,135 INFO L225 Difference]: With dead ends: 19613 [2021-03-11 00:35:29,135 INFO L226 Difference]: Without dead ends: 19577 [2021-03-11 00:35:29,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 2350.0ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:35:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19577 states. [2021-03-11 00:35:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19577 to 11468. [2021-03-11 00:35:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11468 states, 11467 states have (on average 3.8236679166303307) internal successors, (43846), 11467 states have internal predecessors, (43846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11468 states to 11468 states and 43846 transitions. [2021-03-11 00:35:29,603 INFO L78 Accepts]: Start accepts. Automaton has 11468 states and 43846 transitions. Word has length 28 [2021-03-11 00:35:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:29,603 INFO L480 AbstractCegarLoop]: Abstraction has 11468 states and 43846 transitions. [2021-03-11 00:35:29,603 INFO L481 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) [2021-03-11 00:35:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 11468 states and 43846 transitions. [2021-03-11 00:35:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:29,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:29,621 INFO L519 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] [2021-03-11 00:35:29,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:29,822 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1584729920, now seen corresponding path program 98 times [2021-03-11 00:35:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:29,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235793774] [2021-03-11 00:35:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:35:29,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235793774] [2021-03-11 00:35:29,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400075217] [2021-03-11 00:35:29,892 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 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 [2021-03-11 00:35:29,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:35:29,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:30,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:30,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:35:30,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479874838] [2021-03-11 00:35:30,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:35:30,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:30,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:35:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:35:30,160 INFO L87 Difference]: Start difference. First operand 11468 states and 43846 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) [2021-03-11 00:35:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:33,964 INFO L93 Difference]: Finished difference Result 28622 states and 102312 transitions. [2021-03-11 00:35:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-03-11 00:35:33,967 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 [2021-03-11 00:35:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:34,063 INFO L225 Difference]: With dead ends: 28622 [2021-03-11 00:35:34,063 INFO L226 Difference]: Without dead ends: 28622 [2021-03-11 00:35:34,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 2271.6ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-03-11 00:35:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28622 states. [2021-03-11 00:35:34,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28622 to 11820. [2021-03-11 00:35:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11820 states, 11819 states have (on average 3.8508334038412726) internal successors, (45513), 11819 states have internal predecessors, (45513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11820 states to 11820 states and 45513 transitions. [2021-03-11 00:35:34,706 INFO L78 Accepts]: Start accepts. Automaton has 11820 states and 45513 transitions. Word has length 28 [2021-03-11 00:35:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:34,706 INFO L480 AbstractCegarLoop]: Abstraction has 11820 states and 45513 transitions. [2021-03-11 00:35:34,706 INFO L481 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) [2021-03-11 00:35:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 11820 states and 45513 transitions. [2021-03-11 00:35:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:34,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:34,734 INFO L519 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] [2021-03-11 00:35:34,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable406 [2021-03-11 00:35:34,934 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1017777840, now seen corresponding path program 99 times [2021-03-11 00:35:34,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:34,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925084144] [2021-03-11 00:35:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:35:35,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925084144] [2021-03-11 00:35:35,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915644516] [2021-03-11 00:35:35,139 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 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 [2021-03-11 00:35:35,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:35:35,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:35,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:35,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:35:35,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536504549] [2021-03-11 00:35:35,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:35:35,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:35,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:35:35,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:35:35,684 INFO L87 Difference]: Start difference. First operand 11820 states and 45513 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) [2021-03-11 00:35:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:40,478 INFO L93 Difference]: Finished difference Result 28081 states and 101108 transitions. [2021-03-11 00:35:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-03-11 00:35:40,482 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 [2021-03-11 00:35:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:40,589 INFO L225 Difference]: With dead ends: 28081 [2021-03-11 00:35:40,589 INFO L226 Difference]: Without dead ends: 28081 [2021-03-11 00:35:40,589 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 3184.1ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-03-11 00:35:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28081 states. [2021-03-11 00:35:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28081 to 11710. [2021-03-11 00:35:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11710 states, 11709 states have (on average 3.838244085746007) internal successors, (44942), 11709 states have internal predecessors, (44942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11710 states to 11710 states and 44942 transitions. [2021-03-11 00:35:41,215 INFO L78 Accepts]: Start accepts. Automaton has 11710 states and 44942 transitions. Word has length 28 [2021-03-11 00:35:41,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:41,215 INFO L480 AbstractCegarLoop]: Abstraction has 11710 states and 44942 transitions. [2021-03-11 00:35:41,215 INFO L481 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) [2021-03-11 00:35:41,215 INFO L276 IsEmpty]: Start isEmpty. Operand 11710 states and 44942 transitions. [2021-03-11 00:35:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:41,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:41,244 INFO L519 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] [2021-03-11 00:35:41,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:41,444 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:41,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1216329654, now seen corresponding path program 100 times [2021-03-11 00:35:41,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:41,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813161084] [2021-03-11 00:35:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:35:41,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813161084] [2021-03-11 00:35:41,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864254750] [2021-03-11 00:35:41,591 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 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 [2021-03-11 00:35:41,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:35:41,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:41,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:42,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:42,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:35:42,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616702666] [2021-03-11 00:35:42,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:35:42,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:35:42,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:35:42,118 INFO L87 Difference]: Start difference. First operand 11710 states and 44942 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) [2021-03-11 00:35:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:45,794 INFO L93 Difference]: Finished difference Result 22237 states and 80394 transitions. [2021-03-11 00:35:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:35:45,797 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 [2021-03-11 00:35:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:45,867 INFO L225 Difference]: With dead ends: 22237 [2021-03-11 00:35:45,868 INFO L226 Difference]: Without dead ends: 22237 [2021-03-11 00:35:45,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2065.4ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:35:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22237 states. [2021-03-11 00:35:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22237 to 11719. [2021-03-11 00:35:46,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11719 states, 11718 states have (on average 3.8372589179040792) internal successors, (44965), 11718 states have internal predecessors, (44965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11719 states to 11719 states and 44965 transitions. [2021-03-11 00:35:46,282 INFO L78 Accepts]: Start accepts. Automaton has 11719 states and 44965 transitions. Word has length 28 [2021-03-11 00:35:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:46,282 INFO L480 AbstractCegarLoop]: Abstraction has 11719 states and 44965 transitions. [2021-03-11 00:35:46,282 INFO L481 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) [2021-03-11 00:35:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 11719 states and 44965 transitions. [2021-03-11 00:35:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:46,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:46,385 INFO L519 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] [2021-03-11 00:35:46,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:46,585 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:46,586 INFO L82 PathProgramCache]: Analyzing trace with hash 541607776, now seen corresponding path program 101 times [2021-03-11 00:35:46,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:46,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887805163] [2021-03-11 00:35:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:35:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887805163] [2021-03-11 00:35:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681632590] [2021-03-11 00:35:46,731 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 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 [2021-03-11 00:35:46,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:35:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:46,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:47,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:47,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:35:47,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094690415] [2021-03-11 00:35:47,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:35:47,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:47,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:35:47,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:35:47,243 INFO L87 Difference]: Start difference. First operand 11719 states and 44965 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) [2021-03-11 00:35:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:50,337 INFO L93 Difference]: Finished difference Result 20596 states and 75154 transitions. [2021-03-11 00:35:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:35:50,341 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 [2021-03-11 00:35:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:50,416 INFO L225 Difference]: With dead ends: 20596 [2021-03-11 00:35:50,416 INFO L226 Difference]: Without dead ends: 20596 [2021-03-11 00:35:50,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1841.7ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:35:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20596 states. [2021-03-11 00:35:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20596 to 11731. [2021-03-11 00:35:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11731 states, 11730 states have (on average 3.8365728900255753) internal successors, (45003), 11730 states have internal predecessors, (45003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11731 states to 11731 states and 45003 transitions. [2021-03-11 00:35:50,924 INFO L78 Accepts]: Start accepts. Automaton has 11731 states and 45003 transitions. Word has length 28 [2021-03-11 00:35:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:50,924 INFO L480 AbstractCegarLoop]: Abstraction has 11731 states and 45003 transitions. [2021-03-11 00:35:50,924 INFO L481 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) [2021-03-11 00:35:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 11731 states and 45003 transitions. [2021-03-11 00:35:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:50,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:50,951 INFO L519 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] [2021-03-11 00:35:51,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:35:51,152 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2099999344, now seen corresponding path program 102 times [2021-03-11 00:35:51,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:51,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617876130] [2021-03-11 00:35:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:35:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617876130] [2021-03-11 00:35:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732640528] [2021-03-11 00:35:51,306 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 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 [2021-03-11 00:35:51,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:35:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:35:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:51,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:51,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:35:51,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113722255] [2021-03-11 00:35:51,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:35:51,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:35:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:35:51,883 INFO L87 Difference]: Start difference. First operand 11731 states and 45003 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) [2021-03-11 00:35:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:35:56,358 INFO L93 Difference]: Finished difference Result 21379 states and 77391 transitions. [2021-03-11 00:35:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-03-11 00:35:56,360 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 [2021-03-11 00:35:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:35:56,434 INFO L225 Difference]: With dead ends: 21379 [2021-03-11 00:35:56,434 INFO L226 Difference]: Without dead ends: 21379 [2021-03-11 00:35:56,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 2973.7ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-03-11 00:35:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2021-03-11 00:35:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 11839. [2021-03-11 00:35:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11839 states, 11838 states have (on average 3.829785436729177) internal successors, (45337), 11838 states have internal predecessors, (45337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:35:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11839 states to 11839 states and 45337 transitions. [2021-03-11 00:35:56,896 INFO L78 Accepts]: Start accepts. Automaton has 11839 states and 45337 transitions. Word has length 28 [2021-03-11 00:35:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:35:56,896 INFO L480 AbstractCegarLoop]: Abstraction has 11839 states and 45337 transitions. [2021-03-11 00:35:56,896 INFO L481 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) [2021-03-11 00:35:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 11839 states and 45337 transitions. [2021-03-11 00:35:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:35:56,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:35:56,922 INFO L519 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] [2021-03-11 00:35:57,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-03-11 00:35:57,123 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:35:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:35:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash -456960190, now seen corresponding path program 103 times [2021-03-11 00:35:57,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:35:57,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909496553] [2021-03-11 00:35:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:35:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:35:57,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909496553] [2021-03-11 00:35:57,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143246770] [2021-03-11 00:35:57,253 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 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 [2021-03-11 00:35:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:35:57,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:35:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:35:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:35:57,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:35:57,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:35:57,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867985349] [2021-03-11 00:35:57,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:35:57,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:35:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:35:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:35:57,759 INFO L87 Difference]: Start difference. First operand 11839 states and 45337 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) [2021-03-11 00:36:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:00,019 INFO L93 Difference]: Finished difference Result 20760 states and 75687 transitions. [2021-03-11 00:36:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:36:00,021 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 [2021-03-11 00:36:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:00,067 INFO L225 Difference]: With dead ends: 20760 [2021-03-11 00:36:00,068 INFO L226 Difference]: Without dead ends: 20756 [2021-03-11 00:36:00,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1490.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:36:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20756 states. [2021-03-11 00:36:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20756 to 11765. [2021-03-11 00:36:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11765 states, 11764 states have (on average 3.833560013600816) internal successors, (45098), 11764 states have internal predecessors, (45098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11765 states to 11765 states and 45098 transitions. [2021-03-11 00:36:00,379 INFO L78 Accepts]: Start accepts. Automaton has 11765 states and 45098 transitions. Word has length 28 [2021-03-11 00:36:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:00,380 INFO L480 AbstractCegarLoop]: Abstraction has 11765 states and 45098 transitions. [2021-03-11 00:36:00,380 INFO L481 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) [2021-03-11 00:36:00,380 INFO L276 IsEmpty]: Start isEmpty. Operand 11765 states and 45098 transitions. [2021-03-11 00:36:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:00,407 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:00,407 INFO L519 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] [2021-03-11 00:36:00,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-03-11 00:36:00,607 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1748478926, now seen corresponding path program 104 times [2021-03-11 00:36:00,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:00,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941784269] [2021-03-11 00:36:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941784269] [2021-03-11 00:36:00,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039576590] [2021-03-11 00:36:00,787 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 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 [2021-03-11 00:36:00,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:00,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:00,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:01,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:01,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:36:01,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981882269] [2021-03-11 00:36:01,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:36:01,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:01,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:36:01,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:36:01,434 INFO L87 Difference]: Start difference. First operand 11765 states and 45098 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) [2021-03-11 00:36:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:05,904 INFO L93 Difference]: Finished difference Result 20065 states and 72452 transitions. [2021-03-11 00:36:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-11 00:36:05,908 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 [2021-03-11 00:36:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:05,974 INFO L225 Difference]: With dead ends: 20065 [2021-03-11 00:36:05,974 INFO L226 Difference]: Without dead ends: 20065 [2021-03-11 00:36:05,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 2888.1ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:36:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20065 states. [2021-03-11 00:36:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20065 to 11992. [2021-03-11 00:36:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11992 states, 11991 states have (on average 3.8358769076807606) internal successors, (45996), 11991 states have internal predecessors, (45996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11992 states to 11992 states and 45996 transitions. [2021-03-11 00:36:06,393 INFO L78 Accepts]: Start accepts. Automaton has 11992 states and 45996 transitions. Word has length 28 [2021-03-11 00:36:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:06,394 INFO L480 AbstractCegarLoop]: Abstraction has 11992 states and 45996 transitions. [2021-03-11 00:36:06,394 INFO L481 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) [2021-03-11 00:36:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 11992 states and 45996 transitions. [2021-03-11 00:36:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:06,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:06,414 INFO L519 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] [2021-03-11 00:36:06,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:06,614 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1366168690, now seen corresponding path program 105 times [2021-03-11 00:36:06,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:06,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293693244] [2021-03-11 00:36:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:06,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293693244] [2021-03-11 00:36:06,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903283437] [2021-03-11 00:36:06,773 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 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 [2021-03-11 00:36:06,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:36:06,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:06,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:07,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:07,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:36:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667984203] [2021-03-11 00:36:07,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:36:07,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:07,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:36:07,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:36:07,230 INFO L87 Difference]: Start difference. First operand 11992 states and 45996 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) [2021-03-11 00:36:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:10,897 INFO L93 Difference]: Finished difference Result 19596 states and 71161 transitions. [2021-03-11 00:36:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:36:10,900 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 [2021-03-11 00:36:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:10,964 INFO L225 Difference]: With dead ends: 19596 [2021-03-11 00:36:10,964 INFO L226 Difference]: Without dead ends: 19584 [2021-03-11 00:36:10,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2447.1ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:36:10,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19584 states. [2021-03-11 00:36:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19584 to 12094. [2021-03-11 00:36:11,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12094 states, 12093 states have (on average 3.8302323658314728) internal successors, (46319), 12093 states have internal predecessors, (46319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12094 states to 12094 states and 46319 transitions. [2021-03-11 00:36:11,398 INFO L78 Accepts]: Start accepts. Automaton has 12094 states and 46319 transitions. Word has length 28 [2021-03-11 00:36:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:11,399 INFO L480 AbstractCegarLoop]: Abstraction has 12094 states and 46319 transitions. [2021-03-11 00:36:11,399 INFO L481 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) [2021-03-11 00:36:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 12094 states and 46319 transitions. [2021-03-11 00:36:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:11,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:11,426 INFO L519 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] [2021-03-11 00:36:11,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-03-11 00:36:11,626 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:11,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1561241668, now seen corresponding path program 73 times [2021-03-11 00:36:11,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:11,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695153079] [2021-03-11 00:36:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695153079] [2021-03-11 00:36:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879152391] [2021-03-11 00:36:11,790 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 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 [2021-03-11 00:36:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:11,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:12,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:12,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:36:12,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860678194] [2021-03-11 00:36:12,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:36:12,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:36:12,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:12,164 INFO L87 Difference]: Start difference. First operand 12094 states and 46319 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) [2021-03-11 00:36:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:13,856 INFO L93 Difference]: Finished difference Result 17012 states and 63246 transitions. [2021-03-11 00:36:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:36:13,860 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 [2021-03-11 00:36:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:13,913 INFO L225 Difference]: With dead ends: 17012 [2021-03-11 00:36:13,913 INFO L226 Difference]: Without dead ends: 17012 [2021-03-11 00:36:13,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1037.6ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:36:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17012 states. [2021-03-11 00:36:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17012 to 12166. [2021-03-11 00:36:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.8256473489519114) internal successors, (46539), 12165 states have internal predecessors, (46539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 46539 transitions. [2021-03-11 00:36:14,273 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 46539 transitions. Word has length 28 [2021-03-11 00:36:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:14,274 INFO L480 AbstractCegarLoop]: Abstraction has 12166 states and 46539 transitions. [2021-03-11 00:36:14,274 INFO L481 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) [2021-03-11 00:36:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 46539 transitions. [2021-03-11 00:36:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:14,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:14,300 INFO L519 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] [2021-03-11 00:36:14,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:14,501 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash 149924120, now seen corresponding path program 74 times [2021-03-11 00:36:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084075802] [2021-03-11 00:36:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:36:14,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084075802] [2021-03-11 00:36:14,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007903320] [2021-03-11 00:36:14,647 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 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 [2021-03-11 00:36:14,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:14,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:15,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:15,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-11 00:36:15,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108592636] [2021-03-11 00:36:15,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:36:15,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:15,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:36:15,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:36:15,179 INFO L87 Difference]: Start difference. First operand 12166 states and 46539 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) [2021-03-11 00:36:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:16,849 INFO L93 Difference]: Finished difference Result 15303 states and 56668 transitions. [2021-03-11 00:36:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:36:16,853 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 [2021-03-11 00:36:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:16,905 INFO L225 Difference]: With dead ends: 15303 [2021-03-11 00:36:16,905 INFO L226 Difference]: Without dead ends: 15252 [2021-03-11 00:36:16,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1290.6ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:36:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15252 states. [2021-03-11 00:36:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15252 to 11807. [2021-03-11 00:36:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11807 states, 11806 states have (on average 3.8175503981026595) internal successors, (45070), 11806 states have internal predecessors, (45070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11807 states to 11807 states and 45070 transitions. [2021-03-11 00:36:17,295 INFO L78 Accepts]: Start accepts. Automaton has 11807 states and 45070 transitions. Word has length 28 [2021-03-11 00:36:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:17,295 INFO L480 AbstractCegarLoop]: Abstraction has 11807 states and 45070 transitions. [2021-03-11 00:36:17,295 INFO L481 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) [2021-03-11 00:36:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 11807 states and 45070 transitions. [2021-03-11 00:36:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:17,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:17,323 INFO L519 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] [2021-03-11 00:36:17,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:17,523 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 963219036, now seen corresponding path program 75 times [2021-03-11 00:36:17,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:17,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915351251] [2021-03-11 00:36:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:17,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915351251] [2021-03-11 00:36:17,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26548878] [2021-03-11 00:36:17,670 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 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 [2021-03-11 00:36:17,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:36:17,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:17,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:18,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:18,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:36:18,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097842035] [2021-03-11 00:36:18,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:36:18,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:18,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:36:18,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:36:18,067 INFO L87 Difference]: Start difference. First operand 11807 states and 45070 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) [2021-03-11 00:36:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:20,064 INFO L93 Difference]: Finished difference Result 17683 states and 64727 transitions. [2021-03-11 00:36:20,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:36:20,067 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 [2021-03-11 00:36:20,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:20,126 INFO L225 Difference]: With dead ends: 17683 [2021-03-11 00:36:20,127 INFO L226 Difference]: Without dead ends: 17683 [2021-03-11 00:36:20,127 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1278.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:36:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17683 states. [2021-03-11 00:36:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17683 to 12145. [2021-03-11 00:36:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12145 states, 12144 states have (on average 3.799324769433465) internal successors, (46139), 12144 states have internal predecessors, (46139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12145 states to 12145 states and 46139 transitions. [2021-03-11 00:36:20,514 INFO L78 Accepts]: Start accepts. Automaton has 12145 states and 46139 transitions. Word has length 28 [2021-03-11 00:36:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:20,514 INFO L480 AbstractCegarLoop]: Abstraction has 12145 states and 46139 transitions. [2021-03-11 00:36:20,514 INFO L481 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) [2021-03-11 00:36:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 12145 states and 46139 transitions. [2021-03-11 00:36:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:20,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:20,538 INFO L519 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] [2021-03-11 00:36:20,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:20,739 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash 918397894, now seen corresponding path program 76 times [2021-03-11 00:36:20,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:20,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982749161] [2021-03-11 00:36:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:36:20,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982749161] [2021-03-11 00:36:20,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850255555] [2021-03-11 00:36:20,892 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 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 [2021-03-11 00:36:20,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:36:20,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:20,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:20,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:21,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:36:21,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:21,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:36:21,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099490588] [2021-03-11 00:36:21,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:36:21,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:21,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:36:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:36:21,206 INFO L87 Difference]: Start difference. First operand 12145 states and 46139 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) [2021-03-11 00:36:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:22,882 INFO L93 Difference]: Finished difference Result 17151 states and 63339 transitions. [2021-03-11 00:36:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:36:22,885 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 [2021-03-11 00:36:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:22,937 INFO L225 Difference]: With dead ends: 17151 [2021-03-11 00:36:22,937 INFO L226 Difference]: Without dead ends: 17143 [2021-03-11 00:36:22,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1023.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:36:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17143 states. [2021-03-11 00:36:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17143 to 12085. [2021-03-11 00:36:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12085 states, 12084 states have (on average 3.8013075140681893) internal successors, (45935), 12084 states have internal predecessors, (45935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12085 states to 12085 states and 45935 transitions. [2021-03-11 00:36:23,310 INFO L78 Accepts]: Start accepts. Automaton has 12085 states and 45935 transitions. Word has length 28 [2021-03-11 00:36:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:23,310 INFO L480 AbstractCegarLoop]: Abstraction has 12085 states and 45935 transitions. [2021-03-11 00:36:23,310 INFO L481 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) [2021-03-11 00:36:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 12085 states and 45935 transitions. [2021-03-11 00:36:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:23,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:23,338 INFO L519 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] [2021-03-11 00:36:23,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:23,538 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:23,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1515734552, now seen corresponding path program 77 times [2021-03-11 00:36:23,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:23,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912907855] [2021-03-11 00:36:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:23,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912907855] [2021-03-11 00:36:23,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337609516] [2021-03-11 00:36:23,696 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 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 [2021-03-11 00:36:23,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:36:23,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:24,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:24,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:36:24,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253816065] [2021-03-11 00:36:24,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:36:24,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:36:24,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:24,041 INFO L87 Difference]: Start difference. First operand 12085 states and 45935 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) [2021-03-11 00:36:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:25,803 INFO L93 Difference]: Finished difference Result 17051 states and 63051 transitions. [2021-03-11 00:36:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:36:25,807 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 [2021-03-11 00:36:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:25,858 INFO L225 Difference]: With dead ends: 17051 [2021-03-11 00:36:25,858 INFO L226 Difference]: Without dead ends: 17039 [2021-03-11 00:36:25,858 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1039.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:36:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17039 states. [2021-03-11 00:36:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17039 to 12051. [2021-03-11 00:36:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12051 states, 12050 states have (on average 3.8034854771784232) internal successors, (45832), 12050 states have internal predecessors, (45832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12051 states to 12051 states and 45832 transitions. [2021-03-11 00:36:26,208 INFO L78 Accepts]: Start accepts. Automaton has 12051 states and 45832 transitions. Word has length 28 [2021-03-11 00:36:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:26,208 INFO L480 AbstractCegarLoop]: Abstraction has 12051 states and 45832 transitions. [2021-03-11 00:36:26,208 INFO L481 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) [2021-03-11 00:36:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 12051 states and 45832 transitions. [2021-03-11 00:36:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:26,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:26,234 INFO L519 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] [2021-03-11 00:36:26,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-03-11 00:36:26,434 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:26,435 INFO L82 PathProgramCache]: Analyzing trace with hash 860325080, now seen corresponding path program 78 times [2021-03-11 00:36:26,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:26,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049369164] [2021-03-11 00:36:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:36:26,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049369164] [2021-03-11 00:36:26,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867826747] [2021-03-11 00:36:26,570 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 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 [2021-03-11 00:36:26,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:36:26,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:26,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:27,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:27,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:36:27,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161660122] [2021-03-11 00:36:27,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:36:27,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:27,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:36:27,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:36:27,068 INFO L87 Difference]: Start difference. First operand 12051 states and 45832 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) [2021-03-11 00:36:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:30,601 INFO L93 Difference]: Finished difference Result 23232 states and 83078 transitions. [2021-03-11 00:36:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:36:30,605 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 [2021-03-11 00:36:30,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:30,672 INFO L225 Difference]: With dead ends: 23232 [2021-03-11 00:36:30,673 INFO L226 Difference]: Without dead ends: 23232 [2021-03-11 00:36:30,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2082.8ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:36:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23232 states. [2021-03-11 00:36:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23232 to 12031. [2021-03-11 00:36:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12031 states, 12030 states have (on average 3.8021612635078967) internal successors, (45740), 12030 states have internal predecessors, (45740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12031 states to 12031 states and 45740 transitions. [2021-03-11 00:36:31,080 INFO L78 Accepts]: Start accepts. Automaton has 12031 states and 45740 transitions. Word has length 28 [2021-03-11 00:36:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:31,080 INFO L480 AbstractCegarLoop]: Abstraction has 12031 states and 45740 transitions. [2021-03-11 00:36:31,081 INFO L481 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) [2021-03-11 00:36:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 12031 states and 45740 transitions. [2021-03-11 00:36:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:31,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:31,105 INFO L519 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] [2021-03-11 00:36:31,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:31,305 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:31,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1387096988, now seen corresponding path program 106 times [2021-03-11 00:36:31,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:31,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022001219] [2021-03-11 00:36:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:36:31,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022001219] [2021-03-11 00:36:31,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410678809] [2021-03-11 00:36:31,416 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 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 [2021-03-11 00:36:31,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:36:31,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:31,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:31,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:31,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:36:31,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385871686] [2021-03-11 00:36:31,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:36:31,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:31,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:36:31,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:36:31,888 INFO L87 Difference]: Start difference. First operand 12031 states and 45740 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) [2021-03-11 00:36:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:34,755 INFO L93 Difference]: Finished difference Result 19093 states and 69327 transitions. [2021-03-11 00:36:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:36:34,758 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 [2021-03-11 00:36:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:34,814 INFO L225 Difference]: With dead ends: 19093 [2021-03-11 00:36:34,814 INFO L226 Difference]: Without dead ends: 19080 [2021-03-11 00:36:34,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1571.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:36:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19080 states. [2021-03-11 00:36:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19080 to 13545. [2021-03-11 00:36:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13545 states, 13544 states have (on average 3.87322799763733) internal successors, (52459), 13544 states have internal predecessors, (52459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13545 states to 13545 states and 52459 transitions. [2021-03-11 00:36:35,283 INFO L78 Accepts]: Start accepts. Automaton has 13545 states and 52459 transitions. Word has length 28 [2021-03-11 00:36:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:35,283 INFO L480 AbstractCegarLoop]: Abstraction has 13545 states and 52459 transitions. [2021-03-11 00:36:35,283 INFO L481 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) [2021-03-11 00:36:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 13545 states and 52459 transitions. [2021-03-11 00:36:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:35,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:35,312 INFO L519 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] [2021-03-11 00:36:35,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-03-11 00:36:35,512 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:35,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2059509770, now seen corresponding path program 107 times [2021-03-11 00:36:35,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:35,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348799093] [2021-03-11 00:36:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:36:35,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348799093] [2021-03-11 00:36:35,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925730455] [2021-03-11 00:36:35,618 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 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 [2021-03-11 00:36:35,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:36:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:36,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:36,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:36:36,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855229086] [2021-03-11 00:36:36,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:36:36,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:36,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:36:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:36:36,073 INFO L87 Difference]: Start difference. First operand 13545 states and 52459 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) [2021-03-11 00:36:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:38,870 INFO L93 Difference]: Finished difference Result 19245 states and 69750 transitions. [2021-03-11 00:36:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:36:38,873 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 [2021-03-11 00:36:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:38,929 INFO L225 Difference]: With dead ends: 19245 [2021-03-11 00:36:38,929 INFO L226 Difference]: Without dead ends: 19230 [2021-03-11 00:36:38,929 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1718.7ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:36:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2021-03-11 00:36:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 13512. [2021-03-11 00:36:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13512 states, 13511 states have (on average 3.872030197616757) internal successors, (52315), 13511 states have internal predecessors, (52315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 52315 transitions. [2021-03-11 00:36:39,373 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 52315 transitions. Word has length 28 [2021-03-11 00:36:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:39,373 INFO L480 AbstractCegarLoop]: Abstraction has 13512 states and 52315 transitions. [2021-03-11 00:36:39,373 INFO L481 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) [2021-03-11 00:36:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 52315 transitions. [2021-03-11 00:36:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:39,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:39,403 INFO L519 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] [2021-03-11 00:36:39,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-03-11 00:36:39,603 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash 244170948, now seen corresponding path program 108 times [2021-03-11 00:36:39,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:39,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357254218] [2021-03-11 00:36:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:39,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357254218] [2021-03-11 00:36:39,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838081262] [2021-03-11 00:36:39,708 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 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 [2021-03-11 00:36:39,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:36:39,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:39,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:40,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:40,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:36:40,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296480707] [2021-03-11 00:36:40,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:36:40,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:36:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:40,135 INFO L87 Difference]: Start difference. First operand 13512 states and 52315 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) [2021-03-11 00:36:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:42,294 INFO L93 Difference]: Finished difference Result 21572 states and 78297 transitions. [2021-03-11 00:36:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:36:42,296 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 [2021-03-11 00:36:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:42,339 INFO L225 Difference]: With dead ends: 21572 [2021-03-11 00:36:42,339 INFO L226 Difference]: Without dead ends: 21559 [2021-03-11 00:36:42,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1328.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:36:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21559 states. [2021-03-11 00:36:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21559 to 13594. [2021-03-11 00:36:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13594 states, 13593 states have (on average 3.877731185168837) internal successors, (52710), 13593 states have internal predecessors, (52710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13594 states to 13594 states and 52710 transitions. [2021-03-11 00:36:42,729 INFO L78 Accepts]: Start accepts. Automaton has 13594 states and 52710 transitions. Word has length 28 [2021-03-11 00:36:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:42,729 INFO L480 AbstractCegarLoop]: Abstraction has 13594 states and 52710 transitions. [2021-03-11 00:36:42,729 INFO L481 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) [2021-03-11 00:36:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13594 states and 52710 transitions. [2021-03-11 00:36:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:42,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:42,749 INFO L519 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] [2021-03-11 00:36:42,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-03-11 00:36:42,949 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash -438573382, now seen corresponding path program 109 times [2021-03-11 00:36:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:42,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7469453] [2021-03-11 00:36:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:43,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:43,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7469453] [2021-03-11 00:36:43,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910534954] [2021-03-11 00:36:43,012 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 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 [2021-03-11 00:36:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:43,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:43,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:43,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:36:43,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316050528] [2021-03-11 00:36:43,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:36:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:36:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:43,239 INFO L87 Difference]: Start difference. First operand 13594 states and 52710 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) [2021-03-11 00:36:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:44,870 INFO L93 Difference]: Finished difference Result 22871 states and 82348 transitions. [2021-03-11 00:36:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:36:44,872 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 [2021-03-11 00:36:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:44,920 INFO L225 Difference]: With dead ends: 22871 [2021-03-11 00:36:44,920 INFO L226 Difference]: Without dead ends: 22871 [2021-03-11 00:36:44,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 962.9ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:36:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2021-03-11 00:36:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 13618. [2021-03-11 00:36:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13618 states, 13617 states have (on average 3.8742748035543806) internal successors, (52756), 13617 states have internal predecessors, (52756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13618 states to 13618 states and 52756 transitions. [2021-03-11 00:36:45,295 INFO L78 Accepts]: Start accepts. Automaton has 13618 states and 52756 transitions. Word has length 28 [2021-03-11 00:36:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:45,295 INFO L480 AbstractCegarLoop]: Abstraction has 13618 states and 52756 transitions. [2021-03-11 00:36:45,295 INFO L481 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) [2021-03-11 00:36:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 13618 states and 52756 transitions. [2021-03-11 00:36:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:45,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:45,318 INFO L519 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] [2021-03-11 00:36:45,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-03-11 00:36:45,518 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:45,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:45,518 INFO L82 PathProgramCache]: Analyzing trace with hash -362417666, now seen corresponding path program 79 times [2021-03-11 00:36:45,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:45,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70400573] [2021-03-11 00:36:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:45,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70400573] [2021-03-11 00:36:45,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680819849] [2021-03-11 00:36:45,608 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 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 [2021-03-11 00:36:45,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:45,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:45,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:45,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:45,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:36:45,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536480723] [2021-03-11 00:36:45,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:36:45,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:45,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:36:45,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:36:45,881 INFO L87 Difference]: Start difference. First operand 13618 states and 52756 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) [2021-03-11 00:36:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:48,184 INFO L93 Difference]: Finished difference Result 23672 states and 87338 transitions. [2021-03-11 00:36:48,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-11 00:36:48,186 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 [2021-03-11 00:36:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:48,239 INFO L225 Difference]: With dead ends: 23672 [2021-03-11 00:36:48,239 INFO L226 Difference]: Without dead ends: 23668 [2021-03-11 00:36:48,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1439.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:36:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23668 states. [2021-03-11 00:36:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23668 to 13914. [2021-03-11 00:36:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13914 states, 13913 states have (on average 3.862718320994753) internal successors, (53742), 13913 states have internal predecessors, (53742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13914 states to 13914 states and 53742 transitions. [2021-03-11 00:36:48,668 INFO L78 Accepts]: Start accepts. Automaton has 13914 states and 53742 transitions. Word has length 28 [2021-03-11 00:36:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:48,668 INFO L480 AbstractCegarLoop]: Abstraction has 13914 states and 53742 transitions. [2021-03-11 00:36:48,668 INFO L481 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) [2021-03-11 00:36:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 13914 states and 53742 transitions. [2021-03-11 00:36:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:48,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:48,689 INFO L519 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] [2021-03-11 00:36:48,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:48,889 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:48,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:48,890 INFO L82 PathProgramCache]: Analyzing trace with hash 502966272, now seen corresponding path program 110 times [2021-03-11 00:36:48,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:48,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862289844] [2021-03-11 00:36:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:48,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862289844] [2021-03-11 00:36:48,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560156814] [2021-03-11 00:36:48,966 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 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 [2021-03-11 00:36:48,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:48,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:48,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:49,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:49,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:36:49,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982546095] [2021-03-11 00:36:49,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:36:49,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:36:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:49,217 INFO L87 Difference]: Start difference. First operand 13914 states and 53742 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) [2021-03-11 00:36:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:50,809 INFO L93 Difference]: Finished difference Result 20142 states and 74157 transitions. [2021-03-11 00:36:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:36:50,811 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 [2021-03-11 00:36:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:50,852 INFO L225 Difference]: With dead ends: 20142 [2021-03-11 00:36:50,852 INFO L226 Difference]: Without dead ends: 20119 [2021-03-11 00:36:50,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:36:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20119 states. [2021-03-11 00:36:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20119 to 13940. [2021-03-11 00:36:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13940 states, 13939 states have (on average 3.8696463160915417) internal successors, (53939), 13939 states have internal predecessors, (53939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13940 states to 13940 states and 53939 transitions. [2021-03-11 00:36:51,170 INFO L78 Accepts]: Start accepts. Automaton has 13940 states and 53939 transitions. Word has length 28 [2021-03-11 00:36:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:51,170 INFO L480 AbstractCegarLoop]: Abstraction has 13940 states and 53939 transitions. [2021-03-11 00:36:51,170 INFO L481 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) [2021-03-11 00:36:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 13940 states and 53939 transitions. [2021-03-11 00:36:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:51,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:51,192 INFO L519 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] [2021-03-11 00:36:51,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-03-11 00:36:51,393 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash -179778058, now seen corresponding path program 111 times [2021-03-11 00:36:51,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:51,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807032586] [2021-03-11 00:36:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:51,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807032586] [2021-03-11 00:36:51,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191389100] [2021-03-11 00:36:51,468 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 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 [2021-03-11 00:36:51,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:36:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:51,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:51,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:51,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:51,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:36:51,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001930471] [2021-03-11 00:36:51,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:36:51,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:36:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:51,720 INFO L87 Difference]: Start difference. First operand 13940 states and 53939 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) [2021-03-11 00:36:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:53,466 INFO L93 Difference]: Finished difference Result 19597 states and 71188 transitions. [2021-03-11 00:36:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:36:53,468 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 [2021-03-11 00:36:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:53,506 INFO L225 Difference]: With dead ends: 19597 [2021-03-11 00:36:53,506 INFO L226 Difference]: Without dead ends: 19597 [2021-03-11 00:36:53,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1058.6ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:36:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19597 states. [2021-03-11 00:36:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19597 to 13893. [2021-03-11 00:36:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13893 states, 13892 states have (on average 3.8620069104520587) internal successors, (53651), 13892 states have internal predecessors, (53651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13893 states to 13893 states and 53651 transitions. [2021-03-11 00:36:53,849 INFO L78 Accepts]: Start accepts. Automaton has 13893 states and 53651 transitions. Word has length 28 [2021-03-11 00:36:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:53,849 INFO L480 AbstractCegarLoop]: Abstraction has 13893 states and 53651 transitions. [2021-03-11 00:36:53,849 INFO L481 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) [2021-03-11 00:36:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 13893 states and 53651 transitions. [2021-03-11 00:36:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:53,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:53,870 INFO L519 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] [2021-03-11 00:36:54,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-03-11 00:36:54,075 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash -499896522, now seen corresponding path program 112 times [2021-03-11 00:36:54,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:54,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208608098] [2021-03-11 00:36:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208608098] [2021-03-11 00:36:54,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541233928] [2021-03-11 00:36:54,161 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 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 [2021-03-11 00:36:54,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:36:54,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:54,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:54,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:36:54,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885000971] [2021-03-11 00:36:54,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:36:54,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:36:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:36:54,456 INFO L87 Difference]: Start difference. First operand 13893 states and 53651 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) [2021-03-11 00:36:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:56,058 INFO L93 Difference]: Finished difference Result 20900 states and 76357 transitions. [2021-03-11 00:36:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:36:56,060 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 [2021-03-11 00:36:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:56,103 INFO L225 Difference]: With dead ends: 20900 [2021-03-11 00:36:56,103 INFO L226 Difference]: Without dead ends: 20900 [2021-03-11 00:36:56,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:36:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20900 states. [2021-03-11 00:36:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20900 to 14606. [2021-03-11 00:36:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 3.848134200616227) internal successors, (56202), 14605 states have internal predecessors, (56202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 56202 transitions. [2021-03-11 00:36:56,422 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 56202 transitions. Word has length 28 [2021-03-11 00:36:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:56,422 INFO L480 AbstractCegarLoop]: Abstraction has 14606 states and 56202 transitions. [2021-03-11 00:36:56,422 INFO L481 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) [2021-03-11 00:36:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 56202 transitions. [2021-03-11 00:36:56,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:56,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:56,446 INFO L519 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] [2021-03-11 00:36:56,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:36:56,647 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash 389506442, now seen corresponding path program 113 times [2021-03-11 00:36:56,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:56,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434695324] [2021-03-11 00:36:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434695324] [2021-03-11 00:36:56,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851305159] [2021-03-11 00:36:56,721 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 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 [2021-03-11 00:36:56,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:36:56,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:36:56,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:36:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:56,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:36:56,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:36:56,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485668344] [2021-03-11 00:36:56,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:36:56,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:36:56,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:36:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:36:56,971 INFO L87 Difference]: Start difference. First operand 14606 states and 56202 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) [2021-03-11 00:36:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:36:58,945 INFO L93 Difference]: Finished difference Result 23435 states and 84344 transitions. [2021-03-11 00:36:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:36:58,948 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 [2021-03-11 00:36:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:36:58,993 INFO L225 Difference]: With dead ends: 23435 [2021-03-11 00:36:58,993 INFO L226 Difference]: Without dead ends: 23435 [2021-03-11 00:36:58,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1167.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:36:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23435 states. [2021-03-11 00:36:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23435 to 14836. [2021-03-11 00:36:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 3.8591843613077184) internal successors, (57251), 14835 states have internal predecessors, (57251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:36:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 57251 transitions. [2021-03-11 00:36:59,388 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 57251 transitions. Word has length 28 [2021-03-11 00:36:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:36:59,388 INFO L480 AbstractCegarLoop]: Abstraction has 14836 states and 57251 transitions. [2021-03-11 00:36:59,388 INFO L481 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) [2021-03-11 00:36:59,388 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 57251 transitions. [2021-03-11 00:36:59,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:36:59,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:36:59,410 INFO L519 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] [2021-03-11 00:36:59,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-03-11 00:36:59,611 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:36:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:36:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash -933026596, now seen corresponding path program 80 times [2021-03-11 00:36:59,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:36:59,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916868713] [2021-03-11 00:36:59,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:36:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:36:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:36:59,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916868713] [2021-03-11 00:36:59,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929842627] [2021-03-11 00:36:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:36:59,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:36:59,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:36:59,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:36:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:00,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:00,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:37:00,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762443513] [2021-03-11 00:37:00,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:37:00,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:00,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:37:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:37:00,020 INFO L87 Difference]: Start difference. First operand 14836 states and 57251 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) [2021-03-11 00:37:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:03,447 INFO L93 Difference]: Finished difference Result 41598 states and 149527 transitions. [2021-03-11 00:37:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:37:03,447 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 [2021-03-11 00:37:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:03,538 INFO L225 Difference]: With dead ends: 41598 [2021-03-11 00:37:03,538 INFO L226 Difference]: Without dead ends: 41598 [2021-03-11 00:37:03,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 2205.0ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:37:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41598 states. [2021-03-11 00:37:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41598 to 16192. [2021-03-11 00:37:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16192 states, 16191 states have (on average 3.905564819961707) internal successors, (63235), 16191 states have internal predecessors, (63235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16192 states to 16192 states and 63235 transitions. [2021-03-11 00:37:04,280 INFO L78 Accepts]: Start accepts. Automaton has 16192 states and 63235 transitions. Word has length 28 [2021-03-11 00:37:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:04,280 INFO L480 AbstractCegarLoop]: Abstraction has 16192 states and 63235 transitions. [2021-03-11 00:37:04,280 INFO L481 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) [2021-03-11 00:37:04,280 INFO L276 IsEmpty]: Start isEmpty. Operand 16192 states and 63235 transitions. [2021-03-11 00:37:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:04,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:04,314 INFO L519 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] [2021-03-11 00:37:04,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:04,514 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:04,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:04,515 INFO L82 PathProgramCache]: Analyzing trace with hash -366074516, now seen corresponding path program 81 times [2021-03-11 00:37:04,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:04,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407265200] [2021-03-11 00:37:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:04,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407265200] [2021-03-11 00:37:04,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469818895] [2021-03-11 00:37:04,599 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 [2021-03-11 00:37:04,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:37:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:04,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:04,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:37:04,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369364775] [2021-03-11 00:37:04,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:37:04,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:04,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:37:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:37:04,929 INFO L87 Difference]: Start difference. First operand 16192 states and 63235 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) [2021-03-11 00:37:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:08,428 INFO L93 Difference]: Finished difference Result 40544 states and 146786 transitions. [2021-03-11 00:37:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:37:08,429 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 [2021-03-11 00:37:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:08,517 INFO L225 Difference]: With dead ends: 40544 [2021-03-11 00:37:08,517 INFO L226 Difference]: Without dead ends: 40544 [2021-03-11 00:37:08,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 2265.4ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-03-11 00:37:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40544 states. [2021-03-11 00:37:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40544 to 16160. [2021-03-11 00:37:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16160 states, 16159 states have (on average 3.9019122470449905) internal successors, (63051), 16159 states have internal predecessors, (63051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:09,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16160 states to 16160 states and 63051 transitions. [2021-03-11 00:37:09,064 INFO L78 Accepts]: Start accepts. Automaton has 16160 states and 63051 transitions. Word has length 28 [2021-03-11 00:37:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:09,064 INFO L480 AbstractCegarLoop]: Abstraction has 16160 states and 63051 transitions. [2021-03-11 00:37:09,064 INFO L481 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) [2021-03-11 00:37:09,064 INFO L276 IsEmpty]: Start isEmpty. Operand 16160 states and 63051 transitions. [2021-03-11 00:37:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:09,087 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:09,087 INFO L519 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] [2021-03-11 00:37:09,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-11 00:37:09,288 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash -648300864, now seen corresponding path program 114 times [2021-03-11 00:37:09,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:09,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718873882] [2021-03-11 00:37:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718873882] [2021-03-11 00:37:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609580005] [2021-03-11 00:37:09,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:37:09,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:37:09,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:09,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:37:09,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:09,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:09,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:37:09,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308028116] [2021-03-11 00:37:09,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:37:09,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:37:09,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:37:09,590 INFO L87 Difference]: Start difference. First operand 16160 states and 63051 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) [2021-03-11 00:37:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:10,341 INFO L93 Difference]: Finished difference Result 25110 states and 96518 transitions. [2021-03-11 00:37:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:37:10,343 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 [2021-03-11 00:37:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:10,401 INFO L225 Difference]: With dead ends: 25110 [2021-03-11 00:37:10,401 INFO L226 Difference]: Without dead ends: 25063 [2021-03-11 00:37:10,401 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:37:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25063 states. [2021-03-11 00:37:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25063 to 20843. [2021-03-11 00:37:10,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20843 states, 20842 states have (on average 3.909125803665675) internal successors, (81474), 20842 states have internal predecessors, (81474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20843 states to 20843 states and 81474 transitions. [2021-03-11 00:37:10,798 INFO L78 Accepts]: Start accepts. Automaton has 20843 states and 81474 transitions. Word has length 28 [2021-03-11 00:37:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:10,798 INFO L480 AbstractCegarLoop]: Abstraction has 20843 states and 81474 transitions. [2021-03-11 00:37:10,798 INFO L481 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) [2021-03-11 00:37:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 20843 states and 81474 transitions. [2021-03-11 00:37:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:10,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:10,827 INFO L519 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] [2021-03-11 00:37:11,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-03-11 00:37:11,028 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1261765878, now seen corresponding path program 115 times [2021-03-11 00:37:11,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:11,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207144991] [2021-03-11 00:37:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:11,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207144991] [2021-03-11 00:37:11,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57641222] [2021-03-11 00:37:11,112 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 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 [2021-03-11 00:37:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:37:11,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:11,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:11,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:37:11,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814308390] [2021-03-11 00:37:11,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:11,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:11,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:11,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:37:11,348 INFO L87 Difference]: Start difference. First operand 20843 states and 81474 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:11,876 INFO L93 Difference]: Finished difference Result 23598 states and 89846 transitions. [2021-03-11 00:37:11,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:37:11,878 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 [2021-03-11 00:37:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:11,927 INFO L225 Difference]: With dead ends: 23598 [2021-03-11 00:37:11,927 INFO L226 Difference]: Without dead ends: 23598 [2021-03-11 00:37:11,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23598 states. [2021-03-11 00:37:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23598 to 20346. [2021-03-11 00:37:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20346 states, 20345 states have (on average 3.8978618825264193) internal successors, (79302), 20345 states have internal predecessors, (79302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:12,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20346 states to 20346 states and 79302 transitions. [2021-03-11 00:37:12,342 INFO L78 Accepts]: Start accepts. Automaton has 20346 states and 79302 transitions. Word has length 28 [2021-03-11 00:37:12,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:12,342 INFO L480 AbstractCegarLoop]: Abstraction has 20346 states and 79302 transitions. [2021-03-11 00:37:12,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20346 states and 79302 transitions. [2021-03-11 00:37:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:12,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:12,372 INFO L519 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] [2021-03-11 00:37:12,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-11 00:37:12,573 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:12,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:12,573 INFO L82 PathProgramCache]: Analyzing trace with hash 310084440, now seen corresponding path program 116 times [2021-03-11 00:37:12,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:12,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445588310] [2021-03-11 00:37:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:12,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445588310] [2021-03-11 00:37:12,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876032391] [2021-03-11 00:37:12,684 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:37:12,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:12,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:12,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:13,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:13,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-03-11 00:37:13,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408115418] [2021-03-11 00:37:13,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:37:13,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:37:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:37:13,020 INFO L87 Difference]: Start difference. First operand 20346 states and 79302 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) [2021-03-11 00:37:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:15,401 INFO L93 Difference]: Finished difference Result 32302 states and 119801 transitions. [2021-03-11 00:37:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:37:15,404 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 [2021-03-11 00:37:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:15,484 INFO L225 Difference]: With dead ends: 32302 [2021-03-11 00:37:15,484 INFO L226 Difference]: Without dead ends: 32302 [2021-03-11 00:37:15,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1416.2ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:37:15,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32302 states. [2021-03-11 00:37:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32302 to 20412. [2021-03-11 00:37:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20412 states, 20411 states have (on average 3.895938464553427) internal successors, (79520), 20411 states have internal predecessors, (79520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20412 states to 20412 states and 79520 transitions. [2021-03-11 00:37:15,949 INFO L78 Accepts]: Start accepts. Automaton has 20412 states and 79520 transitions. Word has length 28 [2021-03-11 00:37:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:15,949 INFO L480 AbstractCegarLoop]: Abstraction has 20412 states and 79520 transitions. [2021-03-11 00:37:15,949 INFO L481 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) [2021-03-11 00:37:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 20412 states and 79520 transitions. [2021-03-11 00:37:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:15,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:15,982 INFO L519 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] [2021-03-11 00:37:16,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-03-11 00:37:16,182 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash -666234404, now seen corresponding path program 117 times [2021-03-11 00:37:16,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:16,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271254319] [2021-03-11 00:37:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:16,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271254319] [2021-03-11 00:37:16,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723933758] [2021-03-11 00:37:16,284 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 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 [2021-03-11 00:37:16,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:37:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:16,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:16,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:37:16,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944010656] [2021-03-11 00:37:16,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:37:16,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:16,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:37:16,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:37:16,621 INFO L87 Difference]: Start difference. First operand 20412 states and 79520 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) [2021-03-11 00:37:20,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:20,384 INFO L93 Difference]: Finished difference Result 41452 states and 151987 transitions. [2021-03-11 00:37:20,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-03-11 00:37:20,387 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 [2021-03-11 00:37:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:20,483 INFO L225 Difference]: With dead ends: 41452 [2021-03-11 00:37:20,483 INFO L226 Difference]: Without dead ends: 41452 [2021-03-11 00:37:20,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 2361.1ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-03-11 00:37:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41452 states. [2021-03-11 00:37:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41452 to 20417. [2021-03-11 00:37:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20417 states, 20416 states have (on average 3.8979721786833856) internal successors, (79581), 20416 states have internal predecessors, (79581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20417 states to 20417 states and 79581 transitions. [2021-03-11 00:37:21,122 INFO L78 Accepts]: Start accepts. Automaton has 20417 states and 79581 transitions. Word has length 28 [2021-03-11 00:37:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:21,122 INFO L480 AbstractCegarLoop]: Abstraction has 20417 states and 79581 transitions. [2021-03-11 00:37:21,123 INFO L481 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) [2021-03-11 00:37:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 20417 states and 79581 transitions. [2021-03-11 00:37:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:21,152 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:21,152 INFO L519 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] [2021-03-11 00:37:21,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:21,353 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -99282324, now seen corresponding path program 118 times [2021-03-11 00:37:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:21,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827596040] [2021-03-11 00:37:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:21,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827596040] [2021-03-11 00:37:21,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021443986] [2021-03-11 00:37:21,476 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 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 [2021-03-11 00:37:21,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:21,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:21,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:21,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:21,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:21,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-11 00:37:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211606192] [2021-03-11 00:37:21,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:37:21,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:21,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:37:21,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:37:21,826 INFO L87 Difference]: Start difference. First operand 20417 states and 79581 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) [2021-03-11 00:37:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:25,581 INFO L93 Difference]: Finished difference Result 41128 states and 151472 transitions. [2021-03-11 00:37:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-03-11 00:37:25,584 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 [2021-03-11 00:37:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:25,678 INFO L225 Difference]: With dead ends: 41128 [2021-03-11 00:37:25,678 INFO L226 Difference]: Without dead ends: 41128 [2021-03-11 00:37:25,679 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 2428.0ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-03-11 00:37:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41128 states. [2021-03-11 00:37:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41128 to 20205. [2021-03-11 00:37:26,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20205 states, 20204 states have (on average 3.8903187487626214) internal successors, (78600), 20204 states have internal predecessors, (78600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20205 states to 20205 states and 78600 transitions. [2021-03-11 00:37:26,311 INFO L78 Accepts]: Start accepts. Automaton has 20205 states and 78600 transitions. Word has length 28 [2021-03-11 00:37:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:26,311 INFO L480 AbstractCegarLoop]: Abstraction has 20205 states and 78600 transitions. [2021-03-11 00:37:26,311 INFO L481 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) [2021-03-11 00:37:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 20205 states and 78600 transitions. [2021-03-11 00:37:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:26,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:26,340 INFO L519 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] [2021-03-11 00:37:26,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-03-11 00:37:26,540 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash 836856348, now seen corresponding path program 119 times [2021-03-11 00:37:26,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:26,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661741171] [2021-03-11 00:37:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:26,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661741171] [2021-03-11 00:37:26,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840617200] [2021-03-11 00:37:26,617 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 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 [2021-03-11 00:37:26,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:37:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:37:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:37:26,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:26,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-11 00:37:26,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000142010] [2021-03-11 00:37:26,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:26,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:26,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:26,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:37:26,847 INFO L87 Difference]: Start difference. First operand 20205 states and 78600 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) [2021-03-11 00:37:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:27,444 INFO L93 Difference]: Finished difference Result 29714 states and 111113 transitions. [2021-03-11 00:37:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:37:27,447 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 [2021-03-11 00:37:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:27,515 INFO L225 Difference]: With dead ends: 29714 [2021-03-11 00:37:27,515 INFO L226 Difference]: Without dead ends: 29697 [2021-03-11 00:37:27,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:37:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29697 states. [2021-03-11 00:37:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29697 to 20476. [2021-03-11 00:37:27,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20476 states, 20475 states have (on average 3.895775335775336) internal successors, (79766), 20475 states have internal predecessors, (79766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20476 states to 20476 states and 79766 transitions. [2021-03-11 00:37:27,950 INFO L78 Accepts]: Start accepts. Automaton has 20476 states and 79766 transitions. Word has length 28 [2021-03-11 00:37:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:27,951 INFO L480 AbstractCegarLoop]: Abstraction has 20476 states and 79766 transitions. [2021-03-11 00:37:27,951 INFO L481 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) [2021-03-11 00:37:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 20476 states and 79766 transitions. [2021-03-11 00:37:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:27,981 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:27,981 INFO L519 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] [2021-03-11 00:37:28,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable436,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:28,181 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash -306069692, now seen corresponding path program 120 times [2021-03-11 00:37:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:28,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735696235] [2021-03-11 00:37:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:28,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735696235] [2021-03-11 00:37:28,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737053056] [2021-03-11 00:37:28,262 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 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 [2021-03-11 00:37:28,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:37:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:37:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:37:28,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:28,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-03-11 00:37:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104204611] [2021-03-11 00:37:28,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:37:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:28,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:37:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:37:28,518 INFO L87 Difference]: Start difference. First operand 20476 states and 79766 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) [2021-03-11 00:37:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:29,193 INFO L93 Difference]: Finished difference Result 31499 states and 116678 transitions. [2021-03-11 00:37:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:37:29,195 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 [2021-03-11 00:37:29,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:29,262 INFO L225 Difference]: With dead ends: 31499 [2021-03-11 00:37:29,262 INFO L226 Difference]: Without dead ends: 31499 [2021-03-11 00:37:29,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 347.4ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:37:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31499 states. [2021-03-11 00:37:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31499 to 20145. [2021-03-11 00:37:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20145 states, 20144 states have (on average 3.8810563939634632) internal successors, (78180), 20144 states have internal predecessors, (78180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20145 states to 20145 states and 78180 transitions. [2021-03-11 00:37:29,698 INFO L78 Accepts]: Start accepts. Automaton has 20145 states and 78180 transitions. Word has length 28 [2021-03-11 00:37:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:29,698 INFO L480 AbstractCegarLoop]: Abstraction has 20145 states and 78180 transitions. [2021-03-11 00:37:29,698 INFO L481 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) [2021-03-11 00:37:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20145 states and 78180 transitions. [2021-03-11 00:37:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:29,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:29,728 INFO L519 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] [2021-03-11 00:37:29,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-03-11 00:37:29,928 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:29,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1652751258, now seen corresponding path program 121 times [2021-03-11 00:37:29,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:29,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979674802] [2021-03-11 00:37:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:30,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979674802] [2021-03-11 00:37:30,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682548549] [2021-03-11 00:37:30,048 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 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 [2021-03-11 00:37:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:30,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:30,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:30,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:30,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:37:30,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239467233] [2021-03-11 00:37:30,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:37:30,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:37:30,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:37:30,362 INFO L87 Difference]: Start difference. First operand 20145 states and 78180 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) [2021-03-11 00:37:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:32,535 INFO L93 Difference]: Finished difference Result 29825 states and 110934 transitions. [2021-03-11 00:37:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:37:32,537 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 [2021-03-11 00:37:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:32,606 INFO L225 Difference]: With dead ends: 29825 [2021-03-11 00:37:32,606 INFO L226 Difference]: Without dead ends: 29825 [2021-03-11 00:37:32,606 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:37:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29825 states. [2021-03-11 00:37:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29825 to 20193. [2021-03-11 00:37:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20193 states, 20192 states have (on average 3.879457210776545) internal successors, (78334), 20192 states have internal predecessors, (78334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20193 states to 20193 states and 78334 transitions. [2021-03-11 00:37:33,246 INFO L78 Accepts]: Start accepts. Automaton has 20193 states and 78334 transitions. Word has length 28 [2021-03-11 00:37:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:33,246 INFO L480 AbstractCegarLoop]: Abstraction has 20193 states and 78334 transitions. [2021-03-11 00:37:33,246 INFO L481 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) [2021-03-11 00:37:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 20193 states and 78334 transitions. [2021-03-11 00:37:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:33,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:33,275 INFO L519 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] [2021-03-11 00:37:33,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:33,475 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash -867837164, now seen corresponding path program 122 times [2021-03-11 00:37:33,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:33,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367954548] [2021-03-11 00:37:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:33,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367954548] [2021-03-11 00:37:33,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476958201] [2021-03-11 00:37:33,583 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 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 [2021-03-11 00:37:33,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:33,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:33,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:33,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:37:33,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555449754] [2021-03-11 00:37:33,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:37:33,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:37:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:37:33,902 INFO L87 Difference]: Start difference. First operand 20193 states and 78334 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) [2021-03-11 00:37:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:36,632 INFO L93 Difference]: Finished difference Result 31497 states and 115770 transitions. [2021-03-11 00:37:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-11 00:37:36,635 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 [2021-03-11 00:37:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:36,707 INFO L225 Difference]: With dead ends: 31497 [2021-03-11 00:37:36,707 INFO L226 Difference]: Without dead ends: 31497 [2021-03-11 00:37:36,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 1708.9ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-03-11 00:37:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31497 states. [2021-03-11 00:37:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31497 to 20733. [2021-03-11 00:37:37,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20733 states, 20732 states have (on average 3.8584796449932472) internal successors, (79994), 20732 states have internal predecessors, (79994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20733 states to 20733 states and 79994 transitions. [2021-03-11 00:37:37,280 INFO L78 Accepts]: Start accepts. Automaton has 20733 states and 79994 transitions. Word has length 28 [2021-03-11 00:37:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:37,280 INFO L480 AbstractCegarLoop]: Abstraction has 20733 states and 79994 transitions. [2021-03-11 00:37:37,280 INFO L481 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) [2021-03-11 00:37:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 20733 states and 79994 transitions. [2021-03-11 00:37:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:37,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:37,309 INFO L519 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] [2021-03-11 00:37:37,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:37,509 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash -912658306, now seen corresponding path program 123 times [2021-03-11 00:37:37,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:37,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604440656] [2021-03-11 00:37:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:37,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604440656] [2021-03-11 00:37:37,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546355575] [2021-03-11 00:37:37,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:37:37,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:37:37,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:37,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:37,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:37,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-11 00:37:37,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971021820] [2021-03-11 00:37:37,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:37:37,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:37:37,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:37:37,944 INFO L87 Difference]: Start difference. First operand 20733 states and 79994 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) [2021-03-11 00:37:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:40,263 INFO L93 Difference]: Finished difference Result 30547 states and 113289 transitions. [2021-03-11 00:37:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:37:40,266 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 [2021-03-11 00:37:40,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:40,341 INFO L225 Difference]: With dead ends: 30547 [2021-03-11 00:37:40,342 INFO L226 Difference]: Without dead ends: 30543 [2021-03-11 00:37:40,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1458.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:37:40,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30543 states. [2021-03-11 00:37:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30543 to 20625. [2021-03-11 00:37:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20625 states, 20624 states have (on average 3.861132660977502) internal successors, (79632), 20624 states have internal predecessors, (79632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 79632 transitions. [2021-03-11 00:37:40,879 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 79632 transitions. Word has length 28 [2021-03-11 00:37:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:40,879 INFO L480 AbstractCegarLoop]: Abstraction has 20625 states and 79632 transitions. [2021-03-11 00:37:40,879 INFO L481 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) [2021-03-11 00:37:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 79632 transitions. [2021-03-11 00:37:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:40,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:40,910 INFO L519 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] [2021-03-11 00:37:41,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:41,110 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash -47274368, now seen corresponding path program 124 times [2021-03-11 00:37:41,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:41,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391211793] [2021-03-11 00:37:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391211793] [2021-03-11 00:37:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052403566] [2021-03-11 00:37:41,198 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 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 [2021-03-11 00:37:41,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:41,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:41,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:37:41,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:41,506 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-03-11 00:37:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-11 00:37:41,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:41,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-03-11 00:37:41,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341990405] [2021-03-11 00:37:41,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:37:41,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:41,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:37:41,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:37:41,604 INFO L87 Difference]: Start difference. First operand 20625 states and 79632 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) [2021-03-11 00:37:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:42,149 INFO L93 Difference]: Finished difference Result 25637 states and 95562 transitions. [2021-03-11 00:37:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:37:42,152 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 [2021-03-11 00:37:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:42,212 INFO L225 Difference]: With dead ends: 25637 [2021-03-11 00:37:42,212 INFO L226 Difference]: Without dead ends: 25637 [2021-03-11 00:37:42,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:37:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25637 states. [2021-03-11 00:37:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25637 to 20910. [2021-03-11 00:37:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20910 states, 20909 states have (on average 3.8524080539480607) internal successors, (80550), 20909 states have internal predecessors, (80550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20910 states to 20910 states and 80550 transitions. [2021-03-11 00:37:42,614 INFO L78 Accepts]: Start accepts. Automaton has 20910 states and 80550 transitions. Word has length 28 [2021-03-11 00:37:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:42,614 INFO L480 AbstractCegarLoop]: Abstraction has 20910 states and 80550 transitions. [2021-03-11 00:37:42,614 INFO L481 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) [2021-03-11 00:37:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 20910 states and 80550 transitions. [2021-03-11 00:37:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:42,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:42,645 INFO L519 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] [2021-03-11 00:37:42,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-03-11 00:37:42,845 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash 882925376, now seen corresponding path program 125 times [2021-03-11 00:37:42,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:42,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029064086] [2021-03-11 00:37:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:42,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029064086] [2021-03-11 00:37:42,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847296741] [2021-03-11 00:37:42,961 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 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 [2021-03-11 00:37:42,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:37:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:42,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:37:43,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:43,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:37:43,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639835727] [2021-03-11 00:37:43,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:37:43,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:43,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:37:43,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:37:43,261 INFO L87 Difference]: Start difference. First operand 20910 states and 80550 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) [2021-03-11 00:37:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:45,675 INFO L93 Difference]: Finished difference Result 31417 states and 115177 transitions. [2021-03-11 00:37:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:37:45,678 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 [2021-03-11 00:37:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:45,751 INFO L225 Difference]: With dead ends: 31417 [2021-03-11 00:37:45,751 INFO L226 Difference]: Without dead ends: 31417 [2021-03-11 00:37:45,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1454.7ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:37:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31417 states. [2021-03-11 00:37:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31417 to 22542. [2021-03-11 00:37:46,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 3.8634488265826716) internal successors, (87086), 22541 states have internal predecessors, (87086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 87086 transitions. [2021-03-11 00:37:46,460 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 87086 transitions. Word has length 28 [2021-03-11 00:37:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:46,460 INFO L480 AbstractCegarLoop]: Abstraction has 22542 states and 87086 transitions. [2021-03-11 00:37:46,460 INFO L481 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) [2021-03-11 00:37:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 87086 transitions. [2021-03-11 00:37:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:46,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:46,497 INFO L519 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] [2021-03-11 00:37:46,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-03-11 00:37:46,698 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash -956846952, now seen corresponding path program 126 times [2021-03-11 00:37:46,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:46,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751176612] [2021-03-11 00:37:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:46,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751176612] [2021-03-11 00:37:46,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568836767] [2021-03-11 00:37:46,828 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 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 [2021-03-11 00:37:46,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:37:46,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:46,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:37:47,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:47,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:37:47,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786035691] [2021-03-11 00:37:47,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:37:47,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:47,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:37:47,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:37:47,132 INFO L87 Difference]: Start difference. First operand 22542 states and 87086 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) [2021-03-11 00:37:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:49,113 INFO L93 Difference]: Finished difference Result 29674 states and 110683 transitions. [2021-03-11 00:37:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:37:49,115 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 [2021-03-11 00:37:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:49,188 INFO L225 Difference]: With dead ends: 29674 [2021-03-11 00:37:49,188 INFO L226 Difference]: Without dead ends: 29662 [2021-03-11 00:37:49,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1216.7ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:37:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29662 states. [2021-03-11 00:37:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29662 to 22694. [2021-03-11 00:37:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22694 states, 22693 states have (on average 3.858017890979597) internal successors, (87550), 22693 states have internal predecessors, (87550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22694 states to 22694 states and 87550 transitions. [2021-03-11 00:37:49,811 INFO L78 Accepts]: Start accepts. Automaton has 22694 states and 87550 transitions. Word has length 28 [2021-03-11 00:37:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:49,812 INFO L480 AbstractCegarLoop]: Abstraction has 22694 states and 87550 transitions. [2021-03-11 00:37:49,812 INFO L481 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) [2021-03-11 00:37:49,812 INFO L276 IsEmpty]: Start isEmpty. Operand 22694 states and 87550 transitions. [2021-03-11 00:37:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:49,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:49,850 INFO L519 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] [2021-03-11 00:37:50,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-03-11 00:37:50,057 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:50,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:50,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1587630268, now seen corresponding path program 127 times [2021-03-11 00:37:50,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:50,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862221663] [2021-03-11 00:37:50,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862221663] [2021-03-11 00:37:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581229250] [2021-03-11 00:37:50,148 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 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 [2021-03-11 00:37:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:50,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:37:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:37:50,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:50,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:37:50,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812635783] [2021-03-11 00:37:50,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:37:50,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:50,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:37:50,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:37:50,422 INFO L87 Difference]: Start difference. First operand 22694 states and 87550 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) [2021-03-11 00:37:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:51,000 INFO L93 Difference]: Finished difference Result 25953 states and 98507 transitions. [2021-03-11 00:37:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-11 00:37:51,002 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 [2021-03-11 00:37:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:51,066 INFO L225 Difference]: With dead ends: 25953 [2021-03-11 00:37:51,067 INFO L226 Difference]: Without dead ends: 25953 [2021-03-11 00:37:51,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:37:51,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25953 states. [2021-03-11 00:37:51,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25953 to 23497. [2021-03-11 00:37:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23497 states, 23496 states have (on average 3.852953694245829) internal successors, (90529), 23496 states have internal predecessors, (90529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23497 states to 23497 states and 90529 transitions. [2021-03-11 00:37:51,793 INFO L78 Accepts]: Start accepts. Automaton has 23497 states and 90529 transitions. Word has length 28 [2021-03-11 00:37:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:51,793 INFO L480 AbstractCegarLoop]: Abstraction has 23497 states and 90529 transitions. [2021-03-11 00:37:51,793 INFO L481 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) [2021-03-11 00:37:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 23497 states and 90529 transitions. [2021-03-11 00:37:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:51,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:51,831 INFO L519 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] [2021-03-11 00:37:52,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-03-11 00:37:52,032 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1143968700, now seen corresponding path program 128 times [2021-03-11 00:37:52,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:52,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307459789] [2021-03-11 00:37:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307459789] [2021-03-11 00:37:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450842966] [2021-03-11 00:37:52,154 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 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 [2021-03-11 00:37:52,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:37:52,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:52,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:52,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:37:52,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652767438] [2021-03-11 00:37:52,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:37:52,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:52,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:37:52,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:37:52,476 INFO L87 Difference]: Start difference. First operand 23497 states and 90529 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) [2021-03-11 00:37:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:54,738 INFO L93 Difference]: Finished difference Result 31449 states and 116111 transitions. [2021-03-11 00:37:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:37:54,739 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 [2021-03-11 00:37:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:54,813 INFO L225 Difference]: With dead ends: 31449 [2021-03-11 00:37:54,813 INFO L226 Difference]: Without dead ends: 31449 [2021-03-11 00:37:54,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1416.0ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:37:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31449 states. [2021-03-11 00:37:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31449 to 24701. [2021-03-11 00:37:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24701 states, 24700 states have (on average 3.8202024291497976) internal successors, (94359), 24700 states have internal predecessors, (94359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24701 states to 24701 states and 94359 transitions. [2021-03-11 00:37:55,477 INFO L78 Accepts]: Start accepts. Automaton has 24701 states and 94359 transitions. Word has length 28 [2021-03-11 00:37:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:55,477 INFO L480 AbstractCegarLoop]: Abstraction has 24701 states and 94359 transitions. [2021-03-11 00:37:55,477 INFO L481 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) [2021-03-11 00:37:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 24701 states and 94359 transitions. [2021-03-11 00:37:55,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:55,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:55,514 INFO L519 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] [2021-03-11 00:37:55,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-03-11 00:37:55,714 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:55,715 INFO L82 PathProgramCache]: Analyzing trace with hash -403875748, now seen corresponding path program 129 times [2021-03-11 00:37:55,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:55,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90112677] [2021-03-11 00:37:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:55,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90112677] [2021-03-11 00:37:55,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907965220] [2021-03-11 00:37:55,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:37:55,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:37:55,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:55,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:56,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:56,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:37:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744869655] [2021-03-11 00:37:56,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:37:56,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:56,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:37:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:37:56,081 INFO L87 Difference]: Start difference. First operand 24701 states and 94359 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) [2021-03-11 00:37:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:37:57,856 INFO L93 Difference]: Finished difference Result 30571 states and 113768 transitions. [2021-03-11 00:37:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:37:57,859 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 [2021-03-11 00:37:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:37:57,939 INFO L225 Difference]: With dead ends: 30571 [2021-03-11 00:37:57,940 INFO L226 Difference]: Without dead ends: 30563 [2021-03-11 00:37:57,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 989.7ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:37:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30563 states. [2021-03-11 00:37:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30563 to 24523. [2021-03-11 00:37:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24523 states, 24522 states have (on average 3.826278443846342) internal successors, (93828), 24522 states have internal predecessors, (93828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:37:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24523 states to 24523 states and 93828 transitions. [2021-03-11 00:37:58,573 INFO L78 Accepts]: Start accepts. Automaton has 24523 states and 93828 transitions. Word has length 28 [2021-03-11 00:37:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:37:58,573 INFO L480 AbstractCegarLoop]: Abstraction has 24523 states and 93828 transitions. [2021-03-11 00:37:58,573 INFO L481 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) [2021-03-11 00:37:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24523 states and 93828 transitions. [2021-03-11 00:37:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:37:58,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:37:58,608 INFO L519 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] [2021-03-11 00:37:58,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:37:58,808 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:37:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:37:58,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1046121180, now seen corresponding path program 130 times [2021-03-11 00:37:58,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:37:58,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372291154] [2021-03-11 00:37:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:37:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:37:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:58,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372291154] [2021-03-11 00:37:58,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676424714] [2021-03-11 00:37:58,920 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 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 [2021-03-11 00:37:58,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:37:58,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:37:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:37:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:37:59,146 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-03-11 00:37:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:37:59,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:37:59,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:37:59,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237674777] [2021-03-11 00:37:59,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:37:59,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:37:59,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:37:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:37:59,357 INFO L87 Difference]: Start difference. First operand 24523 states and 93828 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) [2021-03-11 00:38:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:01,531 INFO L93 Difference]: Finished difference Result 32405 states and 119336 transitions. [2021-03-11 00:38:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:38:01,531 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 [2021-03-11 00:38:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:01,609 INFO L225 Difference]: With dead ends: 32405 [2021-03-11 00:38:01,609 INFO L226 Difference]: Without dead ends: 32405 [2021-03-11 00:38:01,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1354.2ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:38:01,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32405 states. [2021-03-11 00:38:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32405 to 25505. [2021-03-11 00:38:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.802423149309912) internal successors, (96977), 25504 states have internal predecessors, (96977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 96977 transitions. [2021-03-11 00:38:02,274 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 96977 transitions. Word has length 28 [2021-03-11 00:38:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:02,274 INFO L480 AbstractCegarLoop]: Abstraction has 25505 states and 96977 transitions. [2021-03-11 00:38:02,274 INFO L481 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) [2021-03-11 00:38:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 96977 transitions. [2021-03-11 00:38:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:02,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:02,311 INFO L519 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] [2021-03-11 00:38:02,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-03-11 00:38:02,511 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:02,512 INFO L82 PathProgramCache]: Analyzing trace with hash -36901476, now seen corresponding path program 131 times [2021-03-11 00:38:02,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:02,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084548448] [2021-03-11 00:38:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:02,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084548448] [2021-03-11 00:38:02,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847920643] [2021-03-11 00:38:02,621 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 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 [2021-03-11 00:38:02,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:38:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:02,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:38:02,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:02,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:02,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-11 00:38:02,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770672692] [2021-03-11 00:38:02,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:38:02,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:02,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:38:02,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:38:02,914 INFO L87 Difference]: Start difference. First operand 25505 states and 96977 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:04,047 INFO L93 Difference]: Finished difference Result 31168 states and 117592 transitions. [2021-03-11 00:38:04,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:38:04,050 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 [2021-03-11 00:38:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:04,124 INFO L225 Difference]: With dead ends: 31168 [2021-03-11 00:38:04,124 INFO L226 Difference]: Without dead ends: 31155 [2021-03-11 00:38:04,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:38:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31155 states. [2021-03-11 00:38:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31155 to 29628. [2021-03-11 00:38:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29628 states, 29627 states have (on average 3.819927768589462) internal successors, (113173), 29627 states have internal predecessors, (113173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29628 states to 29628 states and 113173 transitions. [2021-03-11 00:38:04,956 INFO L78 Accepts]: Start accepts. Automaton has 29628 states and 113173 transitions. Word has length 28 [2021-03-11 00:38:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:04,956 INFO L480 AbstractCegarLoop]: Abstraction has 29628 states and 113173 transitions. [2021-03-11 00:38:04,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 29628 states and 113173 transitions. [2021-03-11 00:38:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:05,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:05,004 INFO L519 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] [2021-03-11 00:38:05,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:38:05,204 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1434176642, now seen corresponding path program 132 times [2021-03-11 00:38:05,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:05,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087868027] [2021-03-11 00:38:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:05,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087868027] [2021-03-11 00:38:05,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315886447] [2021-03-11 00:38:05,315 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 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 [2021-03-11 00:38:05,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:38:05,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:38:05,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:05,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:05,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-11 00:38:05,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8151821] [2021-03-11 00:38:05,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:38:05,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:05,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:38:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:38:05,588 INFO L87 Difference]: Start difference. First operand 29628 states and 113173 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:06,715 INFO L93 Difference]: Finished difference Result 32631 states and 122504 transitions. [2021-03-11 00:38:06,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:38:06,718 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 [2021-03-11 00:38:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:06,798 INFO L225 Difference]: With dead ends: 32631 [2021-03-11 00:38:06,798 INFO L226 Difference]: Without dead ends: 32631 [2021-03-11 00:38:06,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:38:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32631 states. [2021-03-11 00:38:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32631 to 29373. [2021-03-11 00:38:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29373 states, 29372 states have (on average 3.816355712923873) internal successors, (112094), 29372 states have internal predecessors, (112094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29373 states to 29373 states and 112094 transitions. [2021-03-11 00:38:07,504 INFO L78 Accepts]: Start accepts. Automaton has 29373 states and 112094 transitions. Word has length 28 [2021-03-11 00:38:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:07,504 INFO L480 AbstractCegarLoop]: Abstraction has 29373 states and 112094 transitions. [2021-03-11 00:38:07,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 29373 states and 112094 transitions. [2021-03-11 00:38:07,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:07,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:07,552 INFO L519 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] [2021-03-11 00:38:07,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:38:07,753 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1001300038, now seen corresponding path program 133 times [2021-03-11 00:38:07,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:07,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763997343] [2021-03-11 00:38:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763997343] [2021-03-11 00:38:07,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028614579] [2021-03-11 00:38:07,858 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 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 [2021-03-11 00:38:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:07,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:08,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:08,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:38:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084548459] [2021-03-11 00:38:08,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:38:08,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:38:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:38:08,161 INFO L87 Difference]: Start difference. First operand 29373 states and 112094 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) [2021-03-11 00:38:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:10,047 INFO L93 Difference]: Finished difference Result 35986 states and 133856 transitions. [2021-03-11 00:38:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:38:10,050 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 [2021-03-11 00:38:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:10,135 INFO L225 Difference]: With dead ends: 35986 [2021-03-11 00:38:10,135 INFO L226 Difference]: Without dead ends: 35978 [2021-03-11 00:38:10,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:38:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35978 states. [2021-03-11 00:38:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35978 to 29339. [2021-03-11 00:38:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29339 states, 29338 states have (on average 3.8167905106005864) internal successors, (111977), 29338 states have internal predecessors, (111977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29339 states to 29339 states and 111977 transitions. [2021-03-11 00:38:10,972 INFO L78 Accepts]: Start accepts. Automaton has 29339 states and 111977 transitions. Word has length 28 [2021-03-11 00:38:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:10,972 INFO L480 AbstractCegarLoop]: Abstraction has 29339 states and 111977 transitions. [2021-03-11 00:38:10,972 INFO L481 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) [2021-03-11 00:38:10,972 INFO L276 IsEmpty]: Start isEmpty. Operand 29339 states and 111977 transitions. [2021-03-11 00:38:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:11,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:11,028 INFO L519 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] [2021-03-11 00:38:11,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:38:11,228 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash 105479222, now seen corresponding path program 134 times [2021-03-11 00:38:11,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:11,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342684531] [2021-03-11 00:38:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:38:11,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342684531] [2021-03-11 00:38:11,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282754282] [2021-03-11 00:38:11,348 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 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 [2021-03-11 00:38:11,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:38:11,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:38:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:38:11,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:11,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-11 00:38:11,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728707383] [2021-03-11 00:38:11,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:38:11,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:38:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:38:11,638 INFO L87 Difference]: Start difference. First operand 29339 states and 111977 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:12,804 INFO L93 Difference]: Finished difference Result 32185 states and 121439 transitions. [2021-03-11 00:38:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:38:12,807 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 [2021-03-11 00:38:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:12,893 INFO L225 Difference]: With dead ends: 32185 [2021-03-11 00:38:12,893 INFO L226 Difference]: Without dead ends: 32185 [2021-03-11 00:38:12,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 702.5ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:38:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32185 states. [2021-03-11 00:38:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32185 to 29871. [2021-03-11 00:38:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29871 states, 29870 states have (on average 3.8152326749246734) internal successors, (113961), 29870 states have internal predecessors, (113961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29871 states to 29871 states and 113961 transitions. [2021-03-11 00:38:13,692 INFO L78 Accepts]: Start accepts. Automaton has 29871 states and 113961 transitions. Word has length 28 [2021-03-11 00:38:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:13,692 INFO L480 AbstractCegarLoop]: Abstraction has 29871 states and 113961 transitions. [2021-03-11 00:38:13,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 29871 states and 113961 transitions. [2021-03-11 00:38:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:13,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:13,741 INFO L519 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] [2021-03-11 00:38:13,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:38:13,942 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1598636696, now seen corresponding path program 135 times [2021-03-11 00:38:13,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:13,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575669542] [2021-03-11 00:38:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:38:14,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575669542] [2021-03-11 00:38:14,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771179749] [2021-03-11 00:38:14,051 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 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 [2021-03-11 00:38:14,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:38:14,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:14,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:14,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:38:14,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:14,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:38:14,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051541491] [2021-03-11 00:38:14,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:38:14,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:14,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:38:14,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:38:14,344 INFO L87 Difference]: Start difference. First operand 29871 states and 113961 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) [2021-03-11 00:38:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:16,034 INFO L93 Difference]: Finished difference Result 36821 states and 137037 transitions. [2021-03-11 00:38:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:38:16,036 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 [2021-03-11 00:38:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:16,128 INFO L225 Difference]: With dead ends: 36821 [2021-03-11 00:38:16,128 INFO L226 Difference]: Without dead ends: 36797 [2021-03-11 00:38:16,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 972.0ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:38:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36797 states. [2021-03-11 00:38:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36797 to 30043. [2021-03-11 00:38:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30043 states, 30042 states have (on average 3.811164369882165) internal successors, (114495), 30042 states have internal predecessors, (114495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30043 states to 30043 states and 114495 transitions. [2021-03-11 00:38:16,989 INFO L78 Accepts]: Start accepts. Automaton has 30043 states and 114495 transitions. Word has length 28 [2021-03-11 00:38:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:16,989 INFO L480 AbstractCegarLoop]: Abstraction has 30043 states and 114495 transitions. [2021-03-11 00:38:16,990 INFO L481 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) [2021-03-11 00:38:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 30043 states and 114495 transitions. [2021-03-11 00:38:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:17,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:17,047 INFO L519 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] [2021-03-11 00:38:17,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-03-11 00:38:17,247 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:17,247 INFO L82 PathProgramCache]: Analyzing trace with hash -252372998, now seen corresponding path program 136 times [2021-03-11 00:38:17,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:17,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920508026] [2021-03-11 00:38:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:17,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920508026] [2021-03-11 00:38:17,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055864032] [2021-03-11 00:38:17,389 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 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 [2021-03-11 00:38:17,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:38:17,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:38:17,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:17,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:17,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-03-11 00:38:17,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720576061] [2021-03-11 00:38:17,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:38:17,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:38:17,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:38:17,686 INFO L87 Difference]: Start difference. First operand 30043 states and 114495 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) [2021-03-11 00:38:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:19,202 INFO L93 Difference]: Finished difference Result 32599 states and 122907 transitions. [2021-03-11 00:38:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:38:19,205 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 [2021-03-11 00:38:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:19,461 INFO L225 Difference]: With dead ends: 32599 [2021-03-11 00:38:19,461 INFO L226 Difference]: Without dead ends: 32599 [2021-03-11 00:38:19,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 818.5ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:38:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32599 states. [2021-03-11 00:38:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32599 to 29969. [2021-03-11 00:38:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29969 states, 29968 states have (on average 3.812032835024026) internal successors, (114239), 29968 states have internal predecessors, (114239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29969 states to 29969 states and 114239 transitions. [2021-03-11 00:38:20,125 INFO L78 Accepts]: Start accepts. Automaton has 29969 states and 114239 transitions. Word has length 28 [2021-03-11 00:38:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:20,125 INFO L480 AbstractCegarLoop]: Abstraction has 29969 states and 114239 transitions. [2021-03-11 00:38:20,125 INFO L481 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) [2021-03-11 00:38:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 29969 states and 114239 transitions. [2021-03-11 00:38:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:20,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:20,176 INFO L519 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] [2021-03-11 00:38:20,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-03-11 00:38:20,376 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:20,376 INFO L82 PathProgramCache]: Analyzing trace with hash 606143132, now seen corresponding path program 137 times [2021-03-11 00:38:20,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:20,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458993254] [2021-03-11 00:38:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:20,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458993254] [2021-03-11 00:38:20,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528994589] [2021-03-11 00:38:20,510 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 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 [2021-03-11 00:38:20,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:38:20,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:20,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:20,907 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-03-11 00:38:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:20,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:20,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-11 00:38:20,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505417860] [2021-03-11 00:38:20,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:38:20,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:38:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:38:20,914 INFO L87 Difference]: Start difference. First operand 29969 states and 114239 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) [2021-03-11 00:38:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:23,010 INFO L93 Difference]: Finished difference Result 36744 states and 136778 transitions. [2021-03-11 00:38:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:38:23,013 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 [2021-03-11 00:38:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:23,110 INFO L225 Difference]: With dead ends: 36744 [2021-03-11 00:38:23,110 INFO L226 Difference]: Without dead ends: 36704 [2021-03-11 00:38:23,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1176.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:38:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36704 states. [2021-03-11 00:38:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36704 to 30125. [2021-03-11 00:38:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30125 states, 30124 states have (on average 3.8080932147125215) internal successors, (114715), 30124 states have internal predecessors, (114715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30125 states to 30125 states and 114715 transitions. [2021-03-11 00:38:23,887 INFO L78 Accepts]: Start accepts. Automaton has 30125 states and 114715 transitions. Word has length 28 [2021-03-11 00:38:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:23,887 INFO L480 AbstractCegarLoop]: Abstraction has 30125 states and 114715 transitions. [2021-03-11 00:38:23,887 INFO L481 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) [2021-03-11 00:38:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30125 states and 114715 transitions. [2021-03-11 00:38:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:23,939 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:23,939 INFO L519 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] [2021-03-11 00:38:24,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-03-11 00:38:24,139 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1649950116, now seen corresponding path program 138 times [2021-03-11 00:38:24,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:24,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843178280] [2021-03-11 00:38:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843178280] [2021-03-11 00:38:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012149370] [2021-03-11 00:38:24,256 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 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 [2021-03-11 00:38:24,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:38:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:24,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:24,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:38:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077909969] [2021-03-11 00:38:24,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:38:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:38:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:38:24,737 INFO L87 Difference]: Start difference. First operand 30125 states and 114715 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) [2021-03-11 00:38:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:28,890 INFO L93 Difference]: Finished difference Result 68801 states and 253165 transitions. [2021-03-11 00:38:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:38:28,893 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 [2021-03-11 00:38:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:29,085 INFO L225 Difference]: With dead ends: 68801 [2021-03-11 00:38:29,085 INFO L226 Difference]: Without dead ends: 68801 [2021-03-11 00:38:29,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 2480.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:38:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68801 states. [2021-03-11 00:38:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68801 to 37809. [2021-03-11 00:38:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37809 states, 37808 states have (on average 3.8872460854845534) internal successors, (146969), 37808 states have internal predecessors, (146969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37809 states to 37809 states and 146969 transitions. [2021-03-11 00:38:30,514 INFO L78 Accepts]: Start accepts. Automaton has 37809 states and 146969 transitions. Word has length 28 [2021-03-11 00:38:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:30,514 INFO L480 AbstractCegarLoop]: Abstraction has 37809 states and 146969 transitions. [2021-03-11 00:38:30,514 INFO L481 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) [2021-03-11 00:38:30,514 INFO L276 IsEmpty]: Start isEmpty. Operand 37809 states and 146969 transitions. [2021-03-11 00:38:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:30,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:30,584 INFO L519 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] [2021-03-11 00:38:30,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-03-11 00:38:30,784 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1082998036, now seen corresponding path program 139 times [2021-03-11 00:38:30,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:30,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286316169] [2021-03-11 00:38:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:30,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286316169] [2021-03-11 00:38:30,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277394840] [2021-03-11 00:38:30,903 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 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 [2021-03-11 00:38:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:30,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:31,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:31,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:38:31,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794790488] [2021-03-11 00:38:31,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:38:31,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:38:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:38:31,396 INFO L87 Difference]: Start difference. First operand 37809 states and 146969 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) [2021-03-11 00:38:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:35,326 INFO L93 Difference]: Finished difference Result 68217 states and 251622 transitions. [2021-03-11 00:38:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:38:35,329 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 [2021-03-11 00:38:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:35,523 INFO L225 Difference]: With dead ends: 68217 [2021-03-11 00:38:35,523 INFO L226 Difference]: Without dead ends: 68217 [2021-03-11 00:38:35,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2595.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:38:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68217 states. [2021-03-11 00:38:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68217 to 37806. [2021-03-11 00:38:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 3.8871842348895647) internal successors, (146955), 37805 states have internal predecessors, (146955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 146955 transitions. [2021-03-11 00:38:36,892 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 146955 transitions. Word has length 28 [2021-03-11 00:38:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:36,892 INFO L480 AbstractCegarLoop]: Abstraction has 37806 states and 146955 transitions. [2021-03-11 00:38:36,892 INFO L481 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) [2021-03-11 00:38:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 146955 transitions. [2021-03-11 00:38:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:36,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:36,955 INFO L519 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] [2021-03-11 00:38:37,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:38:37,159 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:37,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2039623402, now seen corresponding path program 140 times [2021-03-11 00:38:37,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:37,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682648416] [2021-03-11 00:38:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:37,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682648416] [2021-03-11 00:38:37,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622736693] [2021-03-11 00:38:37,259 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 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 [2021-03-11 00:38:37,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:38:37,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:37,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:37,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:38:37,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657040] [2021-03-11 00:38:37,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:38:37,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:38:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:38:37,742 INFO L87 Difference]: Start difference. First operand 37806 states and 146955 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) [2021-03-11 00:38:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:41,349 INFO L93 Difference]: Finished difference Result 63636 states and 236045 transitions. [2021-03-11 00:38:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-11 00:38:41,352 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 [2021-03-11 00:38:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:41,532 INFO L225 Difference]: With dead ends: 63636 [2021-03-11 00:38:41,532 INFO L226 Difference]: Without dead ends: 63636 [2021-03-11 00:38:41,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2326.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:38:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63636 states. [2021-03-11 00:38:42,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63636 to 37828. [2021-03-11 00:38:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8874349009966425) internal successors, (147050), 37827 states have internal predecessors, (147050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147050 transitions. [2021-03-11 00:38:42,959 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147050 transitions. Word has length 28 [2021-03-11 00:38:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:42,959 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147050 transitions. [2021-03-11 00:38:42,959 INFO L481 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) [2021-03-11 00:38:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147050 transitions. [2021-03-11 00:38:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:43,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:43,161 INFO L519 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] [2021-03-11 00:38:43,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-03-11 00:38:43,361 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:43,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash 2120999490, now seen corresponding path program 141 times [2021-03-11 00:38:43,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:43,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221603565] [2021-03-11 00:38:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:43,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221603565] [2021-03-11 00:38:43,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796849883] [2021-03-11 00:38:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:38:43,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:38:43,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:43,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:43,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:43,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:38:43,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662037013] [2021-03-11 00:38:43,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:38:43,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:38:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:38:43,921 INFO L87 Difference]: Start difference. First operand 37828 states and 147050 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) [2021-03-11 00:38:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:47,132 INFO L93 Difference]: Finished difference Result 62782 states and 233841 transitions. [2021-03-11 00:38:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:38:47,135 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 [2021-03-11 00:38:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:47,312 INFO L225 Difference]: With dead ends: 62782 [2021-03-11 00:38:47,312 INFO L226 Difference]: Without dead ends: 62774 [2021-03-11 00:38:47,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1905.4ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:38:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62774 states. [2021-03-11 00:38:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62774 to 37828. [2021-03-11 00:38:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37828 states, 37827 states have (on average 3.8872762841356705) internal successors, (147044), 37827 states have internal predecessors, (147044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37828 states to 37828 states and 147044 transitions. [2021-03-11 00:38:48,568 INFO L78 Accepts]: Start accepts. Automaton has 37828 states and 147044 transitions. Word has length 28 [2021-03-11 00:38:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:48,568 INFO L480 AbstractCegarLoop]: Abstraction has 37828 states and 147044 transitions. [2021-03-11 00:38:48,568 INFO L481 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) [2021-03-11 00:38:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 37828 states and 147044 transitions. [2021-03-11 00:38:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:48,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:48,632 INFO L519 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] [2021-03-11 00:38:48,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:38:48,832 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:48,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1243310590, now seen corresponding path program 142 times [2021-03-11 00:38:48,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:48,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437261263] [2021-03-11 00:38:48,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437261263] [2021-03-11 00:38:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768396150] [2021-03-11 00:38:48,952 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 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 [2021-03-11 00:38:48,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:38:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:48,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:49,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:49,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:38:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480364055] [2021-03-11 00:38:49,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:38:49,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:38:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:38:49,488 INFO L87 Difference]: Start difference. First operand 37828 states and 147044 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) [2021-03-11 00:38:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:53,425 INFO L93 Difference]: Finished difference Result 62315 states and 232613 transitions. [2021-03-11 00:38:53,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:38:53,428 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 [2021-03-11 00:38:53,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:53,594 INFO L225 Difference]: With dead ends: 62315 [2021-03-11 00:38:53,595 INFO L226 Difference]: Without dead ends: 62315 [2021-03-11 00:38:53,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 2251.1ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:38:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62315 states. [2021-03-11 00:38:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62315 to 37836. [2021-03-11 00:38:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.887352980044932) internal successors, (147078), 37835 states have internal predecessors, (147078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:38:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147078 transitions. [2021-03-11 00:38:54,897 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147078 transitions. Word has length 28 [2021-03-11 00:38:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:38:54,897 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147078 transitions. [2021-03-11 00:38:54,897 INFO L481 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) [2021-03-11 00:38:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147078 transitions. [2021-03-11 00:38:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:38:54,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:38:54,962 INFO L519 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] [2021-03-11 00:38:55,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-03-11 00:38:55,162 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:38:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:38:55,162 INFO L82 PathProgramCache]: Analyzing trace with hash 399728564, now seen corresponding path program 143 times [2021-03-11 00:38:55,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:38:55,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44927072] [2021-03-11 00:38:55,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:38:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:38:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:55,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44927072] [2021-03-11 00:38:55,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735364310] [2021-03-11 00:38:55,301 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 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 [2021-03-11 00:38:55,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:38:55,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:38:55,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:38:55,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:38:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:38:55,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:38:55,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:38:55,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566599986] [2021-03-11 00:38:55,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:38:55,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:38:55,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:38:55,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:38:55,805 INFO L87 Difference]: Start difference. First operand 37836 states and 147078 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) [2021-03-11 00:38:58,298 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-03-11 00:38:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:38:59,333 INFO L93 Difference]: Finished difference Result 62082 states and 232029 transitions. [2021-03-11 00:38:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:38:59,336 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 [2021-03-11 00:38:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:38:59,520 INFO L225 Difference]: With dead ends: 62082 [2021-03-11 00:38:59,521 INFO L226 Difference]: Without dead ends: 62074 [2021-03-11 00:38:59,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 2134.4ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:38:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62074 states. [2021-03-11 00:39:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62074 to 37836. [2021-03-11 00:39:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37836 states, 37835 states have (on average 3.8873001189374916) internal successors, (147076), 37835 states have internal predecessors, (147076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37836 states to 37836 states and 147076 transitions. [2021-03-11 00:39:00,856 INFO L78 Accepts]: Start accepts. Automaton has 37836 states and 147076 transitions. Word has length 28 [2021-03-11 00:39:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:00,856 INFO L480 AbstractCegarLoop]: Abstraction has 37836 states and 147076 transitions. [2021-03-11 00:39:00,856 INFO L481 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) [2021-03-11 00:39:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 37836 states and 147076 transitions. [2021-03-11 00:39:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:00,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:00,922 INFO L519 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] [2021-03-11 00:39:01,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:39:01,122 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1403156548, now seen corresponding path program 144 times [2021-03-11 00:39:01,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:01,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103832332] [2021-03-11 00:39:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:01,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103832332] [2021-03-11 00:39:01,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806155487] [2021-03-11 00:39:01,273 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 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 [2021-03-11 00:39:01,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:39:01,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:01,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:01,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:39:01,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338572568] [2021-03-11 00:39:01,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:39:01,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:39:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:39:01,752 INFO L87 Difference]: Start difference. First operand 37836 states and 147076 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) [2021-03-11 00:39:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:05,709 INFO L93 Difference]: Finished difference Result 61556 states and 228528 transitions. [2021-03-11 00:39:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:39:05,713 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 [2021-03-11 00:39:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:06,080 INFO L225 Difference]: With dead ends: 61556 [2021-03-11 00:39:06,081 INFO L226 Difference]: Without dead ends: 61556 [2021-03-11 00:39:06,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 2641.4ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:39:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61556 states. [2021-03-11 00:39:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61556 to 40635. [2021-03-11 00:39:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40635 states, 40634 states have (on average 3.8911748781808337) internal successors, (158114), 40634 states have internal predecessors, (158114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40635 states to 40635 states and 158114 transitions. [2021-03-11 00:39:07,417 INFO L78 Accepts]: Start accepts. Automaton has 40635 states and 158114 transitions. Word has length 28 [2021-03-11 00:39:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:07,417 INFO L480 AbstractCegarLoop]: Abstraction has 40635 states and 158114 transitions. [2021-03-11 00:39:07,417 INFO L481 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) [2021-03-11 00:39:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 40635 states and 158114 transitions. [2021-03-11 00:39:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:07,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:07,483 INFO L519 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] [2021-03-11 00:39:07,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:39:07,684 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:07,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1484532636, now seen corresponding path program 145 times [2021-03-11 00:39:07,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:07,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221973594] [2021-03-11 00:39:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:07,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221973594] [2021-03-11 00:39:07,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267843768] [2021-03-11 00:39:07,811 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 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 [2021-03-11 00:39:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:08,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:08,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:39:08,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029863047] [2021-03-11 00:39:08,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:39:08,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:08,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:39:08,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:39:08,258 INFO L87 Difference]: Start difference. First operand 40635 states and 158114 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) [2021-03-11 00:39:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:11,686 INFO L93 Difference]: Finished difference Result 61051 states and 227204 transitions. [2021-03-11 00:39:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-11 00:39:11,690 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 [2021-03-11 00:39:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:11,867 INFO L225 Difference]: With dead ends: 61051 [2021-03-11 00:39:11,867 INFO L226 Difference]: Without dead ends: 61043 [2021-03-11 00:39:11,867 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2041.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:39:11,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61043 states. [2021-03-11 00:39:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61043 to 40349. [2021-03-11 00:39:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40349 states, 40348 states have (on average 3.8968226430058492) internal successors, (157229), 40348 states have internal predecessors, (157229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40349 states to 40349 states and 157229 transitions. [2021-03-11 00:39:13,262 INFO L78 Accepts]: Start accepts. Automaton has 40349 states and 157229 transitions. Word has length 28 [2021-03-11 00:39:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:13,262 INFO L480 AbstractCegarLoop]: Abstraction has 40349 states and 157229 transitions. [2021-03-11 00:39:13,263 INFO L481 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) [2021-03-11 00:39:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 40349 states and 157229 transitions. [2021-03-11 00:39:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:13,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:13,332 INFO L519 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] [2021-03-11 00:39:13,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:39:13,532 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash -30559336, now seen corresponding path program 146 times [2021-03-11 00:39:13,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:13,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581225574] [2021-03-11 00:39:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:13,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581225574] [2021-03-11 00:39:13,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463482440] [2021-03-11 00:39:13,669 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 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 [2021-03-11 00:39:13,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:39:13,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:13,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:14,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:14,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-03-11 00:39:14,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471134311] [2021-03-11 00:39:14,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:39:14,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:39:14,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:39:14,122 INFO L87 Difference]: Start difference. First operand 40349 states and 157229 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) [2021-03-11 00:39:16,542 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-03-11 00:39:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:16,947 INFO L93 Difference]: Finished difference Result 59500 states and 222919 transitions. [2021-03-11 00:39:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:39:16,950 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 [2021-03-11 00:39:16,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:17,120 INFO L225 Difference]: With dead ends: 59500 [2021-03-11 00:39:17,120 INFO L226 Difference]: Without dead ends: 59476 [2021-03-11 00:39:17,121 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1709.9ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:39:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59476 states. [2021-03-11 00:39:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59476 to 40255. [2021-03-11 00:39:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40255 states, 40254 states have (on average 3.896805286431162) internal successors, (156862), 40254 states have internal predecessors, (156862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40255 states to 40255 states and 156862 transitions. [2021-03-11 00:39:18,584 INFO L78 Accepts]: Start accepts. Automaton has 40255 states and 156862 transitions. Word has length 28 [2021-03-11 00:39:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:18,584 INFO L480 AbstractCegarLoop]: Abstraction has 40255 states and 156862 transitions. [2021-03-11 00:39:18,585 INFO L481 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) [2021-03-11 00:39:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 40255 states and 156862 transitions. [2021-03-11 00:39:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:18,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:18,660 INFO L519 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] [2021-03-11 00:39:18,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:39:18,861 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1566567380, now seen corresponding path program 147 times [2021-03-11 00:39:18,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:18,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103316464] [2021-03-11 00:39:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:39:18,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103316464] [2021-03-11 00:39:18,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004330103] [2021-03-11 00:39:18,992 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 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 [2021-03-11 00:39:19,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:39:19,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:19,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:19,371 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 10 [2021-03-11 00:39:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:19,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:19,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:39:19,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391064929] [2021-03-11 00:39:19,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:39:19,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:19,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:39:19,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:39:19,711 INFO L87 Difference]: Start difference. First operand 40255 states and 156862 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) [2021-03-11 00:39:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:23,690 INFO L93 Difference]: Finished difference Result 60726 states and 226343 transitions. [2021-03-11 00:39:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-11 00:39:23,694 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 [2021-03-11 00:39:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:23,857 INFO L225 Difference]: With dead ends: 60726 [2021-03-11 00:39:23,857 INFO L226 Difference]: Without dead ends: 60726 [2021-03-11 00:39:23,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2460.6ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:39:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60726 states. [2021-03-11 00:39:24,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60726 to 40351. [2021-03-11 00:39:25,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40351 states, 40350 states have (on average 3.8953159851301113) internal successors, (157176), 40350 states have internal predecessors, (157176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40351 states to 40351 states and 157176 transitions. [2021-03-11 00:39:25,150 INFO L78 Accepts]: Start accepts. Automaton has 40351 states and 157176 transitions. Word has length 28 [2021-03-11 00:39:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:25,150 INFO L480 AbstractCegarLoop]: Abstraction has 40351 states and 157176 transitions. [2021-03-11 00:39:25,150 INFO L481 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) [2021-03-11 00:39:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 40351 states and 157176 transitions. [2021-03-11 00:39:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:25,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:25,220 INFO L519 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] [2021-03-11 00:39:25,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-03-11 00:39:25,421 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1085360762, now seen corresponding path program 148 times [2021-03-11 00:39:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:25,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646815148] [2021-03-11 00:39:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:39:25,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646815148] [2021-03-11 00:39:25,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866632900] [2021-03-11 00:39:25,560 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 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 [2021-03-11 00:39:25,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:39:25,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:25,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:25,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:26,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:26,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-11 00:39:26,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866000327] [2021-03-11 00:39:26,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:39:26,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:39:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:39:26,103 INFO L87 Difference]: Start difference. First operand 40351 states and 157176 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) [2021-03-11 00:39:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:29,699 INFO L93 Difference]: Finished difference Result 60292 states and 225103 transitions. [2021-03-11 00:39:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:39:29,703 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 [2021-03-11 00:39:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:29,885 INFO L225 Difference]: With dead ends: 60292 [2021-03-11 00:39:29,885 INFO L226 Difference]: Without dead ends: 60284 [2021-03-11 00:39:29,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 2080.1ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:39:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60284 states. [2021-03-11 00:39:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60284 to 40283. [2021-03-11 00:39:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40283 states, 40282 states have (on average 3.8966287671913014) internal successors, (156964), 40282 states have internal predecessors, (156964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40283 states to 40283 states and 156964 transitions. [2021-03-11 00:39:31,325 INFO L78 Accepts]: Start accepts. Automaton has 40283 states and 156964 transitions. Word has length 28 [2021-03-11 00:39:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:31,325 INFO L480 AbstractCegarLoop]: Abstraction has 40283 states and 156964 transitions. [2021-03-11 00:39:31,325 INFO L481 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) [2021-03-11 00:39:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 40283 states and 156964 transitions. [2021-03-11 00:39:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:31,407 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:31,407 INFO L519 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] [2021-03-11 00:39:31,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-03-11 00:39:31,607 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1942149356, now seen corresponding path program 149 times [2021-03-11 00:39:31,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:31,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089031128] [2021-03-11 00:39:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:39:31,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089031128] [2021-03-11 00:39:31,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929361617] [2021-03-11 00:39:31,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-11 00:39:31,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:39:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:31,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:31,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:32,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:32,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-03-11 00:39:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14313368] [2021-03-11 00:39:32,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:39:32,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:39:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:39:32,266 INFO L87 Difference]: Start difference. First operand 40283 states and 156964 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) [2021-03-11 00:39:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:35,273 INFO L93 Difference]: Finished difference Result 59023 states and 221592 transitions. [2021-03-11 00:39:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:39:35,276 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 [2021-03-11 00:39:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:35,442 INFO L225 Difference]: With dead ends: 59023 [2021-03-11 00:39:35,442 INFO L226 Difference]: Without dead ends: 58999 [2021-03-11 00:39:35,442 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1631.2ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:39:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58999 states. [2021-03-11 00:39:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58999 to 40259. [2021-03-11 00:39:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40259 states, 40258 states have (on average 3.896765860201699) internal successors, (156876), 40258 states have internal predecessors, (156876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40259 states to 40259 states and 156876 transitions. [2021-03-11 00:39:36,779 INFO L78 Accepts]: Start accepts. Automaton has 40259 states and 156876 transitions. Word has length 28 [2021-03-11 00:39:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:36,779 INFO L480 AbstractCegarLoop]: Abstraction has 40259 states and 156876 transitions. [2021-03-11 00:39:36,779 INFO L481 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) [2021-03-11 00:39:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 40259 states and 156876 transitions. [2021-03-11 00:39:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:36,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:36,849 INFO L519 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] [2021-03-11 00:39:37,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-03-11 00:39:37,049 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1119483464, now seen corresponding path program 150 times [2021-03-11 00:39:37,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:37,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793245989] [2021-03-11 00:39:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:37,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793245989] [2021-03-11 00:39:37,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137127977] [2021-03-11 00:39:37,214 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 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 [2021-03-11 00:39:37,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:39:37,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:37,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:37,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:39:37,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14297936] [2021-03-11 00:39:37,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:39:37,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:37,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:39:37,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:39:37,676 INFO L87 Difference]: Start difference. First operand 40259 states and 156876 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) [2021-03-11 00:39:40,074 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-03-11 00:39:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:43,260 INFO L93 Difference]: Finished difference Result 62461 states and 231344 transitions. [2021-03-11 00:39:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-03-11 00:39:43,264 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 [2021-03-11 00:39:43,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:43,612 INFO L225 Difference]: With dead ends: 62461 [2021-03-11 00:39:43,612 INFO L226 Difference]: Without dead ends: 62461 [2021-03-11 00:39:43,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 3817.2ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-03-11 00:39:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62461 states. [2021-03-11 00:39:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62461 to 44583. [2021-03-11 00:39:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44583 states, 44582 states have (on average 3.8468888789197435) internal successors, (171502), 44582 states have internal predecessors, (171502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44583 states to 44583 states and 171502 transitions. [2021-03-11 00:39:45,042 INFO L78 Accepts]: Start accepts. Automaton has 44583 states and 171502 transitions. Word has length 28 [2021-03-11 00:39:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:45,042 INFO L480 AbstractCegarLoop]: Abstraction has 44583 states and 171502 transitions. [2021-03-11 00:39:45,042 INFO L481 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) [2021-03-11 00:39:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 44583 states and 171502 transitions. [2021-03-11 00:39:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:45,120 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:45,120 INFO L519 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] [2021-03-11 00:39:45,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:39:45,323 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1200859552, now seen corresponding path program 151 times [2021-03-11 00:39:45,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:45,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626634737] [2021-03-11 00:39:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:45,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626634737] [2021-03-11 00:39:45,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689242252] [2021-03-11 00:39:45,491 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 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 [2021-03-11 00:39:45,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:45,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:45,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:45,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:45,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:39:45,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782412135] [2021-03-11 00:39:45,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:39:45,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:45,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:39:45,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:39:45,963 INFO L87 Difference]: Start difference. First operand 44583 states and 171502 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) [2021-03-11 00:39:49,470 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-03-11 00:39:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:50,637 INFO L93 Difference]: Finished difference Result 61654 states and 229149 transitions. [2021-03-11 00:39:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-11 00:39:50,640 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 [2021-03-11 00:39:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:50,826 INFO L225 Difference]: With dead ends: 61654 [2021-03-11 00:39:50,826 INFO L226 Difference]: Without dead ends: 61646 [2021-03-11 00:39:50,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 3157.0ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-03-11 00:39:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61646 states. [2021-03-11 00:39:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61646 to 43473. [2021-03-11 00:39:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43473 states, 43472 states have (on average 3.8658216783216783) internal successors, (168055), 43472 states have internal predecessors, (168055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43473 states to 43473 states and 168055 transitions. [2021-03-11 00:39:52,316 INFO L78 Accepts]: Start accepts. Automaton has 43473 states and 168055 transitions. Word has length 28 [2021-03-11 00:39:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:52,316 INFO L480 AbstractCegarLoop]: Abstraction has 43473 states and 168055 transitions. [2021-03-11 00:39:52,316 INFO L481 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) [2021-03-11 00:39:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 43473 states and 168055 transitions. [2021-03-11 00:39:52,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:52,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:52,392 INFO L519 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] [2021-03-11 00:39:52,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-03-11 00:39:52,593 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash -314232420, now seen corresponding path program 152 times [2021-03-11 00:39:52,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:52,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260516646] [2021-03-11 00:39:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:52,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260516646] [2021-03-11 00:39:52,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726430819] [2021-03-11 00:39:52,760 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 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 [2021-03-11 00:39:52,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:39:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:52,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:39:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:53,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:39:53,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:39:53,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424270929] [2021-03-11 00:39:53,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:39:53,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:39:53,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:39:53,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:39:53,173 INFO L87 Difference]: Start difference. First operand 43473 states and 168055 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) [2021-03-11 00:39:54,011 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-03-11 00:39:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:39:57,356 INFO L93 Difference]: Finished difference Result 59916 states and 224368 transitions. [2021-03-11 00:39:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:39:57,359 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 [2021-03-11 00:39:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:39:57,728 INFO L225 Difference]: With dead ends: 59916 [2021-03-11 00:39:57,728 INFO L226 Difference]: Without dead ends: 59892 [2021-03-11 00:39:57,729 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 2823.5ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:39:57,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59892 states. [2021-03-11 00:39:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59892 to 43485. [2021-03-11 00:39:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43485 states, 43484 states have (on average 3.8636969919970565) internal successors, (168009), 43484 states have internal predecessors, (168009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:39:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43485 states to 43485 states and 168009 transitions. [2021-03-11 00:39:59,233 INFO L78 Accepts]: Start accepts. Automaton has 43485 states and 168009 transitions. Word has length 28 [2021-03-11 00:39:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:39:59,233 INFO L480 AbstractCegarLoop]: Abstraction has 43485 states and 168009 transitions. [2021-03-11 00:39:59,233 INFO L481 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) [2021-03-11 00:39:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 43485 states and 168009 transitions. [2021-03-11 00:39:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:39:59,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:39:59,317 INFO L519 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] [2021-03-11 00:39:59,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:39:59,517 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:39:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:39:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1316197732, now seen corresponding path program 153 times [2021-03-11 00:39:59,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:39:59,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479627953] [2021-03-11 00:39:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:39:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:39:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:39:59,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479627953] [2021-03-11 00:39:59,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695260822] [2021-03-11 00:39:59,691 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 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 [2021-03-11 00:39:59,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:39:59,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:39:59,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:39:59,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:00,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:00,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-11 00:40:00,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190484531] [2021-03-11 00:40:00,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:40:00,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:00,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:40:00,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:40:00,155 INFO L87 Difference]: Start difference. First operand 43485 states and 168009 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) [2021-03-11 00:40:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:04,441 INFO L93 Difference]: Finished difference Result 61163 states and 227783 transitions. [2021-03-11 00:40:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:40:04,444 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 [2021-03-11 00:40:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:40:04,630 INFO L225 Difference]: With dead ends: 61163 [2021-03-11 00:40:04,631 INFO L226 Difference]: Without dead ends: 61123 [2021-03-11 00:40:04,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2581.0ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:40:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61123 states. [2021-03-11 00:40:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61123 to 43617. [2021-03-11 00:40:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43617 states, 43616 states have (on average 3.863008987527513) internal successors, (168489), 43616 states have internal predecessors, (168489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:40:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43617 states to 43617 states and 168489 transitions. [2021-03-11 00:40:06,055 INFO L78 Accepts]: Start accepts. Automaton has 43617 states and 168489 transitions. Word has length 28 [2021-03-11 00:40:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:40:06,055 INFO L480 AbstractCegarLoop]: Abstraction has 43617 states and 168489 transitions. [2021-03-11 00:40:06,055 INFO L481 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) [2021-03-11 00:40:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43617 states and 168489 transitions. [2021-03-11 00:40:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:40:06,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:40:06,134 INFO L519 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] [2021-03-11 00:40:06,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:40:06,334 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:40:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:40:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1262992088, now seen corresponding path program 154 times [2021-03-11 00:40:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:40:06,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832703130] [2021-03-11 00:40:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:40:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:06,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832703130] [2021-03-11 00:40:06,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370457852] [2021-03-11 00:40:06,510 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 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 [2021-03-11 00:40:06,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:40:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:40:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:40:06,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:07,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:07,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:40:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199982333] [2021-03-11 00:40:07,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:40:07,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:07,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:40:07,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:40:07,131 INFO L87 Difference]: Start difference. First operand 43617 states and 168489 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) [2021-03-11 00:40:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:12,861 INFO L93 Difference]: Finished difference Result 60432 states and 225635 transitions. [2021-03-11 00:40:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-11 00:40:12,865 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 [2021-03-11 00:40:12,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:40:13,052 INFO L225 Difference]: With dead ends: 60432 [2021-03-11 00:40:13,053 INFO L226 Difference]: Without dead ends: 60432 [2021-03-11 00:40:13,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 4037.4ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-03-11 00:40:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60432 states. [2021-03-11 00:40:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60432 to 44522. [2021-03-11 00:40:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.8534624109970577) internal successors, (171560), 44521 states have internal predecessors, (171560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:40:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 171560 transitions. [2021-03-11 00:40:14,494 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 171560 transitions. Word has length 28 [2021-03-11 00:40:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:40:14,494 INFO L480 AbstractCegarLoop]: Abstraction has 44522 states and 171560 transitions. [2021-03-11 00:40:14,494 INFO L481 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) [2021-03-11 00:40:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 171560 transitions. [2021-03-11 00:40:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:40:14,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:40:14,573 INFO L519 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] [2021-03-11 00:40:14,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:40:14,778 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:40:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:40:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1388936054, now seen corresponding path program 155 times [2021-03-11 00:40:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:40:14,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564616508] [2021-03-11 00:40:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:40:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:14,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564616508] [2021-03-11 00:40:14,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32653522] [2021-03-11 00:40:14,955 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 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 [2021-03-11 00:40:14,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:40:14,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:40:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:40:14,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:15,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:15,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:40:15,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661303403] [2021-03-11 00:40:15,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:40:15,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:40:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:40:15,751 INFO L87 Difference]: Start difference. First operand 44522 states and 171560 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) [2021-03-11 00:40:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:20,754 INFO L93 Difference]: Finished difference Result 59813 states and 223888 transitions. [2021-03-11 00:40:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:40:20,758 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 [2021-03-11 00:40:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:40:20,946 INFO L225 Difference]: With dead ends: 59813 [2021-03-11 00:40:20,946 INFO L226 Difference]: Without dead ends: 59805 [2021-03-11 00:40:20,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 3230.9ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-03-11 00:40:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59805 states. [2021-03-11 00:40:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59805 to 44446. [2021-03-11 00:40:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44446 states, 44445 states have (on average 3.8547418157273032) internal successors, (171324), 44445 states have internal predecessors, (171324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:40:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44446 states to 44446 states and 171324 transitions. [2021-03-11 00:40:22,500 INFO L78 Accepts]: Start accepts. Automaton has 44446 states and 171324 transitions. Word has length 28 [2021-03-11 00:40:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:40:22,500 INFO L480 AbstractCegarLoop]: Abstraction has 44446 states and 171324 transitions. [2021-03-11 00:40:22,500 INFO L481 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) [2021-03-11 00:40:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 44446 states and 171324 transitions. [2021-03-11 00:40:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:40:22,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:40:22,580 INFO L519 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] [2021-03-11 00:40:22,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:40:22,781 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:40:22,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:40:22,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1638574064, now seen corresponding path program 156 times [2021-03-11 00:40:22,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:40:22,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526977225] [2021-03-11 00:40:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:40:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:22,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526977225] [2021-03-11 00:40:22,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565136196] [2021-03-11 00:40:22,957 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 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 [2021-03-11 00:40:22,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:40:22,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:40:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:40:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:23,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:23,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:40:23,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33480144] [2021-03-11 00:40:23,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:40:23,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:23,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:40:23,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:40:23,526 INFO L87 Difference]: Start difference. First operand 44446 states and 171324 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) [2021-03-11 00:40:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:27,849 INFO L93 Difference]: Finished difference Result 59290 states and 222642 transitions. [2021-03-11 00:40:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-03-11 00:40:27,853 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 [2021-03-11 00:40:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:40:28,037 INFO L225 Difference]: With dead ends: 59290 [2021-03-11 00:40:28,037 INFO L226 Difference]: Without dead ends: 59266 [2021-03-11 00:40:28,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2657.6ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:40:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59266 states. [2021-03-11 00:40:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59266 to 44432. [2021-03-11 00:40:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44432 states, 44431 states have (on average 3.8547185523620895) internal successors, (171269), 44431 states have internal predecessors, (171269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:40:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44432 states to 44432 states and 171269 transitions. [2021-03-11 00:40:29,472 INFO L78 Accepts]: Start accepts. Automaton has 44432 states and 171269 transitions. Word has length 28 [2021-03-11 00:40:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:40:29,472 INFO L480 AbstractCegarLoop]: Abstraction has 44432 states and 171269 transitions. [2021-03-11 00:40:29,472 INFO L481 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) [2021-03-11 00:40:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 44432 states and 171269 transitions. [2021-03-11 00:40:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:40:29,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:40:29,551 INFO L519 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] [2021-03-11 00:40:29,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:40:29,752 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:40:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:40:29,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1972807316, now seen corresponding path program 157 times [2021-03-11 00:40:29,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:40:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720144559] [2021-03-11 00:40:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:40:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:29,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720144559] [2021-03-11 00:40:29,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023092761] [2021-03-11 00:40:29,932 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 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 [2021-03-11 00:40:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:40:29,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:30,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:30,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-11 00:40:30,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41771064] [2021-03-11 00:40:30,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:40:30,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:30,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:40:30,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:40:30,452 INFO L87 Difference]: Start difference. First operand 44432 states and 171269 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) [2021-03-11 00:40:32,672 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-03-11 00:40:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:34,790 INFO L93 Difference]: Finished difference Result 59072 states and 221949 transitions. [2021-03-11 00:40:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:40:34,794 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 [2021-03-11 00:40:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:40:34,981 INFO L225 Difference]: With dead ends: 59072 [2021-03-11 00:40:34,982 INFO L226 Difference]: Without dead ends: 59032 [2021-03-11 00:40:34,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2841.5ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:40:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59032 states. [2021-03-11 00:40:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59032 to 44781. [2021-03-11 00:40:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44781 states, 44780 states have (on average 3.856587762393926) internal successors, (172698), 44780 states have internal predecessors, (172698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:40:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44781 states to 44781 states and 172698 transitions. [2021-03-11 00:40:36,504 INFO L78 Accepts]: Start accepts. Automaton has 44781 states and 172698 transitions. Word has length 28 [2021-03-11 00:40:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:40:36,504 INFO L480 AbstractCegarLoop]: Abstraction has 44781 states and 172698 transitions. [2021-03-11 00:40:36,505 INFO L481 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) [2021-03-11 00:40:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 44781 states and 172698 transitions. [2021-03-11 00:40:36,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:40:36,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:40:36,585 INFO L519 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] [2021-03-11 00:40:36,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-03-11 00:40:36,786 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:40:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:40:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1825824890, now seen corresponding path program 158 times [2021-03-11 00:40:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:40:36,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447055820] [2021-03-11 00:40:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:40:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:36,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447055820] [2021-03-11 00:40:36,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313414669] [2021-03-11 00:40:36,976 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 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 [2021-03-11 00:40:36,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:40:36,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:40:36,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:40:36,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:37,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:37,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:40:37,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197721329] [2021-03-11 00:40:37,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:40:37,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:40:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:40:37,778 INFO L87 Difference]: Start difference. First operand 44781 states and 172698 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) [2021-03-11 00:40:42,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:42,637 INFO L93 Difference]: Finished difference Result 71883 states and 267354 transitions. [2021-03-11 00:40:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:40:42,640 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 [2021-03-11 00:40:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:40:42,899 INFO L225 Difference]: With dead ends: 71883 [2021-03-11 00:40:42,899 INFO L226 Difference]: Without dead ends: 71883 [2021-03-11 00:40:42,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 3104.5ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-03-11 00:40:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71883 states. [2021-03-11 00:40:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71883 to 45947. [2021-03-11 00:40:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45947 states, 45946 states have (on average 3.870913681278022) internal successors, (177853), 45946 states have internal predecessors, (177853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:40:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45947 states to 45947 states and 177853 transitions. [2021-03-11 00:40:44,639 INFO L78 Accepts]: Start accepts. Automaton has 45947 states and 177853 transitions. Word has length 28 [2021-03-11 00:40:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:40:44,640 INFO L480 AbstractCegarLoop]: Abstraction has 45947 states and 177853 transitions. [2021-03-11 00:40:44,640 INFO L481 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) [2021-03-11 00:40:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 45947 states and 177853 transitions. [2021-03-11 00:40:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:40:44,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:40:44,723 INFO L519 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] [2021-03-11 00:40:44,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-03-11 00:40:44,924 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:40:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:40:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1151103012, now seen corresponding path program 159 times [2021-03-11 00:40:44,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:40:44,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662565489] [2021-03-11 00:40:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:40:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:45,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662565489] [2021-03-11 00:40:45,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590886482] [2021-03-11 00:40:45,113 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 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 [2021-03-11 00:40:45,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:40:45,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:40:45,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:40:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:45,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:45,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:40:45,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240523691] [2021-03-11 00:40:45,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:40:45,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:45,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:40:45,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:40:45,694 INFO L87 Difference]: Start difference. First operand 45947 states and 177853 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) [2021-03-11 00:40:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:50,436 INFO L93 Difference]: Finished difference Result 65842 states and 248215 transitions. [2021-03-11 00:40:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:40:50,440 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 [2021-03-11 00:40:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:40:50,663 INFO L225 Difference]: With dead ends: 65842 [2021-03-11 00:40:50,663 INFO L226 Difference]: Without dead ends: 65842 [2021-03-11 00:40:50,664 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 2891.0ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:40:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65842 states. [2021-03-11 00:40:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65842 to 45977. [2021-03-11 00:40:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45977 states, 45976 states have (on average 3.8707151557334263) internal successors, (177960), 45976 states have internal predecessors, (177960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:40:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45977 states to 45977 states and 177960 transitions. [2021-03-11 00:40:52,312 INFO L78 Accepts]: Start accepts. Automaton has 45977 states and 177960 transitions. Word has length 28 [2021-03-11 00:40:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:40:52,312 INFO L480 AbstractCegarLoop]: Abstraction has 45977 states and 177960 transitions. [2021-03-11 00:40:52,312 INFO L481 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) [2021-03-11 00:40:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 45977 states and 177960 transitions. [2021-03-11 00:40:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:40:52,396 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:40:52,396 INFO L519 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] [2021-03-11 00:40:52,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-03-11 00:40:52,596 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:40:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:40:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1490504108, now seen corresponding path program 160 times [2021-03-11 00:40:52,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:40:52,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447330021] [2021-03-11 00:40:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:40:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:40:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447330021] [2021-03-11 00:40:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668325977] [2021-03-11 00:40:52,775 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 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 [2021-03-11 00:40:52,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:40:52,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:40:52,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:40:52,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:40:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:40:53,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:40:53,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:40:53,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530858503] [2021-03-11 00:40:53,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:40:53,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:40:53,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:40:53,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:40:53,603 INFO L87 Difference]: Start difference. First operand 45977 states and 177960 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) [2021-03-11 00:40:59,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:40:59,956 INFO L93 Difference]: Finished difference Result 66878 states and 251166 transitions. [2021-03-11 00:40:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-03-11 00:40:59,961 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 [2021-03-11 00:40:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:00,173 INFO L225 Difference]: With dead ends: 66878 [2021-03-11 00:41:00,173 INFO L226 Difference]: Without dead ends: 66878 [2021-03-11 00:41:00,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 4340.1ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-03-11 00:41:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66878 states. [2021-03-11 00:41:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66878 to 46241. [2021-03-11 00:41:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46241 states, 46240 states have (on average 3.867171280276817) internal successors, (178818), 46240 states have internal predecessors, (178818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46241 states to 46241 states and 178818 transitions. [2021-03-11 00:41:01,831 INFO L78 Accepts]: Start accepts. Automaton has 46241 states and 178818 transitions. Word has length 28 [2021-03-11 00:41:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:01,831 INFO L480 AbstractCegarLoop]: Abstraction has 46241 states and 178818 transitions. [2021-03-11 00:41:01,831 INFO L481 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) [2021-03-11 00:41:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 46241 states and 178818 transitions. [2021-03-11 00:41:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:01,918 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:01,918 INFO L519 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] [2021-03-11 00:41:02,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-03-11 00:41:02,119 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:02,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:02,119 INFO L82 PathProgramCache]: Analyzing trace with hash 152535046, now seen corresponding path program 161 times [2021-03-11 00:41:02,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:02,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506696248] [2021-03-11 00:41:02,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:02,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506696248] [2021-03-11 00:41:02,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991465496] [2021-03-11 00:41:02,353 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 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 [2021-03-11 00:41:02,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:41:02,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:03,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:03,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-11 00:41:03,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627481795] [2021-03-11 00:41:03,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:41:03,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:41:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:41:03,021 INFO L87 Difference]: Start difference. First operand 46241 states and 178818 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) [2021-03-11 00:41:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:08,589 INFO L93 Difference]: Finished difference Result 65887 states and 248347 transitions. [2021-03-11 00:41:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-03-11 00:41:08,593 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 [2021-03-11 00:41:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:08,811 INFO L225 Difference]: With dead ends: 65887 [2021-03-11 00:41:08,811 INFO L226 Difference]: Without dead ends: 65883 [2021-03-11 00:41:08,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 3724.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-03-11 00:41:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65883 states. [2021-03-11 00:41:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65883 to 45877. [2021-03-11 00:41:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45877 states, 45876 states have (on average 3.8709128956317027) internal successors, (177582), 45876 states have internal predecessors, (177582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45877 states to 45877 states and 177582 transitions. [2021-03-11 00:41:10,598 INFO L78 Accepts]: Start accepts. Automaton has 45877 states and 177582 transitions. Word has length 28 [2021-03-11 00:41:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:10,598 INFO L480 AbstractCegarLoop]: Abstraction has 45877 states and 177582 transitions. [2021-03-11 00:41:10,598 INFO L481 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) [2021-03-11 00:41:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 45877 states and 177582 transitions. [2021-03-11 00:41:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:10,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:10,713 INFO L519 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] [2021-03-11 00:41:10,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-03-11 00:41:10,913 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:10,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:10,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1936993134, now seen corresponding path program 162 times [2021-03-11 00:41:10,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:10,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005733673] [2021-03-11 00:41:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:11,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005733673] [2021-03-11 00:41:11,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484827740] [2021-03-11 00:41:11,121 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 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 [2021-03-11 00:41:11,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:41:11,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:11,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:11,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:11,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:41:11,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266831574] [2021-03-11 00:41:11,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:41:11,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:41:11,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:41:11,778 INFO L87 Difference]: Start difference. First operand 45877 states and 177582 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) [2021-03-11 00:41:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:15,602 INFO L93 Difference]: Finished difference Result 60177 states and 228553 transitions. [2021-03-11 00:41:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:41:15,606 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 [2021-03-11 00:41:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:15,806 INFO L225 Difference]: With dead ends: 60177 [2021-03-11 00:41:15,806 INFO L226 Difference]: Without dead ends: 60177 [2021-03-11 00:41:15,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2493.3ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-03-11 00:41:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60177 states. [2021-03-11 00:41:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60177 to 45893. [2021-03-11 00:41:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45893 states, 45892 states have (on average 3.8727882855399636) internal successors, (177730), 45892 states have internal predecessors, (177730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45893 states to 45893 states and 177730 transitions. [2021-03-11 00:41:17,441 INFO L78 Accepts]: Start accepts. Automaton has 45893 states and 177730 transitions. Word has length 28 [2021-03-11 00:41:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:17,441 INFO L480 AbstractCegarLoop]: Abstraction has 45893 states and 177730 transitions. [2021-03-11 00:41:17,441 INFO L481 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) [2021-03-11 00:41:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 45893 states and 177730 transitions. [2021-03-11 00:41:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:17,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:17,537 INFO L519 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] [2021-03-11 00:41:17,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:41:17,747 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash -756673454, now seen corresponding path program 163 times [2021-03-11 00:41:17,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:17,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128981482] [2021-03-11 00:41:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:17,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128981482] [2021-03-11 00:41:17,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088860749] [2021-03-11 00:41:17,946 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 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 [2021-03-11 00:41:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:17,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:18,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:18,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:41:18,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203501093] [2021-03-11 00:41:18,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:41:18,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:41:18,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:41:18,546 INFO L87 Difference]: Start difference. First operand 45893 states and 177730 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) [2021-03-11 00:41:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:21,454 INFO L93 Difference]: Finished difference Result 59367 states and 226324 transitions. [2021-03-11 00:41:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:41:21,457 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 [2021-03-11 00:41:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:21,866 INFO L225 Difference]: With dead ends: 59367 [2021-03-11 00:41:21,867 INFO L226 Difference]: Without dead ends: 59355 [2021-03-11 00:41:21,867 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1868.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:41:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59355 states. [2021-03-11 00:41:22,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59355 to 45827. [2021-03-11 00:41:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45827 states, 45826 states have (on average 3.873936193427312) internal successors, (177527), 45826 states have internal predecessors, (177527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45827 states to 45827 states and 177527 transitions. [2021-03-11 00:41:23,171 INFO L78 Accepts]: Start accepts. Automaton has 45827 states and 177527 transitions. Word has length 28 [2021-03-11 00:41:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:23,171 INFO L480 AbstractCegarLoop]: Abstraction has 45827 states and 177527 transitions. [2021-03-11 00:41:23,171 INFO L481 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) [2021-03-11 00:41:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 45827 states and 177527 transitions. [2021-03-11 00:41:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:23,465 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:23,465 INFO L519 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] [2021-03-11 00:41:23,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-03-11 00:41:23,681 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:23,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:23,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1537074702, now seen corresponding path program 164 times [2021-03-11 00:41:23,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:23,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861614594] [2021-03-11 00:41:23,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:23,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861614594] [2021-03-11 00:41:23,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083623626] [2021-03-11 00:41:23,890 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 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 [2021-03-11 00:41:23,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:41:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:23,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:24,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:24,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:41:24,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132908898] [2021-03-11 00:41:24,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:41:24,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:24,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:41:24,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:41:24,521 INFO L87 Difference]: Start difference. First operand 45827 states and 177527 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) [2021-03-11 00:41:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:27,093 INFO L93 Difference]: Finished difference Result 50560 states and 193090 transitions. [2021-03-11 00:41:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:41:27,097 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 [2021-03-11 00:41:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:27,263 INFO L225 Difference]: With dead ends: 50560 [2021-03-11 00:41:27,263 INFO L226 Difference]: Without dead ends: 50560 [2021-03-11 00:41:27,264 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1671.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:41:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50560 states. [2021-03-11 00:41:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50560 to 46035. [2021-03-11 00:41:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46035 states, 46034 states have (on average 3.871464569665899) internal successors, (178219), 46034 states have internal predecessors, (178219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46035 states to 46035 states and 178219 transitions. [2021-03-11 00:41:28,734 INFO L78 Accepts]: Start accepts. Automaton has 46035 states and 178219 transitions. Word has length 28 [2021-03-11 00:41:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:28,735 INFO L480 AbstractCegarLoop]: Abstraction has 46035 states and 178219 transitions. [2021-03-11 00:41:28,735 INFO L481 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) [2021-03-11 00:41:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 46035 states and 178219 transitions. [2021-03-11 00:41:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:28,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:28,823 INFO L519 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] [2021-03-11 00:41:29,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:41:29,023 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:29,023 INFO L82 PathProgramCache]: Analyzing trace with hash 538506736, now seen corresponding path program 165 times [2021-03-11 00:41:29,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:29,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141105586] [2021-03-11 00:41:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:29,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141105586] [2021-03-11 00:41:29,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358605332] [2021-03-11 00:41:29,210 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 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 [2021-03-11 00:41:29,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:41:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:29,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:29,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:41:29,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384922471] [2021-03-11 00:41:29,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:41:29,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:41:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:41:29,814 INFO L87 Difference]: Start difference. First operand 46035 states and 178219 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) [2021-03-11 00:41:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:32,144 INFO L93 Difference]: Finished difference Result 50371 states and 192582 transitions. [2021-03-11 00:41:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:41:32,149 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 [2021-03-11 00:41:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:32,332 INFO L225 Difference]: With dead ends: 50371 [2021-03-11 00:41:32,332 INFO L226 Difference]: Without dead ends: 50367 [2021-03-11 00:41:32,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1359.9ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:41:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50367 states. [2021-03-11 00:41:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50367 to 45975. [2021-03-11 00:41:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45975 states, 45974 states have (on average 3.8723408883281856) internal successors, (178027), 45974 states have internal predecessors, (178027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45975 states to 45975 states and 178027 transitions. [2021-03-11 00:41:33,882 INFO L78 Accepts]: Start accepts. Automaton has 45975 states and 178027 transitions. Word has length 28 [2021-03-11 00:41:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:33,882 INFO L480 AbstractCegarLoop]: Abstraction has 45975 states and 178027 transitions. [2021-03-11 00:41:33,882 INFO L481 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) [2021-03-11 00:41:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 45975 states and 178027 transitions. [2021-03-11 00:41:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:33,978 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:33,978 INFO L519 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] [2021-03-11 00:41:34,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:41:34,178 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:34,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:34,178 INFO L82 PathProgramCache]: Analyzing trace with hash 508703680, now seen corresponding path program 82 times [2021-03-11 00:41:34,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:34,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701733922] [2021-03-11 00:41:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701733922] [2021-03-11 00:41:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581354020] [2021-03-11 00:41:34,374 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 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 [2021-03-11 00:41:34,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:41:34,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:34,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:34,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-11 00:41:34,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157529056] [2021-03-11 00:41:34,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:41:34,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:34,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:41:34,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:41:34,826 INFO L87 Difference]: Start difference. First operand 45975 states and 178027 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) [2021-03-11 00:41:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:36,894 INFO L93 Difference]: Finished difference Result 50452 states and 192814 transitions. [2021-03-11 00:41:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:41:36,898 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 [2021-03-11 00:41:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:37,070 INFO L225 Difference]: With dead ends: 50452 [2021-03-11 00:41:37,070 INFO L226 Difference]: Without dead ends: 50452 [2021-03-11 00:41:37,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1161.5ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:41:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50452 states. [2021-03-11 00:41:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50452 to 46095. [2021-03-11 00:41:38,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.870243415628932) internal successors, (178395), 46094 states have internal predecessors, (178395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 178395 transitions. [2021-03-11 00:41:38,532 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 178395 transitions. Word has length 28 [2021-03-11 00:41:38,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:38,532 INFO L480 AbstractCegarLoop]: Abstraction has 46095 states and 178395 transitions. [2021-03-11 00:41:38,532 INFO L481 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) [2021-03-11 00:41:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 178395 transitions. [2021-03-11 00:41:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:38,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:38,620 INFO L519 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] [2021-03-11 00:41:38,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:41:38,820 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1414052632, now seen corresponding path program 83 times [2021-03-11 00:41:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:38,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990278424] [2021-03-11 00:41:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:41:38,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990278424] [2021-03-11 00:41:38,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344712823] [2021-03-11 00:41:38,985 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 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 [2021-03-11 00:41:39,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:41:39,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:39,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:41:39,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:39,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-11 00:41:39,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291039955] [2021-03-11 00:41:39,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:41:39,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:39,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:41:39,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:41:39,395 INFO L87 Difference]: Start difference. First operand 46095 states and 178395 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) [2021-03-11 00:41:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:41,318 INFO L93 Difference]: Finished difference Result 50630 states and 193451 transitions. [2021-03-11 00:41:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:41:41,322 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 [2021-03-11 00:41:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:41,476 INFO L225 Difference]: With dead ends: 50630 [2021-03-11 00:41:41,476 INFO L226 Difference]: Without dead ends: 50618 [2021-03-11 00:41:41,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 832.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:41:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50618 states. [2021-03-11 00:41:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50618 to 46227. [2021-03-11 00:41:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46227 states, 46226 states have (on average 3.868407389780643) internal successors, (178821), 46226 states have internal predecessors, (178821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:42,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46227 states to 46227 states and 178821 transitions. [2021-03-11 00:41:42,782 INFO L78 Accepts]: Start accepts. Automaton has 46227 states and 178821 transitions. Word has length 28 [2021-03-11 00:41:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:42,782 INFO L480 AbstractCegarLoop]: Abstraction has 46227 states and 178821 transitions. [2021-03-11 00:41:42,782 INFO L481 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) [2021-03-11 00:41:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 46227 states and 178821 transitions. [2021-03-11 00:41:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:42,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:42,868 INFO L519 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] [2021-03-11 00:41:43,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:41:43,075 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash 421559068, now seen corresponding path program 84 times [2021-03-11 00:41:43,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:43,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625622549] [2021-03-11 00:41:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:43,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625622549] [2021-03-11 00:41:43,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894864911] [2021-03-11 00:41:43,267 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 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 [2021-03-11 00:41:43,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:41:43,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-11 00:41:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:43,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:43,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-11 00:41:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078165358] [2021-03-11 00:41:43,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:41:43,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:41:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:41:43,871 INFO L87 Difference]: Start difference. First operand 46227 states and 178821 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) [2021-03-11 00:41:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:45,439 INFO L93 Difference]: Finished difference Result 50594 states and 193367 transitions. [2021-03-11 00:41:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:41:45,443 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 [2021-03-11 00:41:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:45,604 INFO L225 Difference]: With dead ends: 50594 [2021-03-11 00:41:45,604 INFO L226 Difference]: Without dead ends: 50574 [2021-03-11 00:41:45,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 883.2ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:41:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50574 states. [2021-03-11 00:41:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50574 to 46227. [2021-03-11 00:41:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46227 states, 46226 states have (on average 3.8683208583913813) internal successors, (178817), 46226 states have internal predecessors, (178817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46227 states to 46227 states and 178817 transitions. [2021-03-11 00:41:47,171 INFO L78 Accepts]: Start accepts. Automaton has 46227 states and 178817 transitions. Word has length 28 [2021-03-11 00:41:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:47,171 INFO L480 AbstractCegarLoop]: Abstraction has 46227 states and 178817 transitions. [2021-03-11 00:41:47,171 INFO L481 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) [2021-03-11 00:41:47,171 INFO L276 IsEmpty]: Start isEmpty. Operand 46227 states and 178817 transitions. [2021-03-11 00:41:47,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:47,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:47,257 INFO L519 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] [2021-03-11 00:41:47,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-03-11 00:41:47,457 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:47,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1989119940, now seen corresponding path program 166 times [2021-03-11 00:41:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:47,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514660125] [2021-03-11 00:41:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:47,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514660125] [2021-03-11 00:41:47,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297904225] [2021-03-11 00:41:47,638 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 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 [2021-03-11 00:41:47,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:41:47,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:47,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:41:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:48,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:48,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:41:48,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376560515] [2021-03-11 00:41:48,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:41:48,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:48,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:41:48,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:41:48,105 INFO L87 Difference]: Start difference. First operand 46227 states and 178817 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) [2021-03-11 00:41:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:49,682 INFO L93 Difference]: Finished difference Result 51188 states and 196382 transitions. [2021-03-11 00:41:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:41:49,685 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 [2021-03-11 00:41:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:49,863 INFO L225 Difference]: With dead ends: 51188 [2021-03-11 00:41:49,864 INFO L226 Difference]: Without dead ends: 51175 [2021-03-11 00:41:49,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:41:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51175 states. [2021-03-11 00:41:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51175 to 48960. [2021-03-11 00:41:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48960 states, 48959 states have (on average 3.8768152944300334) internal successors, (189805), 48959 states have internal predecessors, (189805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48960 states to 48960 states and 189805 transitions. [2021-03-11 00:41:51,372 INFO L78 Accepts]: Start accepts. Automaton has 48960 states and 189805 transitions. Word has length 28 [2021-03-11 00:41:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:51,372 INFO L480 AbstractCegarLoop]: Abstraction has 48960 states and 189805 transitions. [2021-03-11 00:41:51,372 INFO L481 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) [2021-03-11 00:41:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 48960 states and 189805 transitions. [2021-03-11 00:41:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:51,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:51,466 INFO L519 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] [2021-03-11 00:41:51,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-03-11 00:41:51,666 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1306375610, now seen corresponding path program 167 times [2021-03-11 00:41:51,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:51,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040074544] [2021-03-11 00:41:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:51,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040074544] [2021-03-11 00:41:51,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782109011] [2021-03-11 00:41:51,860 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 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 [2021-03-11 00:41:51,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:41:51,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:51,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:41:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:52,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:52,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:41:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304652620] [2021-03-11 00:41:52,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:41:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:52,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:41:52,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:41:52,350 INFO L87 Difference]: Start difference. First operand 48960 states and 189805 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) [2021-03-11 00:41:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:54,466 INFO L93 Difference]: Finished difference Result 54536 states and 207828 transitions. [2021-03-11 00:41:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:41:54,470 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 [2021-03-11 00:41:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:54,653 INFO L225 Difference]: With dead ends: 54536 [2021-03-11 00:41:54,653 INFO L226 Difference]: Without dead ends: 54536 [2021-03-11 00:41:54,654 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 875.0ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:41:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54536 states. [2021-03-11 00:41:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54536 to 43500. [2021-03-11 00:41:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43500 states, 43499 states have (on average 3.8642957309363433) internal successors, (168093), 43499 states have internal predecessors, (168093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:41:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43500 states to 43500 states and 168093 transitions. [2021-03-11 00:41:56,080 INFO L78 Accepts]: Start accepts. Automaton has 43500 states and 168093 transitions. Word has length 28 [2021-03-11 00:41:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:41:56,080 INFO L480 AbstractCegarLoop]: Abstraction has 43500 states and 168093 transitions. [2021-03-11 00:41:56,081 INFO L481 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) [2021-03-11 00:41:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 43500 states and 168093 transitions. [2021-03-11 00:41:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:41:56,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:41:56,170 INFO L519 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] [2021-03-11 00:41:56,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-03-11 00:41:56,371 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:41:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:41:56,371 INFO L82 PathProgramCache]: Analyzing trace with hash 986257146, now seen corresponding path program 168 times [2021-03-11 00:41:56,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:41:56,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002388112] [2021-03-11 00:41:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:41:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:41:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002388112] [2021-03-11 00:41:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369202919] [2021-03-11 00:41:56,553 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 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 [2021-03-11 00:41:56,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:41:56,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:41:56,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:41:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:41:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:41:57,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:41:57,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:41:57,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281256279] [2021-03-11 00:41:57,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:41:57,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:41:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:41:57,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:41:57,029 INFO L87 Difference]: Start difference. First operand 43500 states and 168093 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) [2021-03-11 00:41:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:41:59,287 INFO L93 Difference]: Finished difference Result 48376 states and 184512 transitions. [2021-03-11 00:41:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:41:59,291 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 [2021-03-11 00:41:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:41:59,446 INFO L225 Difference]: With dead ends: 48376 [2021-03-11 00:41:59,446 INFO L226 Difference]: Without dead ends: 48376 [2021-03-11 00:41:59,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1325.1ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:41:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48376 states. [2021-03-11 00:42:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48376 to 44333. [2021-03-11 00:42:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44333 states, 44332 states have (on average 3.8629206893440404) internal successors, (171251), 44332 states have internal predecessors, (171251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:42:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44333 states to 44333 states and 171251 transitions. [2021-03-11 00:42:00,714 INFO L78 Accepts]: Start accepts. Automaton has 44333 states and 171251 transitions. Word has length 28 [2021-03-11 00:42:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:42:00,714 INFO L480 AbstractCegarLoop]: Abstraction has 44333 states and 171251 transitions. [2021-03-11 00:42:00,714 INFO L481 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) [2021-03-11 00:42:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 44333 states and 171251 transitions. [2021-03-11 00:42:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:42:00,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:42:00,802 INFO L519 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] [2021-03-11 00:42:01,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-03-11 00:42:01,003 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:42:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:42:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash -22913030, now seen corresponding path program 169 times [2021-03-11 00:42:01,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:42:01,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777807138] [2021-03-11 00:42:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:42:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:42:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:01,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777807138] [2021-03-11 00:42:01,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105796886] [2021-03-11 00:42:01,465 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 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 [2021-03-11 00:42:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:42:01,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:42:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:42:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:01,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:42:01,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-11 00:42:01,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123724355] [2021-03-11 00:42:01,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:42:01,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:42:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:42:01,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:42:01,955 INFO L87 Difference]: Start difference. First operand 44333 states and 171251 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) [2021-03-11 00:42:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:42:03,826 INFO L93 Difference]: Finished difference Result 46090 states and 177112 transitions. [2021-03-11 00:42:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:42:03,830 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 [2021-03-11 00:42:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:42:03,983 INFO L225 Difference]: With dead ends: 46090 [2021-03-11 00:42:03,983 INFO L226 Difference]: Without dead ends: 46090 [2021-03-11 00:42:03,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 827.0ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:42:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46090 states. [2021-03-11 00:42:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46090 to 44341. [2021-03-11 00:42:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44341 states, 44340 states have (on average 3.8627649977447) internal successors, (171275), 44340 states have internal predecessors, (171275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:42:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44341 states to 44341 states and 171275 transitions. [2021-03-11 00:42:05,299 INFO L78 Accepts]: Start accepts. Automaton has 44341 states and 171275 transitions. Word has length 28 [2021-03-11 00:42:05,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:42:05,299 INFO L480 AbstractCegarLoop]: Abstraction has 44341 states and 171275 transitions. [2021-03-11 00:42:05,299 INFO L481 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) [2021-03-11 00:42:05,299 INFO L276 IsEmpty]: Start isEmpty. Operand 44341 states and 171275 transitions. [2021-03-11 00:42:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:42:05,384 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:42:05,384 INFO L519 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] [2021-03-11 00:42:05,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:42:05,586 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:42:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:42:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash -120181494, now seen corresponding path program 170 times [2021-03-11 00:42:05,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:42:05,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74163321] [2021-03-11 00:42:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:42:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:42:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:05,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74163321] [2021-03-11 00:42:05,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251166104] [2021-03-11 00:42:05,956 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 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 [2021-03-11 00:42:05,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:42:05,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:42:05,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:42:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:42:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:06,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:42:06,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:42:06,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778194936] [2021-03-11 00:42:06,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:42:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:42:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:42:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:42:06,452 INFO L87 Difference]: Start difference. First operand 44341 states and 171275 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) [2021-03-11 00:42:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:42:08,098 INFO L93 Difference]: Finished difference Result 45810 states and 176190 transitions. [2021-03-11 00:42:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:42:08,102 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 [2021-03-11 00:42:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:42:08,247 INFO L225 Difference]: With dead ends: 45810 [2021-03-11 00:42:08,248 INFO L226 Difference]: Without dead ends: 45810 [2021-03-11 00:42:08,248 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:42:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45810 states. [2021-03-11 00:42:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45810 to 44235. [2021-03-11 00:42:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44235 states, 44234 states have (on average 3.862436135099697) internal successors, (170851), 44234 states have internal predecessors, (170851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:42:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44235 states to 44235 states and 170851 transitions. [2021-03-11 00:42:09,489 INFO L78 Accepts]: Start accepts. Automaton has 44235 states and 170851 transitions. Word has length 28 [2021-03-11 00:42:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:42:09,490 INFO L480 AbstractCegarLoop]: Abstraction has 44235 states and 170851 transitions. [2021-03-11 00:42:09,490 INFO L481 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) [2021-03-11 00:42:09,490 INFO L276 IsEmpty]: Start isEmpty. Operand 44235 states and 170851 transitions. [2021-03-11 00:42:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:42:09,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:42:09,582 INFO L519 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] [2021-03-11 00:42:09,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:42:09,785 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:42:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:42:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash -915745990, now seen corresponding path program 171 times [2021-03-11 00:42:09,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:42:09,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737891793] [2021-03-11 00:42:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:42:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:42:10,615 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:42:10,793 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-11 00:42:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:11,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737891793] [2021-03-11 00:42:11,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764173183] [2021-03-11 00:42:11,180 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 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 [2021-03-11 00:42:11,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:42:11,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:42:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-11 00:42:11,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:42:13,003 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:42:13,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:42:13,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-11 00:42:13,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:42:13,296 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-03-11 00:42:13,298 INFO L628 ElimStorePlain]: treesize reduction 68, result has 39.8 percent of original size [2021-03-11 00:42:13,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:42:13,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:82 [2021-03-11 00:42:13,746 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:42:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:13,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:42:13,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-03-11 00:42:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610231070] [2021-03-11 00:42:13,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:42:13,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:42:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:42:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:42:13,857 INFO L87 Difference]: Start difference. First operand 44235 states and 170851 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) [2021-03-11 00:42:14,631 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-11 00:42:14,859 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-03-11 00:42:15,209 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:42:15,810 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:42:16,606 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:42:16,970 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:42:17,596 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:42:18,301 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-03-11 00:42:19,022 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:42:19,508 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-03-11 00:42:20,310 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-03-11 00:42:20,804 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:42:21,172 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:42:21,880 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-03-11 00:42:22,422 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-11 00:42:23,126 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-03-11 00:42:24,034 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-03-11 00:42:24,477 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-11 00:42:25,572 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-03-11 00:42:26,661 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:42:26,920 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:42:27,905 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-03-11 00:42:28,681 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-03-11 00:42:29,352 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-03-11 00:42:29,750 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-11 00:42:30,410 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-03-11 00:42:30,677 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2021-03-11 00:42:31,110 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:42:31,602 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-11 00:42:32,258 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-11 00:42:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:42:32,508 INFO L93 Difference]: Finished difference Result 51482 states and 191998 transitions. [2021-03-11 00:42:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:42:32,513 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 [2021-03-11 00:42:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:42:32,686 INFO L225 Difference]: With dead ends: 51482 [2021-03-11 00:42:32,686 INFO L226 Difference]: Without dead ends: 51422 [2021-03-11 00:42:32,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 16589.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:42:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51422 states. [2021-03-11 00:42:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51422 to 44332. [2021-03-11 00:42:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44332 states, 44331 states have (on average 3.861857390990503) internal successors, (171200), 44331 states have internal predecessors, (171200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:42:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44332 states to 44332 states and 171200 transitions. [2021-03-11 00:42:33,992 INFO L78 Accepts]: Start accepts. Automaton has 44332 states and 171200 transitions. Word has length 30 [2021-03-11 00:42:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:42:33,992 INFO L480 AbstractCegarLoop]: Abstraction has 44332 states and 171200 transitions. [2021-03-11 00:42:33,992 INFO L481 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) [2021-03-11 00:42:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 44332 states and 171200 transitions. [2021-03-11 00:42:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-11 00:42:34,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:42:34,080 INFO L519 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] [2021-03-11 00:42:34,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:42:34,281 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:42:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:42:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1350823290, now seen corresponding path program 172 times [2021-03-11 00:42:34,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:42:34,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488547714] [2021-03-11 00:42:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:42:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:42:34,920 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:42:35,102 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-11 00:42:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:35,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488547714] [2021-03-11 00:42:35,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947621997] [2021-03-11 00:42:35,491 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 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 [2021-03-11 00:42:35,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:42:35,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:42:35,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:42:35,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:42:37,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:42:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:42:37,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:42:37,108 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 [2021-03-11 00:42:37,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:42:37,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:42:37,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-11 00:42:37,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-03-11 00:42:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:42:37,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:42:37,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-03-11 00:42:37,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226829247] [2021-03-11 00:42:37,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:42:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:42:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:42:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:42:37,292 INFO L87 Difference]: Start difference. First operand 44332 states and 171200 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) [2021-03-11 00:42:37,806 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-03-11 00:42:38,138 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:42:38,599 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:42:39,333 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:42:39,655 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:42:40,486 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-03-11 00:42:41,257 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:42:41,722 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-11 00:42:42,312 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:42:43,048 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-03-11 00:42:43,751 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-03-11 00:42:44,064 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 Received shutdown request... [2021-03-11 00:42:44,447 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-03-11 00:42:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:42:44,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-03-11 00:42:44,647 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:42:44,651 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:42:44,651 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:42:44 BasicIcfg [2021-03-11 00:42:44,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:42:44,652 INFO L168 Benchmark]: Toolchain (without parser) took 838385.33 ms. Allocated memory was 255.9 MB in the beginning and 11.2 GB in the end (delta: 10.9 GB). Free memory was 237.0 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. [2021-03-11 00:42:44,652 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:42:44,652 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.84 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:42:44,652 INFO L168 Benchmark]: Boogie Preprocessor took 15.48 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:42:44,652 INFO L168 Benchmark]: RCFGBuilder took 288.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 237.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. [2021-03-11 00:42:44,652 INFO L168 Benchmark]: TraceAbstraction took 838049.90 ms. Allocated memory was 255.9 MB in the beginning and 11.2 GB in the end (delta: 10.9 GB). Free memory was 236.6 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. [2021-03-11 00:42:44,652 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 0.21 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.84 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 235.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.48 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 288.48 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 237.3 MB in the end (delta: -3.3 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 838049.90 ms. Allocated memory was 255.9 MB in the beginning and 11.2 GB in the end (delta: 10.9 GB). Free memory was 236.6 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was constructing difference of abstraction (44332states) and FLOYD_HOARE automaton (currently 22 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 159ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 837986.7ms, OverallIterations: 258, TraceHistogramMax: 3, EmptinessCheckTime: 5745.0ms, AutomataDifference: 552078.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11273 SDtfs, 71162 SDslu, 85780 SDs, 0 SdLazy, 140194 SolverSat, 12787 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 81573.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16478 GetRequests, 5493 SyntacticMatches, 290 SemanticMatches, 10694 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177764 ImplicationChecksByTransitivity, 373000.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48960occurred in iteration=252, InterpolantAutomatonStates: 9523, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90826.9ms AutomataMinimizationTime, 257 MinimizatonAttempts, 1305502 StatesRemovedByMinimization, 256 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 752.4ms SsaConstructionTime, 2325.2ms SatisfiabilityAnalysisTime, 129648.9ms InterpolantComputationTime, 13730 NumberOfCodeBlocks, 13730 NumberOfCodeBlocksAsserted, 892 NumberOfCheckSat, 13216 ConstructedInterpolants, 118 QuantifiedInterpolants, 128546 SizeOfPredicates, 1117 NumberOfNonLiveVariables, 17883 ConjunctsInSsa, 3790 ConjunctsInUnsatCore, 514 InterpolantComputations, 2 PerfectInterpolantSequences, 1041/4367 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