/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:24:23,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:24:23,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:24:23,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:24:23,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:24:23,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:24:23,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:24:23,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:24:23,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:24:23,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:24:23,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:24:23,784 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:24:23,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:24:23,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:24:23,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:24:23,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:24:23,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:24:23,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:24:23,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:24:23,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:24:23,785 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:24:23,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:24:23,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:24:23,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:24:23,786 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:24:23,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:24:23,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:24:23,786 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:24:23,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:24:23,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:24:24,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:24:24,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:24:24,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:24:24,058 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:24:24,060 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:24:24,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl [2021-07-13 19:24:24,061 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-4.wvr.bpl' [2021-07-13 19:24:24,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:24:24,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:24:24,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:24:24,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:24:24,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:24:24,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:24:24,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:24:24,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:24:24,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:24:24,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... [2021-07-13 19:24:24,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:24:24,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:24:24,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:24:24,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:24:24,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:24:24,197 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:24:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:24:24,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:24:24,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:24:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:24:24,198 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:24:24,198 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:24:24,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:24:24,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:24:24,199 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:24:24,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:24:24,517 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:24:24,517 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 19:24:24,519 INFO L202 PluginConnector]: Adding new model unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:24:24 BoogieIcfgContainer [2021-07-13 19:24:24,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:24:24,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:24:24,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:24:24,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:24:24,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:24:24" (1/2) ... [2021-07-13 19:24:24,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214d0872 and model type unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:24:24, skipping insertion in model container [2021-07-13 19:24:24,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:24:24" (2/2) ... [2021-07-13 19:24:24,523 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.bpl [2021-07-13 19:24:24,527 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:24:24,527 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:24:24,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:24:24,528 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:24:24,552 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:24:24,573 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:24:24,592 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:24:24,592 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:24:24,592 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:24:24,592 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:24:24,592 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:24:24,593 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:24:24,593 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:24:24,593 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:24:24,600 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-07-13 19:24:24,620 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:24:24,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:24,625 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:24,626 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1298021065, now seen corresponding path program 1 times [2021-07-13 19:24:24,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:24,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810717075] [2021-07-13 19:24:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:24,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:24,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810717075] [2021-07-13 19:24:24,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810717075] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:24:24,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:24:24,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:24:24,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762276258] [2021-07-13 19:24:24,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:24:24,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:24:24,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:24:24,819 INFO L87 Difference]: Start difference. First operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 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 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:24,856 INFO L93 Difference]: Finished difference Result 26 states and 43 transitions. [2021-07-13 19:24:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:24:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:24:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:24,865 INFO L225 Difference]: With dead ends: 26 [2021-07-13 19:24:24,865 INFO L226 Difference]: Without dead ends: 18 [2021-07-13 19:24:24,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:24:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-13 19:24:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-13 19:24:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) [2021-07-13 19:24:24,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2021-07-13 19:24:24,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 10 [2021-07-13 19:24:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:24,887 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 32 transitions. [2021-07-13 19:24:24,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 32 transitions. [2021-07-13 19:24:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 19:24:24,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:24,888 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:24,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:24:24,888 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:24,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1253032747, now seen corresponding path program 2 times [2021-07-13 19:24:24,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:24,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614771333] [2021-07-13 19:24:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:24,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:24,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614771333] [2021-07-13 19:24:24,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614771333] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:24:24,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:24:24,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:24:24,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837387756] [2021-07-13 19:24:24,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:24:24,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:24,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:24:24,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:24:24,949 INFO L87 Difference]: Start difference. First operand 18 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:24,976 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-07-13 19:24:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:24:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-07-13 19:24:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:24,977 INFO L225 Difference]: With dead ends: 28 [2021-07-13 19:24:24,977 INFO L226 Difference]: Without dead ends: 23 [2021-07-13 19:24:24,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:24:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-07-13 19:24:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-07-13 19:24:24,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-07-13 19:24:24,987 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-07-13 19:24:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:24,987 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-07-13 19:24:24,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-07-13 19:24:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:24:24,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:24,988 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:24,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:24:24,989 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900165, now seen corresponding path program 1 times [2021-07-13 19:24:24,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:24,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104437435] [2021-07-13 19:24:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:25,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:25,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104437435] [2021-07-13 19:24:25,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104437435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:25,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586742310] [2021-07-13 19:24:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:25,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:24:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:25,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:24:25,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:25,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:25,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:25,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 19:24:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:25,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586742310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:25,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:25,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:24:25,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480868451] [2021-07-13 19:24:25,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:24:25,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:25,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:24:25,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:24:25,350 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:25,396 INFO L93 Difference]: Finished difference Result 30 states and 51 transitions. [2021-07-13 19:24:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:24:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:24:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:25,413 INFO L225 Difference]: With dead ends: 30 [2021-07-13 19:24:25,413 INFO L226 Difference]: Without dead ends: 22 [2021-07-13 19:24:25,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:25,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-07-13 19:24:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-07-13 19:24:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-07-13 19:24:25,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-07-13 19:24:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:25,416 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-07-13 19:24:25,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-07-13 19:24:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:24:25,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:25,416 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:25,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 19:24:25,633 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash 132986681, now seen corresponding path program 2 times [2021-07-13 19:24:25,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:25,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756710736] [2021-07-13 19:24:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:25,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:25,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756710736] [2021-07-13 19:24:25,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756710736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:25,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725327459] [2021-07-13 19:24:25,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:25,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:25,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:25,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:24:25,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:25,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:25,920 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 15 treesize of output 37 [2021-07-13 19:24:25,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:24:25,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:25,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-07-13 19:24:25,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:24:25,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:24:25,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:26,018 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-07-13 19:24:26,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:26,019 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-07-13 19:24:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:26,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725327459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:26,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:26,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:24:26,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282423767] [2021-07-13 19:24:26,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:24:26,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:26,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:24:26,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:24:26,076 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:26,163 INFO L93 Difference]: Finished difference Result 35 states and 68 transitions. [2021-07-13 19:24:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:24:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:24:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:26,164 INFO L225 Difference]: With dead ends: 35 [2021-07-13 19:24:26,164 INFO L226 Difference]: Without dead ends: 30 [2021-07-13 19:24:26,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-07-13 19:24:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2021-07-13 19:24:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 40 transitions. [2021-07-13 19:24:26,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 40 transitions. Word has length 11 [2021-07-13 19:24:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:26,166 INFO L482 AbstractCegarLoop]: Abstraction has 22 states and 40 transitions. [2021-07-13 19:24:26,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 40 transitions. [2021-07-13 19:24:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:24:26,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:26,167 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:26,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:26,377 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash -788714619, now seen corresponding path program 3 times [2021-07-13 19:24:26,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:26,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308375683] [2021-07-13 19:24:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:26,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:26,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308375683] [2021-07-13 19:24:26,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308375683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:26,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795747546] [2021-07-13 19:24:26,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:26,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:24:26,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:24:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:26,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:26,610 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 15 treesize of output 37 [2021-07-13 19:24:26,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 19:24:26,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:26,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2021-07-13 19:24:26,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:24:26,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:24:26,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:26,724 INFO L628 ElimStorePlain]: treesize reduction 34, result has 39.3 percent of original size [2021-07-13 19:24:26,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:26,725 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:73, output treesize:22 [2021-07-13 19:24:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:26,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795747546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:26,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:26,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:24:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173326949] [2021-07-13 19:24:26,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:24:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:24:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:24:26,779 INFO L87 Difference]: Start difference. First operand 22 states and 40 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:26,888 INFO L93 Difference]: Finished difference Result 51 states and 88 transitions. [2021-07-13 19:24:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:24:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:24:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:26,889 INFO L225 Difference]: With dead ends: 51 [2021-07-13 19:24:26,890 INFO L226 Difference]: Without dead ends: 41 [2021-07-13 19:24:26,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-13 19:24:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2021-07-13 19:24:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-07-13 19:24:26,892 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 11 [2021-07-13 19:24:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:26,892 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-07-13 19:24:26,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-07-13 19:24:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:24:26,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:26,893 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:27,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 19:24:27,100 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:27,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1870228548, now seen corresponding path program 1 times [2021-07-13 19:24:27,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:27,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610703305] [2021-07-13 19:24:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:27,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:27,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610703305] [2021-07-13 19:24:27,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610703305] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:24:27,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:24:27,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:24:27,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147414653] [2021-07-13 19:24:27,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:24:27,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:27,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:24:27,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:24:27,120 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:27,133 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2021-07-13 19:24:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:24:27,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:24:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:27,133 INFO L225 Difference]: With dead ends: 29 [2021-07-13 19:24:27,133 INFO L226 Difference]: Without dead ends: 29 [2021-07-13 19:24:27,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:24:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-13 19:24:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-07-13 19:24:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 49 transitions. [2021-07-13 19:24:27,137 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 49 transitions. Word has length 11 [2021-07-13 19:24:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:27,137 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 49 transitions. [2021-07-13 19:24:27,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 49 transitions. [2021-07-13 19:24:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:24:27,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:27,137 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:27,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-07-13 19:24:27,137 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:27,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1515210487, now seen corresponding path program 4 times [2021-07-13 19:24:27,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:27,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298273655] [2021-07-13 19:24:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:27,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:27,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298273655] [2021-07-13 19:24:27,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298273655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:27,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943563867] [2021-07-13 19:24:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:24:27,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:27,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:24:27,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:27,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:27,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-13 19:24:27,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:27,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:27,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:27,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-13 19:24:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:27,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943563867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:27,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:27,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:24:27,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544922329] [2021-07-13 19:24:27,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:27,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:27,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:27,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:27,366 INFO L87 Difference]: Start difference. First operand 27 states and 49 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:27,424 INFO L93 Difference]: Finished difference Result 37 states and 65 transitions. [2021-07-13 19:24:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:24:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:24:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:27,426 INFO L225 Difference]: With dead ends: 37 [2021-07-13 19:24:27,426 INFO L226 Difference]: Without dead ends: 29 [2021-07-13 19:24:27,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-13 19:24:27,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-07-13 19:24:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-07-13 19:24:27,435 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-07-13 19:24:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:27,436 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-07-13 19:24:27,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-07-13 19:24:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:24:27,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:27,436 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:27,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:27,645 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:27,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:27,645 INFO L82 PathProgramCache]: Analyzing trace with hash -228702997, now seen corresponding path program 5 times [2021-07-13 19:24:27,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:27,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020141988] [2021-07-13 19:24:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:27,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:27,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020141988] [2021-07-13 19:24:27,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020141988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:27,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290646633] [2021-07-13 19:24:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:27,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:27,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:27,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:24:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:27,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:27,867 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 17 treesize of output 37 [2021-07-13 19:24:27,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:27,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:27,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-13 19:24:27,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:27,909 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:24:27,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:27,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-07-13 19:24:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:27,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290646633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:27,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:27,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:24:27,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119362186] [2021-07-13 19:24:27,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:27,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:27,945 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:28,041 INFO L93 Difference]: Finished difference Result 40 states and 76 transitions. [2021-07-13 19:24:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:24:28,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:24:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:28,042 INFO L225 Difference]: With dead ends: 40 [2021-07-13 19:24:28,042 INFO L226 Difference]: Without dead ends: 35 [2021-07-13 19:24:28,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-07-13 19:24:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-07-13 19:24:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-07-13 19:24:28,048 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-07-13 19:24:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:28,048 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-07-13 19:24:28,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,048 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-07-13 19:24:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:24:28,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:28,048 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:28,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:24:28,262 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:28,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1150404297, now seen corresponding path program 6 times [2021-07-13 19:24:28,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:28,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789828284] [2021-07-13 19:24:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:28,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789828284] [2021-07-13 19:24:28,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789828284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:28,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171866120] [2021-07-13 19:24:28,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:28,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:24:28,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:28,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:24:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:28,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:28,459 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 17 treesize of output 37 [2021-07-13 19:24:28,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:28,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:28,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-13 19:24:28,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:28,497 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:24:28,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:28,498 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:18 [2021-07-13 19:24:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:28,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171866120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:28,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:28,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:24:28,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712859073] [2021-07-13 19:24:28,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:28,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:28,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:28,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:28,528 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:28,673 INFO L93 Difference]: Finished difference Result 61 states and 110 transitions. [2021-07-13 19:24:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:24:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:24:28,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:28,674 INFO L225 Difference]: With dead ends: 61 [2021-07-13 19:24:28,674 INFO L226 Difference]: Without dead ends: 51 [2021-07-13 19:24:28,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-13 19:24:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 29. [2021-07-13 19:24:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 54 transitions. [2021-07-13 19:24:28,679 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 54 transitions. Word has length 12 [2021-07-13 19:24:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:28,679 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 54 transitions. [2021-07-13 19:24:28,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 54 transitions. [2021-07-13 19:24:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:24:28,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:28,680 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:28,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:28,889 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:28,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1508538870, now seen corresponding path program 1 times [2021-07-13 19:24:28,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:28,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725562819] [2021-07-13 19:24:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:28,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:28,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725562819] [2021-07-13 19:24:28,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725562819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:28,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473314785] [2021-07-13 19:24:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:24:28,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:28,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473314785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:28,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:28,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 19:24:28,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272329482] [2021-07-13 19:24:28,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:24:28,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:28,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:24:28,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:24:28,953 INFO L87 Difference]: Start difference. First operand 29 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:28,977 INFO L93 Difference]: Finished difference Result 59 states and 102 transitions. [2021-07-13 19:24:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:24:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:24:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:28,978 INFO L225 Difference]: With dead ends: 59 [2021-07-13 19:24:28,978 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 19:24:28,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:24:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 19:24:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2021-07-13 19:24:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-07-13 19:24:28,980 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 12 [2021-07-13 19:24:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:28,980 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-07-13 19:24:28,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-07-13 19:24:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 19:24:28,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:28,981 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:29,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:29,199 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:29,199 INFO L82 PathProgramCache]: Analyzing trace with hash -549695156, now seen corresponding path program 2 times [2021-07-13 19:24:29,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:29,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939992594] [2021-07-13 19:24:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:29,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:29,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939992594] [2021-07-13 19:24:29,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939992594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:29,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5234100] [2021-07-13 19:24:29,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:29,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:29,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 19:24:29,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:29,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5234100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:29,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:29,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 19:24:29,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677266924] [2021-07-13 19:24:29,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:24:29,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:29,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:24:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:24:29,273 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:29,310 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2021-07-13 19:24:29,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:24:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 19:24:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:29,311 INFO L225 Difference]: With dead ends: 43 [2021-07-13 19:24:29,311 INFO L226 Difference]: Without dead ends: 43 [2021-07-13 19:24:29,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-13 19:24:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2021-07-13 19:24:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-07-13 19:24:29,313 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 12 [2021-07-13 19:24:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:29,313 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-07-13 19:24:29,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-07-13 19:24:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:24:29,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:29,314 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:29,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:24:29,514 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:29,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1107234939, now seen corresponding path program 7 times [2021-07-13 19:24:29,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:29,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710171716] [2021-07-13 19:24:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:29,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:29,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710171716] [2021-07-13 19:24:29,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710171716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:29,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721028676] [2021-07-13 19:24:29,582 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:29,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:24:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:29,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:29,732 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 19 treesize of output 37 [2021-07-13 19:24:29,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:29,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:29,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:29,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 19:24:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721028676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:29,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:29,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:24:29,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567912278] [2021-07-13 19:24:29,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:29,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:29,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:29,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:29,749 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:29,817 INFO L93 Difference]: Finished difference Result 44 states and 87 transitions. [2021-07-13 19:24:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:24:29,818 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:24:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:29,818 INFO L225 Difference]: With dead ends: 44 [2021-07-13 19:24:29,818 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:24:29,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:24:29,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-07-13 19:24:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-07-13 19:24:29,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-07-13 19:24:29,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:29,822 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-07-13 19:24:29,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,822 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-07-13 19:24:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:24:29,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:29,823 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:30,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:30,037 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash 522117573, now seen corresponding path program 8 times [2021-07-13 19:24:30,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:30,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466396030] [2021-07-13 19:24:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:30,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:30,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466396030] [2021-07-13 19:24:30,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466396030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:30,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879536581] [2021-07-13 19:24:30,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:30,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:30,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:24:30,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:30,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:30,212 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 19 treesize of output 37 [2021-07-13 19:24:30,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:30,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:30,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:30,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 19:24:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879536581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:30,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:30,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:24:30,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8696522] [2021-07-13 19:24:30,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:30,247 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:30,321 INFO L93 Difference]: Finished difference Result 55 states and 100 transitions. [2021-07-13 19:24:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:30,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13 [2021-07-13 19:24:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:30,323 INFO L225 Difference]: With dead ends: 55 [2021-07-13 19:24:30,323 INFO L226 Difference]: Without dead ends: 50 [2021-07-13 19:24:30,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-13 19:24:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-07-13 19:24:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 75 transitions. [2021-07-13 19:24:30,327 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 75 transitions. Word has length 13 [2021-07-13 19:24:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:30,327 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 75 transitions. [2021-07-13 19:24:30,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 75 transitions. [2021-07-13 19:24:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:24:30,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:30,328 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:30,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:30,546 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1113906556, now seen corresponding path program 3 times [2021-07-13 19:24:30,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:30,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125574206] [2021-07-13 19:24:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125574206] [2021-07-13 19:24:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125574206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224163001] [2021-07-13 19:24:30,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:30,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:24:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:24:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224163001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:30,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:30,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:24:30,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950959627] [2021-07-13 19:24:30,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:24:30,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:30,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:24:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:24:30,636 INFO L87 Difference]: Start difference. First operand 37 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:30,665 INFO L93 Difference]: Finished difference Result 85 states and 153 transitions. [2021-07-13 19:24:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:24:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:24:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:30,666 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:24:30,666 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:24:30,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:24:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2021-07-13 19:24:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-07-13 19:24:30,668 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-07-13 19:24:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:30,668 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-07-13 19:24:30,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:30,669 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-07-13 19:24:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:24:30,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:30,669 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:30,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 19:24:30,881 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:30,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:30,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1122826714, now seen corresponding path program 4 times [2021-07-13 19:24:30,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:30,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353489165] [2021-07-13 19:24:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:30,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:30,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353489165] [2021-07-13 19:24:30,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353489165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:30,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546229402] [2021-07-13 19:24:30,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:30,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:30,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:30,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:24:30,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:30,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546229402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:30,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:30,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:24:30,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813128305] [2021-07-13 19:24:30,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:24:30,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:24:30,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:24:30,967 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:31,009 INFO L93 Difference]: Finished difference Result 65 states and 121 transitions. [2021-07-13 19:24:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:24:31,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:24:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:31,010 INFO L225 Difference]: With dead ends: 65 [2021-07-13 19:24:31,010 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:24:31,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:24:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-07-13 19:24:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2021-07-13 19:24:31,012 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2021-07-13 19:24:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:31,012 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2021-07-13 19:24:31,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2021-07-13 19:24:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:24:31,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:31,012 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:31,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:31,229 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1022462021, now seen corresponding path program 9 times [2021-07-13 19:24:31,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:31,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631903726] [2021-07-13 19:24:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:31,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631903726] [2021-07-13 19:24:31,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631903726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149618893] [2021-07-13 19:24:31,270 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:31,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:24:31,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:31,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:24:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:31,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:31,401 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 19 treesize of output 37 [2021-07-13 19:24:31,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:31,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:31,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:31,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 19:24:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:31,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149618893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:31,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:24:31,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053592866] [2021-07-13 19:24:31,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:24:31,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:24:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:31,416 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:31,531 INFO L93 Difference]: Finished difference Result 78 states and 134 transitions. [2021-07-13 19:24:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:24:31,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 13 [2021-07-13 19:24:31,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:31,532 INFO L225 Difference]: With dead ends: 78 [2021-07-13 19:24:31,532 INFO L226 Difference]: Without dead ends: 73 [2021-07-13 19:24:31,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-13 19:24:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-07-13 19:24:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2021-07-13 19:24:31,534 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 13 [2021-07-13 19:24:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:31,534 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2021-07-13 19:24:31,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:24:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2021-07-13 19:24:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:24:31,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:31,534 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:31,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:24:31,749 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1742081348, now seen corresponding path program 5 times [2021-07-13 19:24:31,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:31,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684247800] [2021-07-13 19:24:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:31,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684247800] [2021-07-13 19:24:31,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684247800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137293455] [2021-07-13 19:24:31,777 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:31,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:24:31,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:31,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:24:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:31,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137293455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:31,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:24:31,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028444008] [2021-07-13 19:24:31,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:24:31,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:31,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:24:31,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:24:31,823 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:31,863 INFO L93 Difference]: Finished difference Result 65 states and 130 transitions. [2021-07-13 19:24:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:24:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:31,863 INFO L225 Difference]: With dead ends: 65 [2021-07-13 19:24:31,864 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:24:31,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:24:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2021-07-13 19:24:31,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 91 transitions. [2021-07-13 19:24:31,866 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 91 transitions. Word has length 13 [2021-07-13 19:24:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:31,866 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 91 transitions. [2021-07-13 19:24:31,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 91 transitions. [2021-07-13 19:24:31,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:31,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:31,866 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:32,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:32,084 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:32,084 INFO L82 PathProgramCache]: Analyzing trace with hash -798664521, now seen corresponding path program 10 times [2021-07-13 19:24:32,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:32,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977495753] [2021-07-13 19:24:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:32,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:32,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977495753] [2021-07-13 19:24:32,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977495753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:32,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428420784] [2021-07-13 19:24:32,110 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:32,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:32,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:24:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:32,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428420784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:32,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:32,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:32,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113258695] [2021-07-13 19:24:32,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:32,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:32,160 INFO L87 Difference]: Start difference. First operand 43 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:32,198 INFO L93 Difference]: Finished difference Result 84 states and 148 transitions. [2021-07-13 19:24:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:24:32,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:32,199 INFO L225 Difference]: With dead ends: 84 [2021-07-13 19:24:32,199 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:24:32,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:24:32,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:24:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 43. [2021-07-13 19:24:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 93 transitions. [2021-07-13 19:24:32,202 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 93 transitions. Word has length 14 [2021-07-13 19:24:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:32,202 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 93 transitions. [2021-07-13 19:24:32,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 93 transitions. [2021-07-13 19:24:32,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:32,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:32,203 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:32,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:32,409 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:32,409 INFO L82 PathProgramCache]: Analyzing trace with hash 861067660, now seen corresponding path program 6 times [2021-07-13 19:24:32,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:32,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67087748] [2021-07-13 19:24:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:32,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:32,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67087748] [2021-07-13 19:24:32,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67087748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:32,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32629490] [2021-07-13 19:24:32,434 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:24:32,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:24:32,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:32,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:32,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:32,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32629490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:32,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:32,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:32,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024434754] [2021-07-13 19:24:32,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:32,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:32,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:32,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:32,492 INFO L87 Difference]: Start difference. First operand 43 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:32,564 INFO L93 Difference]: Finished difference Result 106 states and 189 transitions. [2021-07-13 19:24:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:24:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:32,565 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:24:32,565 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:24:32,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:24:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 49. [2021-07-13 19:24:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2916666666666665) internal successors, (110), 48 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 110 transitions. [2021-07-13 19:24:32,567 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 110 transitions. Word has length 14 [2021-07-13 19:24:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:32,567 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 110 transitions. [2021-07-13 19:24:32,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,567 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 110 transitions. [2021-07-13 19:24:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:32,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:32,567 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:32,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:32,783 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash 830687991, now seen corresponding path program 11 times [2021-07-13 19:24:32,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:32,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946395860] [2021-07-13 19:24:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:32,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:32,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946395860] [2021-07-13 19:24:32,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946395860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:32,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417656884] [2021-07-13 19:24:32,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:32,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:24:32,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:24:32,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:32,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417656884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:32,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:32,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:32,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567772962] [2021-07-13 19:24:32,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:32,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:32,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:32,866 INFO L87 Difference]: Start difference. First operand 49 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:32,918 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2021-07-13 19:24:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:32,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:32,919 INFO L225 Difference]: With dead ends: 60 [2021-07-13 19:24:32,919 INFO L226 Difference]: Without dead ends: 58 [2021-07-13 19:24:32,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-13 19:24:32,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-07-13 19:24:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 109 transitions. [2021-07-13 19:24:32,920 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 109 transitions. Word has length 14 [2021-07-13 19:24:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:32,921 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 109 transitions. [2021-07-13 19:24:32,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 109 transitions. [2021-07-13 19:24:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:32,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:32,921 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:33,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 19:24:33,133 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -805336138, now seen corresponding path program 7 times [2021-07-13 19:24:33,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:33,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993338278] [2021-07-13 19:24:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:33,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:33,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993338278] [2021-07-13 19:24:33,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993338278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:33,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776795921] [2021-07-13 19:24:33,161 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:24:33,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:33,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776795921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:33,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:33,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:33,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186815886] [2021-07-13 19:24:33,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:33,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:33,226 INFO L87 Difference]: Start difference. First operand 49 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:33,267 INFO L93 Difference]: Finished difference Result 94 states and 171 transitions. [2021-07-13 19:24:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:24:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:33,268 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:24:33,268 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:24:33,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:24:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:24:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 46. [2021-07-13 19:24:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 97 transitions. [2021-07-13 19:24:33,278 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 97 transitions. Word has length 14 [2021-07-13 19:24:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:33,279 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 97 transitions. [2021-07-13 19:24:33,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 97 transitions. [2021-07-13 19:24:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:33,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:33,280 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:33,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:24:33,493 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:33,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1972248533, now seen corresponding path program 12 times [2021-07-13 19:24:33,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:33,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194632970] [2021-07-13 19:24:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:33,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:33,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194632970] [2021-07-13 19:24:33,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194632970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:33,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253351022] [2021-07-13 19:24:33,521 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:33,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:24:33,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:24:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:33,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253351022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:33,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:33,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:33,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679079622] [2021-07-13 19:24:33,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:33,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:33,576 INFO L87 Difference]: Start difference. First operand 46 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:33,623 INFO L93 Difference]: Finished difference Result 59 states and 113 transitions. [2021-07-13 19:24:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:33,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:33,624 INFO L225 Difference]: With dead ends: 59 [2021-07-13 19:24:33,624 INFO L226 Difference]: Without dead ends: 55 [2021-07-13 19:24:33,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-07-13 19:24:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-07-13 19:24:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2021-07-13 19:24:33,625 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 14 [2021-07-13 19:24:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:33,626 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2021-07-13 19:24:33,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2021-07-13 19:24:33,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:33,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:33,626 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:33,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:24:33,833 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1431397132, now seen corresponding path program 8 times [2021-07-13 19:24:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:33,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594561231] [2021-07-13 19:24:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:33,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594561231] [2021-07-13 19:24:33,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594561231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585214152] [2021-07-13 19:24:33,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:33,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:24:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:33,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585214152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:33,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:33,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:33,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511502336] [2021-07-13 19:24:33,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:33,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:33,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:33,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:33,917 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:33,984 INFO L93 Difference]: Finished difference Result 91 states and 166 transitions. [2021-07-13 19:24:33,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:33,989 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:24:33,989 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:24:33,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:24:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:24:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 47. [2021-07-13 19:24:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 46 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 100 transitions. [2021-07-13 19:24:33,992 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 100 transitions. Word has length 14 [2021-07-13 19:24:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:33,992 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 100 transitions. [2021-07-13 19:24:33,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 100 transitions. [2021-07-13 19:24:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:33,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:33,992 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:34,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:24:34,193 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1331032439, now seen corresponding path program 13 times [2021-07-13 19:24:34,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:34,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849006794] [2021-07-13 19:24:34,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:34,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849006794] [2021-07-13 19:24:34,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849006794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405462446] [2021-07-13 19:24:34,221 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) [2021-07-13 19:24:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:34,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405462446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:34,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:34,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744675406] [2021-07-13 19:24:34,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:34,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:34,276 INFO L87 Difference]: Start difference. First operand 47 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:34,310 INFO L93 Difference]: Finished difference Result 62 states and 119 transitions. [2021-07-13 19:24:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:34,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:34,311 INFO L225 Difference]: With dead ends: 62 [2021-07-13 19:24:34,311 INFO L226 Difference]: Without dead ends: 56 [2021-07-13 19:24:34,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-13 19:24:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-07-13 19:24:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-07-13 19:24:34,312 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-07-13 19:24:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:34,312 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-07-13 19:24:34,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-07-13 19:24:34,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:34,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:34,313 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:34,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:24:34,521 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2050651766, now seen corresponding path program 9 times [2021-07-13 19:24:34,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:34,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67092521] [2021-07-13 19:24:34,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:34,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67092521] [2021-07-13 19:24:34,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67092521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461996482] [2021-07-13 19:24:34,566 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 [2021-07-13 19:24:34,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:24:34,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:24:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461996482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:34,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:34,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049343260] [2021-07-13 19:24:34,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:34,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:34,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:34,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:34,620 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:34,696 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2021-07-13 19:24:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:24:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:34,697 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:24:34,697 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:24:34,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:34,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:24:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-07-13 19:24:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.152173913043478) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 99 transitions. [2021-07-13 19:24:34,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 99 transitions. Word has length 14 [2021-07-13 19:24:34,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:34,700 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 99 transitions. [2021-07-13 19:24:34,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 99 transitions. [2021-07-13 19:24:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:34,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:34,700 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:34,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:34,913 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash 653527467, now seen corresponding path program 14 times [2021-07-13 19:24:34,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:34,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563997332] [2021-07-13 19:24:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:34,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563997332] [2021-07-13 19:24:34,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563997332] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:24:34,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:24:34,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:24:34,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913450536] [2021-07-13 19:24:34,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:24:34,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:34,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:24:34,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:24:34,941 INFO L87 Difference]: Start difference. First operand 47 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:34,959 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2021-07-13 19:24:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:24:34,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:24:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:34,959 INFO L225 Difference]: With dead ends: 53 [2021-07-13 19:24:34,959 INFO L226 Difference]: Without dead ends: 45 [2021-07-13 19:24:34,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:24:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-13 19:24:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-07-13 19:24:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 95 transitions. [2021-07-13 19:24:34,961 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 95 transitions. Word has length 14 [2021-07-13 19:24:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:34,961 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 95 transitions. [2021-07-13 19:24:34,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 95 transitions. [2021-07-13 19:24:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:24:34,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:34,961 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:34,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-07-13 19:24:34,961 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:34,961 INFO L82 PathProgramCache]: Analyzing trace with hash -227291060, now seen corresponding path program 10 times [2021-07-13 19:24:34,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:34,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218301658] [2021-07-13 19:24:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:34,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:34,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218301658] [2021-07-13 19:24:34,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218301658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600407786] [2021-07-13 19:24:34,984 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:35,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:35,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:35,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:24:35,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:35,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600407786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:35,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:35,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:24:35,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669945083] [2021-07-13 19:24:35,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:24:35,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:35,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:24:35,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:24:35,043 INFO L87 Difference]: Start difference. First operand 45 states and 95 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:35,089 INFO L93 Difference]: Finished difference Result 91 states and 185 transitions. [2021-07-13 19:24:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:24:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 14 [2021-07-13 19:24:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:35,090 INFO L225 Difference]: With dead ends: 91 [2021-07-13 19:24:35,090 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:24:35,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:24:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:24:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2021-07-13 19:24:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.2) internal successors, (110), 50 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 110 transitions. [2021-07-13 19:24:35,091 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 110 transitions. Word has length 14 [2021-07-13 19:24:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:35,092 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 110 transitions. [2021-07-13 19:24:35,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 110 transitions. [2021-07-13 19:24:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:35,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:35,092 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:35,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:35,305 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1836816026, now seen corresponding path program 11 times [2021-07-13 19:24:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:35,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668640276] [2021-07-13 19:24:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:35,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668640276] [2021-07-13 19:24:35,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668640276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:35,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275632601] [2021-07-13 19:24:35,367 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:35,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:24:35,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:35,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:24:35,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:35,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:35,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:35,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:35,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:35,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:35,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2021-07-13 19:24:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:35,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275632601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:35,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:35,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:35,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257897206] [2021-07-13 19:24:35,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:35,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:35,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:35,604 INFO L87 Difference]: Start difference. First operand 51 states and 110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:35,714 INFO L93 Difference]: Finished difference Result 66 states and 137 transitions. [2021-07-13 19:24:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:24:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:35,715 INFO L225 Difference]: With dead ends: 66 [2021-07-13 19:24:35,715 INFO L226 Difference]: Without dead ends: 56 [2021-07-13 19:24:35,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-13 19:24:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-07-13 19:24:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 52 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 114 transitions. [2021-07-13 19:24:35,717 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 114 transitions. Word has length 15 [2021-07-13 19:24:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:35,717 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 114 transitions. [2021-07-13 19:24:35,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 114 transitions. [2021-07-13 19:24:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:35,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:35,738 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:35,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:35,949 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash 170412228, now seen corresponding path program 12 times [2021-07-13 19:24:35,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:35,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833333716] [2021-07-13 19:24:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:36,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:36,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833333716] [2021-07-13 19:24:36,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833333716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:36,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081771382] [2021-07-13 19:24:36,008 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:36,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:24:36,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:36,421 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 2061 DAG size of output: 44 [2021-07-13 19:24:36,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:36,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:36,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:36,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:36,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:36,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:24:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:36,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081771382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:36,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:36,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:36,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860566244] [2021-07-13 19:24:36,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:36,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:36,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:36,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:36,478 INFO L87 Difference]: Start difference. First operand 53 states and 114 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:36,652 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-07-13 19:24:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:36,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:36,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:36,653 INFO L225 Difference]: With dead ends: 83 [2021-07-13 19:24:36,653 INFO L226 Difference]: Without dead ends: 69 [2021-07-13 19:24:36,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-13 19:24:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-07-13 19:24:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-07-13 19:24:36,655 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-07-13 19:24:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:36,655 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-07-13 19:24:36,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-07-13 19:24:36,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:36,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:36,655 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:36,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 19:24:36,861 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:36,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1029286758, now seen corresponding path program 13 times [2021-07-13 19:24:36,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:36,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808624619] [2021-07-13 19:24:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:36,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:36,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808624619] [2021-07-13 19:24:36,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808624619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:36,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968862047] [2021-07-13 19:24:36,931 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:37,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:37,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:37,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:37,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:37,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:37,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:37,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:37,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:37,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:37,261 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:37,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:37,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:37,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968862047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:37,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:37,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:37,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045385065] [2021-07-13 19:24:37,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:37,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:37,287 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:37,444 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-07-13 19:24:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:37,444 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:24:37,444 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:24:37,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:24:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2021-07-13 19:24:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3333333333333335) internal successors, (133), 57 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 133 transitions. [2021-07-13 19:24:37,447 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 133 transitions. Word has length 15 [2021-07-13 19:24:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:37,447 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 133 transitions. [2021-07-13 19:24:37,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:37,447 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 133 transitions. [2021-07-13 19:24:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:37,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:37,447 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:37,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:37,661 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1887821798, now seen corresponding path program 14 times [2021-07-13 19:24:37,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:37,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916006059] [2021-07-13 19:24:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:37,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:37,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916006059] [2021-07-13 19:24:37,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916006059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:37,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72937788] [2021-07-13 19:24:37,718 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:37,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:37,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:37,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:37,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:37,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:37,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:37,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:37,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:37,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:24:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:37,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72937788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:37,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:37,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:37,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964132276] [2021-07-13 19:24:37,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:37,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:37,915 INFO L87 Difference]: Start difference. First operand 58 states and 133 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:38,093 INFO L93 Difference]: Finished difference Result 93 states and 210 transitions. [2021-07-13 19:24:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:38,094 INFO L225 Difference]: With dead ends: 93 [2021-07-13 19:24:38,094 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:24:38,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:24:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-07-13 19:24:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.515151515151515) internal successors, (166), 66 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 166 transitions. [2021-07-13 19:24:38,099 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 166 transitions. Word has length 15 [2021-07-13 19:24:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:38,099 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 166 transitions. [2021-07-13 19:24:38,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 166 transitions. [2021-07-13 19:24:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:38,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:38,099 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:38,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 19:24:38,309 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1028947268, now seen corresponding path program 15 times [2021-07-13 19:24:38,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:38,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356311619] [2021-07-13 19:24:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:38,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:38,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:38,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356311619] [2021-07-13 19:24:38,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356311619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:38,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492813189] [2021-07-13 19:24:38,368 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:38,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:24:38,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:38,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:38,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:38,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:38,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:38,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:38,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:38,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:38,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:38,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:38,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:38,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:38,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:38,632 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:38,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:38,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:38,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492813189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:38,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:38,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:38,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551360878] [2021-07-13 19:24:38,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:38,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:38,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:38,656 INFO L87 Difference]: Start difference. First operand 67 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:38,916 INFO L93 Difference]: Finished difference Result 119 states and 261 transitions. [2021-07-13 19:24:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:38,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:38,917 INFO L225 Difference]: With dead ends: 119 [2021-07-13 19:24:38,917 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:24:38,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:24:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:24:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-07-13 19:24:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-07-13 19:24:38,919 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-07-13 19:24:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:38,919 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-07-13 19:24:38,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-07-13 19:24:38,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:38,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:38,919 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:39,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:39,120 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:39,120 INFO L82 PathProgramCache]: Analyzing trace with hash 681666040, now seen corresponding path program 16 times [2021-07-13 19:24:39,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:39,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200512092] [2021-07-13 19:24:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:39,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200512092] [2021-07-13 19:24:39,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200512092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:39,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894067378] [2021-07-13 19:24:39,181 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:39,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:39,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:39,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:39,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:39,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:39,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:39,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:39,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:39,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:39,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:39,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:39,457 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:39,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:39,457 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:39,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894067378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:39,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:39,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:39,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478479159] [2021-07-13 19:24:39,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:39,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:39,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:39,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:39,479 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:39,662 INFO L93 Difference]: Finished difference Result 98 states and 230 transitions. [2021-07-13 19:24:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:39,662 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:24:39,662 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:24:39,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:24:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 67. [2021-07-13 19:24:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5) internal successors, (165), 66 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-07-13 19:24:39,664 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 15 [2021-07-13 19:24:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:39,664 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-07-13 19:24:39,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-07-13 19:24:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:39,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:39,665 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:39,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-13 19:24:39,877 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1268567164, now seen corresponding path program 17 times [2021-07-13 19:24:39,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:39,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464366940] [2021-07-13 19:24:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:39,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464366940] [2021-07-13 19:24:39,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464366940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660196446] [2021-07-13 19:24:39,933 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:39,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:24:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:39,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:40,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:40,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:40,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:40,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:40,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:40,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:24:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:40,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660196446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:40,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:40,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:40,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404121964] [2021-07-13 19:24:40,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:40,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:40,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:40,133 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:40,285 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2021-07-13 19:24:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:40,286 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:24:40,286 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 19:24:40,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:40,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 19:24:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-07-13 19:24:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-13 19:24:40,288 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-13 19:24:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:40,288 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-13 19:24:40,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-13 19:24:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:40,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:40,289 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:40,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:40,493 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash -409692634, now seen corresponding path program 18 times [2021-07-13 19:24:40,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:40,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555714838] [2021-07-13 19:24:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:40,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:40,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555714838] [2021-07-13 19:24:40,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555714838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:40,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835961069] [2021-07-13 19:24:40,547 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:40,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:24:40,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:40,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:40,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:40,770 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 44 [2021-07-13 19:24:40,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:40,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:40,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:40,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:40,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:40,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:40,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:40,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:40,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:40,930 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:40,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:40,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:40,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835961069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:40,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:40,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:40,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65215467] [2021-07-13 19:24:40,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:40,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:40,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:40,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:40,952 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:41,154 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-07-13 19:24:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:41,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:41,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:41,155 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:24:41,155 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:24:41,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:24:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:24:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 76. [2021-07-13 19:24:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-13 19:24:41,157 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-13 19:24:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:41,157 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-13 19:24:41,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-13 19:24:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:41,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:41,158 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:41,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-13 19:24:41,365 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1300920674, now seen corresponding path program 19 times [2021-07-13 19:24:41,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:41,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455938856] [2021-07-13 19:24:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:41,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:41,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455938856] [2021-07-13 19:24:41,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455938856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:41,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433194487] [2021-07-13 19:24:41,422 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:41,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:41,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:41,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:41,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:41,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:41,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:41,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:41,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:41,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:41,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:41,675 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:41,687 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:41,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:41,688 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:41,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433194487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:41,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:41,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:41,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955467240] [2021-07-13 19:24:41,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:41,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:41,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:41,711 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:41,961 INFO L93 Difference]: Finished difference Result 104 states and 252 transitions. [2021-07-13 19:24:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:24:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:41,961 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:24:41,962 INFO L226 Difference]: Without dead ends: 99 [2021-07-13 19:24:41,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:24:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-07-13 19:24:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-07-13 19:24:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-13 19:24:41,963 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-13 19:24:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:41,964 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-13 19:24:41,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-13 19:24:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:41,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:41,964 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:42,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-13 19:24:42,173 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1504641626, now seen corresponding path program 20 times [2021-07-13 19:24:42,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:42,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522917733] [2021-07-13 19:24:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:42,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522917733] [2021-07-13 19:24:42,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522917733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:42,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584641225] [2021-07-13 19:24:42,228 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:42,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:42,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:42,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:42,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:42,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:42,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:42,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:42,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:42,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:42,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:42,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:42,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:42,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:42,540 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:42,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:42,541 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:42,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584641225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:42,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:42,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:42,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442316010] [2021-07-13 19:24:42,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:42,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:42,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:42,568 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:42,839 INFO L93 Difference]: Finished difference Result 121 states and 292 transitions. [2021-07-13 19:24:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:42,840 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:24:42,840 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:24:42,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:24:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:24:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2021-07-13 19:24:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6266666666666665) internal successors, (197), 75 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-07-13 19:24:42,842 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 15 [2021-07-13 19:24:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:42,846 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-07-13 19:24:42,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:42,847 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-07-13 19:24:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:42,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:42,847 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:43,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-13 19:24:43,057 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash 748457306, now seen corresponding path program 21 times [2021-07-13 19:24:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:43,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681511686] [2021-07-13 19:24:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:43,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681511686] [2021-07-13 19:24:43,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681511686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261426270] [2021-07-13 19:24:43,112 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:43,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:24:43,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:43,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:43,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:43,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:43,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:43,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:43,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:43,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:43,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:24:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:43,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261426270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:43,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:43,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:43,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288698178] [2021-07-13 19:24:43,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:43,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:43,317 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:43,462 INFO L93 Difference]: Finished difference Result 107 states and 266 transitions. [2021-07-13 19:24:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:43,463 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:24:43,463 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:24:43,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:24:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-07-13 19:24:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-13 19:24:43,465 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-13 19:24:43,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:43,466 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-13 19:24:43,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-13 19:24:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:43,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:43,466 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:43,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-07-13 19:24:43,673 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1607331836, now seen corresponding path program 22 times [2021-07-13 19:24:43,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:43,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375317310] [2021-07-13 19:24:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:43,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375317310] [2021-07-13 19:24:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375317310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855679884] [2021-07-13 19:24:43,738 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:43,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:43,999 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 2072 DAG size of output: 44 [2021-07-13 19:24:44,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:44,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:44,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:44,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:44,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:44,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:44,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:44,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:44,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:44,151 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:44,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:44,152 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:44,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855679884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:44,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:44,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:44,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853070947] [2021-07-13 19:24:44,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:44,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:44,177 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:44,425 INFO L93 Difference]: Finished difference Result 129 states and 314 transitions. [2021-07-13 19:24:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:24:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:44,426 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:24:44,426 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:24:44,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:24:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-07-13 19:24:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-13 19:24:44,429 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-13 19:24:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:44,429 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-13 19:24:44,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-13 19:24:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:44,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:44,429 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:44,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:44,637 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash -977022152, now seen corresponding path program 23 times [2021-07-13 19:24:44,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:44,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246209342] [2021-07-13 19:24:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:44,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:44,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246209342] [2021-07-13 19:24:44,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246209342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:44,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019649672] [2021-07-13 19:24:44,698 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:44,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:24:44,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:45,682 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 2608 DAG size of output: 45 [2021-07-13 19:24:45,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:45,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:45,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:45,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:45,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:45,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:45,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:45,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:45,872 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:45,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:45,873 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:45,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019649672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:45,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:45,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:45,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138867830] [2021-07-13 19:24:45,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:45,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:45,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:45,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:45,895 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:46,094 INFO L93 Difference]: Finished difference Result 111 states and 280 transitions. [2021-07-13 19:24:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:24:46,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:46,095 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:24:46,095 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:24:46,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:24:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-07-13 19:24:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-13 19:24:46,097 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-13 19:24:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:46,097 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-13 19:24:46,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-13 19:24:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:46,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:46,098 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:46,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-13 19:24:46,309 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 512382844, now seen corresponding path program 24 times [2021-07-13 19:24:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:46,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685357773] [2021-07-13 19:24:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:46,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:46,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685357773] [2021-07-13 19:24:46,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685357773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:46,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576324705] [2021-07-13 19:24:46,375 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:46,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:24:46,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:46,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:46,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:46,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:46,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:46,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:46,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:46,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:46,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:46,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:46,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:46,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:46,652 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:46,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:46,653 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:46,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576324705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:46,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:46,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463478184] [2021-07-13 19:24:46,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:46,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:46,676 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:46,966 INFO L93 Difference]: Finished difference Result 125 states and 307 transitions. [2021-07-13 19:24:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:46,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:46,966 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:24:46,967 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:24:46,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:24:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:24:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2021-07-13 19:24:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-13 19:24:46,969 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-13 19:24:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:46,969 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-13 19:24:46,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-13 19:24:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:46,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:46,970 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:47,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 19:24:47,177 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash -560702536, now seen corresponding path program 25 times [2021-07-13 19:24:47,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:47,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084208903] [2021-07-13 19:24:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084208903] [2021-07-13 19:24:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084208903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285205365] [2021-07-13 19:24:47,232 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:47,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:47,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:47,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:47,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:47,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:47,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:47,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:47,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:47,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:47,505 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:47,525 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:47,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:47,526 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:47,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285205365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:47,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:47,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:47,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741624587] [2021-07-13 19:24:47,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:47,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:47,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:47,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:47,551 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:47,880 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2021-07-13 19:24:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:47,881 INFO L225 Difference]: With dead ends: 139 [2021-07-13 19:24:47,881 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:24:47,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:24:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:24:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-07-13 19:24:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 228 transitions. [2021-07-13 19:24:47,883 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 228 transitions. Word has length 15 [2021-07-13 19:24:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:47,883 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 228 transitions. [2021-07-13 19:24:47,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 228 transitions. [2021-07-13 19:24:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:47,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:47,884 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:48,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 19:24:48,089 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1148293564, now seen corresponding path program 26 times [2021-07-13 19:24:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:48,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405977867] [2021-07-13 19:24:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:48,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:48,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405977867] [2021-07-13 19:24:48,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405977867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:48,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026024165] [2021-07-13 19:24:48,145 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:48,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:48,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:48,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:48,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:48,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:48,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:48,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:48,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:48,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-13 19:24:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026024165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:48,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:48,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:48,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323108944] [2021-07-13 19:24:48,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:48,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:48,339 INFO L87 Difference]: Start difference. First operand 85 states and 228 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:48,523 INFO L93 Difference]: Finished difference Result 117 states and 300 transitions. [2021-07-13 19:24:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:48,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:48,524 INFO L225 Difference]: With dead ends: 117 [2021-07-13 19:24:48,524 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:24:48,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:24:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:24:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-07-13 19:24:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-13 19:24:48,527 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-13 19:24:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:48,527 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-13 19:24:48,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-13 19:24:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:48,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:48,527 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 19:24:48,729 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -289419034, now seen corresponding path program 27 times [2021-07-13 19:24:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794984714] [2021-07-13 19:24:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:48,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794984714] [2021-07-13 19:24:48,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794984714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:48,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249037062] [2021-07-13 19:24:48,790 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:48,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:24:48,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:48,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:49,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:49,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:49,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:49,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:49,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:49,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:49,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:49,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:49,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:49,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:49,133 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:49,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:49,134 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:49,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249037062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:49,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:49,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:49,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618077116] [2021-07-13 19:24:49,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:49,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:49,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:49,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:49,158 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:49,419 INFO L93 Difference]: Finished difference Result 141 states and 356 transitions. [2021-07-13 19:24:49,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:24:49,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:49,420 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:24:49,420 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:24:49,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:24:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:24:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-07-13 19:24:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-13 19:24:49,423 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-13 19:24:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:49,423 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-13 19:24:49,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-13 19:24:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:49,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:49,423 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:49,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:49,636 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:49,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1421194274, now seen corresponding path program 28 times [2021-07-13 19:24:49,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:49,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389296160] [2021-07-13 19:24:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:49,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:49,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389296160] [2021-07-13 19:24:49,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389296160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:49,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232837379] [2021-07-13 19:24:49,692 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:49,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:49,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:49,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:49,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:49,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:49,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:49,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:49,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:49,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:49,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:49,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:49,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:50,009 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:50,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:50,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:50,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232837379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:50,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:50,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:50,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717241646] [2021-07-13 19:24:50,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:50,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:50,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:50,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:50,035 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:50,226 INFO L93 Difference]: Finished difference Result 128 states and 330 transitions. [2021-07-13 19:24:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:50,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:50,227 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:24:50,227 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:24:50,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:24:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-07-13 19:24:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-13 19:24:50,229 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-13 19:24:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:50,229 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-13 19:24:50,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-13 19:24:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:50,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:50,230 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:50,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:50,437 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1384368026, now seen corresponding path program 29 times [2021-07-13 19:24:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:50,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645948348] [2021-07-13 19:24:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:50,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:50,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645948348] [2021-07-13 19:24:50,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645948348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:50,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250395809] [2021-07-13 19:24:50,496 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:50,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:24:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:50,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:50,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:50,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:50,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:50,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:50,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:50,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:50,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:50,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:50,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:50,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:50,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:50,832 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:50,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:50,833 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:50,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250395809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:50,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:50,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:50,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662780746] [2021-07-13 19:24:50,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:50,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:50,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:50,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:50,857 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:51,088 INFO L93 Difference]: Finished difference Result 142 states and 360 transitions. [2021-07-13 19:24:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:51,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:51,093 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:24:51,093 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 19:24:51,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:24:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 19:24:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 94. [2021-07-13 19:24:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-13 19:24:51,095 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-13 19:24:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:51,095 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-13 19:24:51,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-13 19:24:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:51,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:51,096 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:51,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:51,305 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:51,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:51,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1837513890, now seen corresponding path program 30 times [2021-07-13 19:24:51,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:51,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853650805] [2021-07-13 19:24:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:51,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:51,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853650805] [2021-07-13 19:24:51,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853650805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:51,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420032003] [2021-07-13 19:24:51,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:51,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:24:51,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:51,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:51,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:51,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:51,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:51,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:51,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:51,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:51,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:51,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:51,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:51,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:51,676 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:51,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:51,676 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:51,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420032003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:51,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:51,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:51,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666280966] [2021-07-13 19:24:51,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:51,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:51,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:51,703 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:52,044 INFO L93 Difference]: Finished difference Result 154 states and 387 transitions. [2021-07-13 19:24:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:52,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:52,049 INFO L225 Difference]: With dead ends: 154 [2021-07-13 19:24:52,049 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:24:52,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:24:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:24:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 94. [2021-07-13 19:24:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.78494623655914) internal successors, (259), 93 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 259 transitions. [2021-07-13 19:24:52,052 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 259 transitions. Word has length 15 [2021-07-13 19:24:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:52,052 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 259 transitions. [2021-07-13 19:24:52,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 259 transitions. [2021-07-13 19:24:52,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:24:52,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:52,052 INFO L508 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:52,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:52,268 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1363361818, now seen corresponding path program 31 times [2021-07-13 19:24:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:52,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361129454] [2021-07-13 19:24:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:52,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361129454] [2021-07-13 19:24:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361129454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533996546] [2021-07-13 19:24:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:24:52,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:52,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 25 treesize of output 99 [2021-07-13 19:24:52,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:52,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:52,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:52,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:24:52,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:52,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:52,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-13 19:24:52,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:52,654 INFO L628 ElimStorePlain]: treesize reduction 12, result has 55.6 percent of original size [2021-07-13 19:24:52,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:52,654 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:126, output treesize:15 [2021-07-13 19:24:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:52,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533996546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:52,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:52,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:24:52,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689978631] [2021-07-13 19:24:52,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:52,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:52,675 INFO L87 Difference]: Start difference. First operand 94 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:53,019 INFO L93 Difference]: Finished difference Result 159 states and 400 transitions. [2021-07-13 19:24:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:53,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:24:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:53,020 INFO L225 Difference]: With dead ends: 159 [2021-07-13 19:24:53,020 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 19:24:53,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:24:53,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 19:24:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 96. [2021-07-13 19:24:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.7578947368421054) internal successors, (262), 95 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 262 transitions. [2021-07-13 19:24:53,022 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 262 transitions. Word has length 15 [2021-07-13 19:24:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:53,022 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 262 transitions. [2021-07-13 19:24:53,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 262 transitions. [2021-07-13 19:24:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:53,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:53,023 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:53,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-07-13 19:24:53,239 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2020244300, now seen corresponding path program 32 times [2021-07-13 19:24:53,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:53,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424909556] [2021-07-13 19:24:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:53,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:53,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424909556] [2021-07-13 19:24:53,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424909556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:53,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513987508] [2021-07-13 19:24:53,328 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:53,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:53,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:53,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:24:53,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:53,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:53,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:24:53,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:53,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:53,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:53,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:24:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:53,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513987508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:53,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:53,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:24:53,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151599411] [2021-07-13 19:24:53,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:24:53,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:53,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:24:53,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:53,575 INFO L87 Difference]: Start difference. First operand 96 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:53,756 INFO L93 Difference]: Finished difference Result 123 states and 314 transitions. [2021-07-13 19:24:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:24:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:53,757 INFO L225 Difference]: With dead ends: 123 [2021-07-13 19:24:53,757 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:24:53,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:24:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-07-13 19:24:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.7346938775510203) internal successors, (268), 98 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 268 transitions. [2021-07-13 19:24:53,759 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 268 transitions. Word has length 16 [2021-07-13 19:24:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:53,759 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 268 transitions. [2021-07-13 19:24:53,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 268 transitions. [2021-07-13 19:24:53,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:53,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:53,760 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:53,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:53,973 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:53,973 INFO L82 PathProgramCache]: Analyzing trace with hash 353840502, now seen corresponding path program 33 times [2021-07-13 19:24:53,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:53,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059910996] [2021-07-13 19:24:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059910996] [2021-07-13 19:24:54,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059910996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:54,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190128994] [2021-07-13 19:24:54,061 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:54,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:24:54,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:54,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:24:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:54,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:54,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:24:54,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:54,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:54,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:54,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:24:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:54,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190128994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:54,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:54,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:24:54,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474187941] [2021-07-13 19:24:54,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:24:54,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:54,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:24:54,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:54,326 INFO L87 Difference]: Start difference. First operand 99 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:54,560 INFO L93 Difference]: Finished difference Result 118 states and 307 transitions. [2021-07-13 19:24:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:54,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:54,561 INFO L225 Difference]: With dead ends: 118 [2021-07-13 19:24:54,561 INFO L226 Difference]: Without dead ends: 109 [2021-07-13 19:24:54,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-07-13 19:24:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-07-13 19:24:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-07-13 19:24:54,564 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-07-13 19:24:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:54,564 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-07-13 19:24:54,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-07-13 19:24:54,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:54,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:54,564 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:54,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable757 [2021-07-13 19:24:54,781 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1212715032, now seen corresponding path program 34 times [2021-07-13 19:24:54,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:54,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865553645] [2021-07-13 19:24:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:54,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865553645] [2021-07-13 19:24:54,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865553645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719079117] [2021-07-13 19:24:54,873 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:54,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:54,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:54,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:24:54,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:55,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:55,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:24:55,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:55,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:55,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:24:55,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:55,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:55,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:24:55,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:55,650 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:24:55,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:55,651 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:24:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:55,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719079117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:55,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:55,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:24:55,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102528933] [2021-07-13 19:24:55,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:24:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:55,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:24:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:55,679 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:55,924 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2021-07-13 19:24:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:24:55,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:55,926 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:24:55,926 INFO L226 Difference]: Without dead ends: 130 [2021-07-13 19:24:55,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:24:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-13 19:24:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-07-13 19:24:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.727272727272727) internal successors, (270), 99 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 270 transitions. [2021-07-13 19:24:55,929 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 270 transitions. Word has length 16 [2021-07-13 19:24:55,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:55,929 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 270 transitions. [2021-07-13 19:24:55,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 270 transitions. [2021-07-13 19:24:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:55,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:55,930 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:56,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:56,146 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:56,146 INFO L82 PathProgramCache]: Analyzing trace with hash 865094314, now seen corresponding path program 35 times [2021-07-13 19:24:56,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:56,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533036760] [2021-07-13 19:24:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:56,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533036760] [2021-07-13 19:24:56,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533036760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642957221] [2021-07-13 19:24:56,215 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:56,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:24:56,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:56,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:24:56,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:56,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:56,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:24:56,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:56,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:56,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:24:56,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:56,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:56,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:24:57,259 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 234 [2021-07-13 19:24:57,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:24:57,949 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:24:57,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:24:57,950 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:24:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:57,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642957221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:57,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:57,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-13 19:24:57,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848096079] [2021-07-13 19:24:57,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:57,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:57,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:57,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:57,976 INFO L87 Difference]: Start difference. First operand 100 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:58,296 INFO L93 Difference]: Finished difference Result 156 states and 373 transitions. [2021-07-13 19:24:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:24:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:58,297 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:24:58,297 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:24:58,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:24:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:24:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 103. [2021-07-13 19:24:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.7254901960784315) internal successors, (278), 102 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 278 transitions. [2021-07-13 19:24:58,299 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 278 transitions. Word has length 16 [2021-07-13 19:24:58,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:58,299 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 278 transitions. [2021-07-13 19:24:58,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,299 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 278 transitions. [2021-07-13 19:24:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:58,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:58,300 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:58,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-07-13 19:24:58,513 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash -770929815, now seen corresponding path program 36 times [2021-07-13 19:24:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:58,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691934183] [2021-07-13 19:24:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:58,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691934183] [2021-07-13 19:24:58,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691934183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861582314] [2021-07-13 19:24:58,541 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:58,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:24:58,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:24:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:58,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861582314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:58,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:58,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:24:58,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681806501] [2021-07-13 19:24:58,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:24:58,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:24:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:24:58,593 INFO L87 Difference]: Start difference. First operand 103 states and 278 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:58,631 INFO L93 Difference]: Finished difference Result 216 states and 471 transitions. [2021-07-13 19:24:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:24:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:58,632 INFO L225 Difference]: With dead ends: 216 [2021-07-13 19:24:58,632 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:24:58,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:24:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:24:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 109. [2021-07-13 19:24:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.787037037037037) internal successors, (301), 108 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 301 transitions. [2021-07-13 19:24:58,635 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 301 transitions. Word has length 16 [2021-07-13 19:24:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:58,635 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 301 transitions. [2021-07-13 19:24:58,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 301 transitions. [2021-07-13 19:24:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:58,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:58,636 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:58,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-07-13 19:24:58,853 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1085138890, now seen corresponding path program 37 times [2021-07-13 19:24:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:58,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125612134] [2021-07-13 19:24:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:58,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:58,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125612134] [2021-07-13 19:24:58,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125612134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:58,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797304273] [2021-07-13 19:24:59,000 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:59,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:24:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:59,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:59,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:24:59,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:24:59,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:24:59,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:24:59,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:24:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:59,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797304273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:59,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:59,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:24:59,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897310739] [2021-07-13 19:24:59,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:24:59,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:24:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:59,265 INFO L87 Difference]: Start difference. First operand 109 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:59,519 INFO L93 Difference]: Finished difference Result 126 states and 330 transitions. [2021-07-13 19:24:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:59,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:24:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:59,520 INFO L225 Difference]: With dead ends: 126 [2021-07-13 19:24:59,520 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:24:59,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:24:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:24:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2021-07-13 19:24:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-07-13 19:24:59,522 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-07-13 19:24:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:59,522 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-07-13 19:24:59,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-07-13 19:24:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:24:59,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:59,523 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:59,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-07-13 19:24:59,723 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:59,724 INFO L82 PathProgramCache]: Analyzing trace with hash -226264360, now seen corresponding path program 38 times [2021-07-13 19:24:59,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:59,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969521823] [2021-07-13 19:24:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:59,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:59,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969521823] [2021-07-13 19:24:59,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969521823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:59,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524566665] [2021-07-13 19:24:59,863 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:59,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:59,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:59,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:24:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:00,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:00,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:00,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:00,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:00,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:00,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:00,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:00,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:00,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:00,863 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:00,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:00,863 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:00,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524566665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:00,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:00,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:00,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492831422] [2021-07-13 19:25:00,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:00,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:00,891 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:01,157 INFO L93 Difference]: Finished difference Result 150 states and 373 transitions. [2021-07-13 19:25:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:25:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:01,157 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:25:01,157 INFO L226 Difference]: Without dead ends: 140 [2021-07-13 19:25:01,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:25:01,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-07-13 19:25:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2021-07-13 19:25:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-07-13 19:25:01,160 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-07-13 19:25:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:01,160 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-07-13 19:25:01,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-07-13 19:25:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:01,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:01,160 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:01,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-07-13 19:25:01,369 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:01,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1484348948, now seen corresponding path program 39 times [2021-07-13 19:25:01,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:01,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422167158] [2021-07-13 19:25:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:01,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:01,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422167158] [2021-07-13 19:25:01,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422167158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:01,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489384277] [2021-07-13 19:25:01,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:01,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:01,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:01,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:01,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:01,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:01,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:01,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:01,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:01,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:02,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:02,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:02,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:02,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:02,716 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:02,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:02,717 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:02,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489384277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:02,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:02,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:02,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503285737] [2021-07-13 19:25:02,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:02,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:02,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:02,743 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:03,028 INFO L93 Difference]: Finished difference Result 171 states and 410 transitions. [2021-07-13 19:25:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:25:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:03,029 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:25:03,029 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:25:03,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:25:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:25:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 109. [2021-07-13 19:25:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.7685185185185186) internal successors, (299), 108 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 299 transitions. [2021-07-13 19:25:03,031 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 299 transitions. Word has length 16 [2021-07-13 19:25:03,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:03,031 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 299 transitions. [2021-07-13 19:25:03,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:03,031 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 299 transitions. [2021-07-13 19:25:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:03,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:03,031 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:03,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-07-13 19:25:03,250 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:03,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:03,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1321213352, now seen corresponding path program 40 times [2021-07-13 19:25:03,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:03,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79583652] [2021-07-13 19:25:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:03,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:03,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79583652] [2021-07-13 19:25:03,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79583652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:03,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109293681] [2021-07-13 19:25:03,324 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:03,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:03,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:03,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:03,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:03,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:03,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:03,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:03,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:03,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:03,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:04,499 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 279 [2021-07-13 19:25:05,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:05,282 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:05,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:05,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109293681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802229954] [2021-07-13 19:25:05,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:05,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:05,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:05,311 INFO L87 Difference]: Start difference. First operand 109 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:05,736 INFO L93 Difference]: Finished difference Result 188 states and 439 transitions. [2021-07-13 19:25:05,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:25:05,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:05,737 INFO L225 Difference]: With dead ends: 188 [2021-07-13 19:25:05,737 INFO L226 Difference]: Without dead ends: 178 [2021-07-13 19:25:05,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:25:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-13 19:25:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 111. [2021-07-13 19:25:05,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7636363636363637) internal successors, (304), 110 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 304 transitions. [2021-07-13 19:25:05,739 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 304 transitions. Word has length 16 [2021-07-13 19:25:05,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:05,740 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 304 transitions. [2021-07-13 19:25:05,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:05,740 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 304 transitions. [2021-07-13 19:25:05,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:05,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:05,740 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:05,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-07-13 19:25:05,957 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:05,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:05,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2082432313, now seen corresponding path program 41 times [2021-07-13 19:25:05,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:05,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291200269] [2021-07-13 19:25:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:05,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291200269] [2021-07-13 19:25:05,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291200269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061557084] [2021-07-13 19:25:05,985 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:06,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061557084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:06,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:06,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:06,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234197479] [2021-07-13 19:25:06,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:06,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:06,035 INFO L87 Difference]: Start difference. First operand 111 states and 304 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:06,095 INFO L93 Difference]: Finished difference Result 260 states and 558 transitions. [2021-07-13 19:25:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:25:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:06,096 INFO L225 Difference]: With dead ends: 260 [2021-07-13 19:25:06,096 INFO L226 Difference]: Without dead ends: 260 [2021-07-13 19:25:06,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-07-13 19:25:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 121. [2021-07-13 19:25:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.825) internal successors, (339), 120 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 339 transitions. [2021-07-13 19:25:06,099 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 339 transitions. Word has length 16 [2021-07-13 19:25:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:06,099 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 339 transitions. [2021-07-13 19:25:06,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,099 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 339 transitions. [2021-07-13 19:25:06,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:06,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:06,100 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:06,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1983 [2021-07-13 19:25:06,316 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash 931885580, now seen corresponding path program 42 times [2021-07-13 19:25:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:06,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335922262] [2021-07-13 19:25:06,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:06,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:06,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335922262] [2021-07-13 19:25:06,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335922262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:06,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203485085] [2021-07-13 19:25:06,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:06,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:06,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:06,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:06,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:06,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:06,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:06,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:06,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:06,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:06,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:25:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:06,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203485085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:06,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:06,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:06,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714516229] [2021-07-13 19:25:06,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:06,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:06,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:06,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:06,700 INFO L87 Difference]: Start difference. First operand 121 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:06,933 INFO L93 Difference]: Finished difference Result 136 states and 365 transitions. [2021-07-13 19:25:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:25:06,933 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:06,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:06,933 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:25:06,934 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:25:06,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:25:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:25:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2021-07-13 19:25:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-13 19:25:06,936 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-13 19:25:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:06,936 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-13 19:25:06,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-13 19:25:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:06,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:06,936 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:07,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:07,152 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1790760110, now seen corresponding path program 43 times [2021-07-13 19:25:07,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:07,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452260443] [2021-07-13 19:25:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:07,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:07,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452260443] [2021-07-13 19:25:07,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452260443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:07,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623569045] [2021-07-13 19:25:07,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:07,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:07,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:07,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:07,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:07,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:07,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:07,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:07,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:07,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:07,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:08,345 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 227 [2021-07-13 19:25:09,311 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-07-13 19:25:09,434 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 295 [2021-07-13 19:25:09,572 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 299 [2021-07-13 19:25:09,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:09,958 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:09,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:09,959 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:09,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623569045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:09,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:09,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:09,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174275576] [2021-07-13 19:25:09,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:09,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:09,985 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:10,272 INFO L93 Difference]: Finished difference Result 163 states and 416 transitions. [2021-07-13 19:25:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:10,273 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:25:10,273 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:25:10,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:25:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:25:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-07-13 19:25:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-13 19:25:10,275 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-13 19:25:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:10,275 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-13 19:25:10,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-13 19:25:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:10,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:10,276 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:10,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2005 [2021-07-13 19:25:10,489 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash -793593878, now seen corresponding path program 44 times [2021-07-13 19:25:10,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:10,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432437835] [2021-07-13 19:25:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:10,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:10,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432437835] [2021-07-13 19:25:10,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432437835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:10,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200899447] [2021-07-13 19:25:10,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:10,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:10,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:10,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:10,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:10,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:10,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:10,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:10,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:10,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:11,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:11,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:11,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:12,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:12,024 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:12,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:12,025 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:12,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200899447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:12,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:12,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:12,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387386622] [2021-07-13 19:25:12,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:12,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:12,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:12,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:12,050 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:12,410 INFO L93 Difference]: Finished difference Result 192 states and 470 transitions. [2021-07-13 19:25:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:25:12,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:12,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:12,411 INFO L225 Difference]: With dead ends: 192 [2021-07-13 19:25:12,411 INFO L226 Difference]: Without dead ends: 182 [2021-07-13 19:25:12,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:25:12,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-13 19:25:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2021-07-13 19:25:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-13 19:25:12,413 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-13 19:25:12,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:12,413 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-13 19:25:12,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-13 19:25:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:12,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:12,414 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:12,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:12,630 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash 695811118, now seen corresponding path program 45 times [2021-07-13 19:25:12,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:12,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859755369] [2021-07-13 19:25:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:12,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859755369] [2021-07-13 19:25:12,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859755369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703703774] [2021-07-13 19:25:12,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:12,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:12,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:12,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:12,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:12,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:12,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:12,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:13,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:13,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:13,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:13,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:13,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:13,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:13,602 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:13,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:13,603 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:13,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703703774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:13,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:13,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:13,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551173340] [2021-07-13 19:25:13,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:13,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:13,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:13,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:13,631 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:14,088 INFO L93 Difference]: Finished difference Result 205 states and 493 transitions. [2021-07-13 19:25:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:25:14,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:14,089 INFO L225 Difference]: With dead ends: 205 [2021-07-13 19:25:14,089 INFO L226 Difference]: Without dead ends: 195 [2021-07-13 19:25:14,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-07-13 19:25:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 121. [2021-07-13 19:25:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.808333333333333) internal successors, (337), 120 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 337 transitions. [2021-07-13 19:25:14,092 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 337 transitions. Word has length 16 [2021-07-13 19:25:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:14,092 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 337 transitions. [2021-07-13 19:25:14,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 337 transitions. [2021-07-13 19:25:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:14,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:14,092 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:14,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2691 [2021-07-13 19:25:14,297 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash -377274262, now seen corresponding path program 46 times [2021-07-13 19:25:14,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:14,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159556060] [2021-07-13 19:25:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:14,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:14,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159556060] [2021-07-13 19:25:14,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159556060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:14,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491754165] [2021-07-13 19:25:14,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:14,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:14,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:14,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:14,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:14,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:14,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:14,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:14,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:14,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:14,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:14,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:14,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:16,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:16,039 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:16,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:16,040 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:16,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491754165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:16,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:16,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572792122] [2021-07-13 19:25:16,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:16,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:16,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:16,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:16,066 INFO L87 Difference]: Start difference. First operand 121 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:16,458 INFO L93 Difference]: Finished difference Result 165 states and 407 transitions. [2021-07-13 19:25:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:16,459 INFO L225 Difference]: With dead ends: 165 [2021-07-13 19:25:16,459 INFO L226 Difference]: Without dead ends: 155 [2021-07-13 19:25:16,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:25:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-13 19:25:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2021-07-13 19:25:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 122 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 340 transitions. [2021-07-13 19:25:16,461 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 340 transitions. Word has length 16 [2021-07-13 19:25:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:16,462 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 340 transitions. [2021-07-13 19:25:16,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 340 transitions. [2021-07-13 19:25:16,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:16,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:16,462 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:16,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2866,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:16,669 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash 342345065, now seen corresponding path program 47 times [2021-07-13 19:25:16,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:16,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047990878] [2021-07-13 19:25:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:16,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:16,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047990878] [2021-07-13 19:25:16,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047990878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:16,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122715300] [2021-07-13 19:25:16,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:16,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:16,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:16,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:16,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:16,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122715300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:16,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:16,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:16,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951723655] [2021-07-13 19:25:16,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:16,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:16,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:16,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:16,755 INFO L87 Difference]: Start difference. First operand 123 states and 340 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:16,841 INFO L93 Difference]: Finished difference Result 247 states and 556 transitions. [2021-07-13 19:25:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:25:16,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:16,842 INFO L225 Difference]: With dead ends: 247 [2021-07-13 19:25:16,842 INFO L226 Difference]: Without dead ends: 247 [2021-07-13 19:25:16,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:25:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-13 19:25:16,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 134. [2021-07-13 19:25:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-07-13 19:25:16,844 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 16 [2021-07-13 19:25:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:16,845 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-07-13 19:25:16,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-07-13 19:25:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:16,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:16,845 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:17,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3123,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:17,052 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash -964865290, now seen corresponding path program 48 times [2021-07-13 19:25:17,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:17,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2518765] [2021-07-13 19:25:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:17,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:17,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2518765] [2021-07-13 19:25:17,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2518765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:17,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937905993] [2021-07-13 19:25:17,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:17,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:17,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:17,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:17,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:17,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:17,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:17,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:17,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:25:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:17,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937905993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:17,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:17,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:17,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164972272] [2021-07-13 19:25:17,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:17,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:17,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:17,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:17,424 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:17,678 INFO L93 Difference]: Finished difference Result 150 states and 406 transitions. [2021-07-13 19:25:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:25:17,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:17,679 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:25:17,679 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:25:17,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:25:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:25:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2021-07-13 19:25:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-13 19:25:17,682 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-13 19:25:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:17,682 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-13 19:25:17,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-13 19:25:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:17,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:17,682 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:17,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3124,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:17,893 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash -105990760, now seen corresponding path program 49 times [2021-07-13 19:25:17,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:17,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575412276] [2021-07-13 19:25:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:18,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:18,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575412276] [2021-07-13 19:25:18,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575412276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:18,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035217525] [2021-07-13 19:25:18,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:18,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:18,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:18,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:18,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:18,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:18,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:18,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:18,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:18,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:20,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:20,031 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:20,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:20,032 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:20,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035217525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:20,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:20,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:20,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759098159] [2021-07-13 19:25:20,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:20,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:20,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:20,058 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:20,390 INFO L93 Difference]: Finished difference Result 179 states and 464 transitions. [2021-07-13 19:25:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:20,391 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:25:20,391 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 19:25:20,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 19:25:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2021-07-13 19:25:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-13 19:25:20,394 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-13 19:25:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:20,394 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-13 19:25:20,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-13 19:25:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:20,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:20,394 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:20,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3143 [2021-07-13 19:25:20,595 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1604622548, now seen corresponding path program 50 times [2021-07-13 19:25:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:20,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576495634] [2021-07-13 19:25:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:20,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:20,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576495634] [2021-07-13 19:25:20,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576495634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:20,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443220898] [2021-07-13 19:25:20,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:20,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:20,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:20,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:20,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:20,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:20,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:20,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:20,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:21,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:21,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:21,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:21,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:21,847 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:21,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:21,848 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:21,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443220898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:21,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:21,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:21,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378742500] [2021-07-13 19:25:21,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:21,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:21,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:21,875 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:22,241 INFO L93 Difference]: Finished difference Result 203 states and 504 transitions. [2021-07-13 19:25:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:25:22,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:22,242 INFO L225 Difference]: With dead ends: 203 [2021-07-13 19:25:22,242 INFO L226 Difference]: Without dead ends: 193 [2021-07-13 19:25:22,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:25:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-13 19:25:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2021-07-13 19:25:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-13 19:25:22,245 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-13 19:25:22,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:22,245 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-13 19:25:22,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-13 19:25:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:22,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:22,245 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:22,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:22,454 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1200939752, now seen corresponding path program 51 times [2021-07-13 19:25:22,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:22,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427438789] [2021-07-13 19:25:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:22,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427438789] [2021-07-13 19:25:22,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427438789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:22,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913909407] [2021-07-13 19:25:22,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:22,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:22,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:22,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:22,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:22,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:22,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:22,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:22,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:22,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:22,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:23,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:23,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:23,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:23,919 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:23,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:23,920 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:23,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913909407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:23,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:23,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:23,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998053116] [2021-07-13 19:25:23,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:23,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:23,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:23,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:23,944 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:24,453 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-07-13 19:25:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:25:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:24,454 INFO L225 Difference]: With dead ends: 226 [2021-07-13 19:25:24,454 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:25:24,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:25:24,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:25:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2021-07-13 19:25:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-13 19:25:24,457 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-13 19:25:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:24,457 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-13 19:25:24,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-13 19:25:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:24,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:24,457 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:24,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3690 [2021-07-13 19:25:24,669 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2020942164, now seen corresponding path program 52 times [2021-07-13 19:25:24,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:24,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080381329] [2021-07-13 19:25:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:24,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:24,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080381329] [2021-07-13 19:25:24,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080381329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:24,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216184301] [2021-07-13 19:25:24,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:24,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:24,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:24,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:24,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:24,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:24,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:25,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:25,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:25,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:25,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:25,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:25,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:25,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:25,684 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:25,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:25,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216184301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:25,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875306804] [2021-07-13 19:25:25,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:25,712 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:26,093 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-07-13 19:25:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:26,094 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:25:26,094 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 19:25:26,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:25:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 19:25:26,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 134. [2021-07-13 19:25:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.819548872180451) internal successors, (375), 133 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 375 transitions. [2021-07-13 19:25:26,096 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 375 transitions. Word has length 16 [2021-07-13 19:25:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:26,096 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 375 transitions. [2021-07-13 19:25:26,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 375 transitions. [2021-07-13 19:25:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:26,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:26,097 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:26,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-07-13 19:25:26,297 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1179933544, now seen corresponding path program 53 times [2021-07-13 19:25:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:26,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857755443] [2021-07-13 19:25:26,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:26,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857755443] [2021-07-13 19:25:26,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857755443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705797660] [2021-07-13 19:25:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:26,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:26,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:26,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:26,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:26,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:26,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:26,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:26,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:26,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:26,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:27,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:27,487 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:27,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:27,487 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705797660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:27,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:27,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944434716] [2021-07-13 19:25:27,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:27,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:27,514 INFO L87 Difference]: Start difference. First operand 134 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:27,999 INFO L93 Difference]: Finished difference Result 186 states and 464 transitions. [2021-07-13 19:25:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:28,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:28,001 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:25:28,001 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 19:25:28,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 19:25:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 136. [2021-07-13 19:25:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.8) internal successors, (378), 135 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 378 transitions. [2021-07-13 19:25:28,003 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 378 transitions. Word has length 16 [2021-07-13 19:25:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:28,003 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 378 transitions. [2021-07-13 19:25:28,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 378 transitions. [2021-07-13 19:25:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:28,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:28,003 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:28,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-07-13 19:25:28,213 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:28,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2060752071, now seen corresponding path program 54 times [2021-07-13 19:25:28,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:28,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803926845] [2021-07-13 19:25:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:28,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803926845] [2021-07-13 19:25:28,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803926845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445395955] [2021-07-13 19:25:28,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:28,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:25:28,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:28,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:28,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445395955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:28,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:28,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235238276] [2021-07-13 19:25:28,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:28,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:28,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:28,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:28,292 INFO L87 Difference]: Start difference. First operand 136 states and 378 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:28,396 INFO L93 Difference]: Finished difference Result 245 states and 574 transitions. [2021-07-13 19:25:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:25:28,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:28,397 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:25:28,397 INFO L226 Difference]: Without dead ends: 245 [2021-07-13 19:25:28,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-07-13 19:25:28,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 144. [2021-07-13 19:25:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-07-13 19:25:28,410 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-07-13 19:25:28,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:28,410 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-07-13 19:25:28,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:28,410 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-07-13 19:25:28,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:28,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:28,411 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:28,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4302,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:28,625 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 365399884, now seen corresponding path program 55 times [2021-07-13 19:25:28,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:28,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421529719] [2021-07-13 19:25:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:28,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421529719] [2021-07-13 19:25:28,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421529719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12314274] [2021-07-13 19:25:28,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:28,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:28,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:28,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:28,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:28,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:28,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:28,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-13 19:25:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12314274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:28,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:29,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10084491] [2021-07-13 19:25:29,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:29,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:29,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:29,000 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:29,185 INFO L93 Difference]: Finished difference Result 164 states and 445 transitions. [2021-07-13 19:25:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:25:29,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:29,186 INFO L225 Difference]: With dead ends: 164 [2021-07-13 19:25:29,186 INFO L226 Difference]: Without dead ends: 155 [2021-07-13 19:25:29,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-13 19:25:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-07-13 19:25:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-07-13 19:25:29,188 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-07-13 19:25:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:29,188 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-07-13 19:25:29,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-07-13 19:25:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:29,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:29,189 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:29,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:29,405 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1224274414, now seen corresponding path program 56 times [2021-07-13 19:25:29,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:29,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113947608] [2021-07-13 19:25:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:29,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:29,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113947608] [2021-07-13 19:25:29,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113947608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:29,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928358249] [2021-07-13 19:25:29,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:29,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:29,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:29,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:29,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:29,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:29,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:29,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:29,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:30,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:30,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:30,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:31,182 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 313 [2021-07-13 19:25:31,314 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-07-13 19:25:31,448 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 325 [2021-07-13 19:25:31,593 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 329 [2021-07-13 19:25:31,741 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 327 [2021-07-13 19:25:32,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:32,101 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:32,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:32,102 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928358249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:32,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:32,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344103867] [2021-07-13 19:25:32,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:32,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:32,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:32,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:32,127 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:32,430 INFO L93 Difference]: Finished difference Result 199 states and 522 transitions. [2021-07-13 19:25:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:25:32,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:32,431 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:25:32,431 INFO L226 Difference]: Without dead ends: 189 [2021-07-13 19:25:32,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:25:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-13 19:25:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 144. [2021-07-13 19:25:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.8181818181818183) internal successors, (403), 143 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 403 transitions. [2021-07-13 19:25:32,434 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 403 transitions. Word has length 16 [2021-07-13 19:25:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:32,434 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 403 transitions. [2021-07-13 19:25:32,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 403 transitions. [2021-07-13 19:25:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:32,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:32,434 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:32,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4334,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:32,641 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:32,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1360079574, now seen corresponding path program 57 times [2021-07-13 19:25:32,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:32,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288911124] [2021-07-13 19:25:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:32,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288911124] [2021-07-13 19:25:32,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288911124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260528370] [2021-07-13 19:25:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:32,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:32,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:32,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:32,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:32,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:33,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:33,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:33,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:33,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:33,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:33,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:34,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:34,569 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:34,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:34,569 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:34,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260528370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:34,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:34,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:34,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569619678] [2021-07-13 19:25:34,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:34,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:34,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:34,595 INFO L87 Difference]: Start difference. First operand 144 states and 403 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:35,015 INFO L93 Difference]: Finished difference Result 222 states and 560 transitions. [2021-07-13 19:25:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:25:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:35,017 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:25:35,017 INFO L226 Difference]: Without dead ends: 212 [2021-07-13 19:25:35,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:25:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-07-13 19:25:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 145. [2021-07-13 19:25:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.8194444444444446) internal successors, (406), 144 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 406 transitions. [2021-07-13 19:25:35,019 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 406 transitions. Word has length 16 [2021-07-13 19:25:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:35,019 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 406 transitions. [2021-07-13 19:25:35,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 406 transitions. [2021-07-13 19:25:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:35,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:35,020 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:35,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4694 [2021-07-13 19:25:35,225 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1298863593, now seen corresponding path program 58 times [2021-07-13 19:25:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:35,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257813157] [2021-07-13 19:25:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:35,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257813157] [2021-07-13 19:25:35,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257813157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883120668] [2021-07-13 19:25:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:35,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:35,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:35,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883120668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:35,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:25:35,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168744602] [2021-07-13 19:25:35,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:25:35,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:35,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:25:35,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:25:35,307 INFO L87 Difference]: Start difference. First operand 145 states and 406 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-07-13 19:25:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:35,345 INFO L93 Difference]: Finished difference Result 273 states and 654 transitions. [2021-07-13 19:25:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:25:35,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 16 [2021-07-13 19:25:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:35,346 INFO L225 Difference]: With dead ends: 273 [2021-07-13 19:25:35,346 INFO L226 Difference]: Without dead ends: 273 [2021-07-13 19:25:35,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-07-13 19:25:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 175. [2021-07-13 19:25:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8908045977011496) internal successors, (503), 174 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 503 transitions. [2021-07-13 19:25:35,349 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 503 transitions. Word has length 16 [2021-07-13 19:25:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:35,349 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 503 transitions. [2021-07-13 19:25:35,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-07-13 19:25:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 503 transitions. [2021-07-13 19:25:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:35,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:35,350 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:35,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-07-13 19:25:35,550 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:35,550 INFO L82 PathProgramCache]: Analyzing trace with hash 129325422, now seen corresponding path program 59 times [2021-07-13 19:25:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:35,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28979487] [2021-07-13 19:25:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:35,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28979487] [2021-07-13 19:25:35,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28979487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668055414] [2021-07-13 19:25:35,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:35,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:25:35,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:35,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:35,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:35,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:35,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:35,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:35,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:36,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:36,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:36,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:36,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:36,772 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:36,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:36,773 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:36,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668055414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:36,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:36,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:36,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978210895] [2021-07-13 19:25:36,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:36,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:36,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:36,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:36,799 INFO L87 Difference]: Start difference. First operand 175 states and 503 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:37,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:37,294 INFO L93 Difference]: Finished difference Result 273 states and 689 transitions. [2021-07-13 19:25:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:25:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:37,295 INFO L225 Difference]: With dead ends: 273 [2021-07-13 19:25:37,295 INFO L226 Difference]: Without dead ends: 263 [2021-07-13 19:25:37,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:25:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-07-13 19:25:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 176. [2021-07-13 19:25:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.874285714285714) internal successors, (503), 175 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 503 transitions. [2021-07-13 19:25:37,298 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 503 transitions. Word has length 16 [2021-07-13 19:25:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:37,298 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 503 transitions. [2021-07-13 19:25:37,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 503 transitions. [2021-07-13 19:25:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:37,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:37,299 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:37,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5048,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:37,500 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash -761996209, now seen corresponding path program 60 times [2021-07-13 19:25:37,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:37,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230291416] [2021-07-13 19:25:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:37,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230291416] [2021-07-13 19:25:37,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230291416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442036668] [2021-07-13 19:25:37,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:37,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:37,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:37,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442036668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:37,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:37,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585566169] [2021-07-13 19:25:37,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:37,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:37,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:37,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:37,595 INFO L87 Difference]: Start difference. First operand 176 states and 503 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:37,656 INFO L93 Difference]: Finished difference Result 300 states and 694 transitions. [2021-07-13 19:25:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:25:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:25:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:37,657 INFO L225 Difference]: With dead ends: 300 [2021-07-13 19:25:37,657 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 19:25:37,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 19:25:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 174. [2021-07-13 19:25:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-07-13 19:25:37,660 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-07-13 19:25:37,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:37,660 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-07-13 19:25:37,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:37,660 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-07-13 19:25:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:37,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:37,660 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:37,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5248,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:37,862 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash -943759958, now seen corresponding path program 61 times [2021-07-13 19:25:37,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:37,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427714515] [2021-07-13 19:25:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427714515] [2021-07-13 19:25:37,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427714515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354353354] [2021-07-13 19:25:37,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:37,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:38,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:38,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:38,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:38,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:38,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:38,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:38,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:38,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:39,494 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 272 [2021-07-13 19:25:39,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:39,828 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:39,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:39,828 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354353354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:39,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:39,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:39,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850368315] [2021-07-13 19:25:39,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:39,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:39,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:39,854 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:40,306 INFO L93 Difference]: Finished difference Result 242 states and 614 transitions. [2021-07-13 19:25:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:40,307 INFO L225 Difference]: With dead ends: 242 [2021-07-13 19:25:40,307 INFO L226 Difference]: Without dead ends: 232 [2021-07-13 19:25:40,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:25:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-07-13 19:25:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 174. [2021-07-13 19:25:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.867052023121387) internal successors, (496), 173 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 496 transitions. [2021-07-13 19:25:40,310 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 496 transitions. Word has length 16 [2021-07-13 19:25:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:40,310 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 496 transitions. [2021-07-13 19:25:40,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 496 transitions. [2021-07-13 19:25:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:40,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:40,311 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:40,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5249,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:40,523 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:40,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:40,523 INFO L82 PathProgramCache]: Analyzing trace with hash -224140631, now seen corresponding path program 62 times [2021-07-13 19:25:40,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:40,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547280455] [2021-07-13 19:25:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:40,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:40,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547280455] [2021-07-13 19:25:40,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547280455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124157921] [2021-07-13 19:25:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:40,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:40,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:40,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:40,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:40,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124157921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:40,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:40,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972270049] [2021-07-13 19:25:40,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:40,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:40,606 INFO L87 Difference]: Start difference. First operand 174 states and 496 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:40,686 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2021-07-13 19:25:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:25:40,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:25:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:40,688 INFO L225 Difference]: With dead ends: 262 [2021-07-13 19:25:40,688 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:25:40,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:25:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:25:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 167. [2021-07-13 19:25:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-07-13 19:25:40,690 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-07-13 19:25:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:40,690 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-07-13 19:25:40,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-07-13 19:25:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:40,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:40,691 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:40,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5581,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:40,908 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:40,908 INFO L82 PathProgramCache]: Analyzing trace with hash 150331630, now seen corresponding path program 63 times [2021-07-13 19:25:40,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:40,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022805959] [2021-07-13 19:25:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:40,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:40,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022805959] [2021-07-13 19:25:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022805959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007419030] [2021-07-13 19:25:40,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:41,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:25:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:41,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:41,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:41,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:41,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:41,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:41,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:41,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:41,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:42,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:42,959 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:42,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:42,960 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:42,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007419030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:42,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:42,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660715552] [2021-07-13 19:25:42,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:42,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:42,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:42,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:42,985 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:43,510 INFO L93 Difference]: Finished difference Result 233 states and 590 transitions. [2021-07-13 19:25:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:43,512 INFO L225 Difference]: With dead ends: 233 [2021-07-13 19:25:43,512 INFO L226 Difference]: Without dead ends: 223 [2021-07-13 19:25:43,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:25:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-07-13 19:25:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 167. [2021-07-13 19:25:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-07-13 19:25:43,514 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-07-13 19:25:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:43,514 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-07-13 19:25:43,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-07-13 19:25:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:43,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:43,515 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:43,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5582,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:43,727 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:43,728 INFO L82 PathProgramCache]: Analyzing trace with hash -730486897, now seen corresponding path program 64 times [2021-07-13 19:25:43,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:43,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642134543] [2021-07-13 19:25:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:43,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642134543] [2021-07-13 19:25:43,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642134543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396975661] [2021-07-13 19:25:43,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:43,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:43,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:43,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:43,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396975661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:43,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:43,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:43,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603868047] [2021-07-13 19:25:43,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:43,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:43,808 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:43,905 INFO L93 Difference]: Finished difference Result 257 states and 618 transitions. [2021-07-13 19:25:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:25:43,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:25:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:43,906 INFO L225 Difference]: With dead ends: 257 [2021-07-13 19:25:43,906 INFO L226 Difference]: Without dead ends: 257 [2021-07-13 19:25:43,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-13 19:25:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 167. [2021-07-13 19:25:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.855421686746988) internal successors, (474), 166 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 474 transitions. [2021-07-13 19:25:43,908 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 474 transitions. Word has length 16 [2021-07-13 19:25:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:43,909 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 474 transitions. [2021-07-13 19:25:43,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 474 transitions. [2021-07-13 19:25:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:43,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:43,909 INFO L508 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:44,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5917 [2021-07-13 19:25:44,110 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash -292567510, now seen corresponding path program 65 times [2021-07-13 19:25:44,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:44,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812694688] [2021-07-13 19:25:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:44,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:44,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812694688] [2021-07-13 19:25:44,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812694688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:44,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141010648] [2021-07-13 19:25:44,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:44,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:44,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:44,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:25:44,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:44,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:44,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-13 19:25:44,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:44,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:44,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 29 treesize of output 142 [2021-07-13 19:25:44,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:44,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:44,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 31 treesize of output 193 [2021-07-13 19:25:45,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:45,750 INFO L628 ElimStorePlain]: treesize reduction 46, result has 28.1 percent of original size [2021-07-13 19:25:45,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:45,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:18 [2021-07-13 19:25:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:45,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141010648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:45,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:45,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:25:45,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499260349] [2021-07-13 19:25:45,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:45,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:45,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:45,777 INFO L87 Difference]: Start difference. First operand 167 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:46,353 INFO L93 Difference]: Finished difference Result 220 states and 566 transitions. [2021-07-13 19:25:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:25:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:46,354 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:25:46,354 INFO L226 Difference]: Without dead ends: 210 [2021-07-13 19:25:46,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:25:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-13 19:25:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-07-13 19:25:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8392857142857144) internal successors, (477), 168 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 477 transitions. [2021-07-13 19:25:46,357 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 477 transitions. Word has length 16 [2021-07-13 19:25:46,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:46,357 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 477 transitions. [2021-07-13 19:25:46,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 477 transitions. [2021-07-13 19:25:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:25:46,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:46,358 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:46,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5918 [2021-07-13 19:25:46,565 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 752648041, now seen corresponding path program 66 times [2021-07-13 19:25:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:46,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942613848] [2021-07-13 19:25:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:46,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:46,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942613848] [2021-07-13 19:25:46,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942613848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:46,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102243473] [2021-07-13 19:25:46,597 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:46,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:46,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:25:46,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:46,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102243473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:46,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:46,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:46,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484056429] [2021-07-13 19:25:46,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:46,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:46,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:46,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:46,648 INFO L87 Difference]: Start difference. First operand 169 states and 477 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:46,755 INFO L93 Difference]: Finished difference Result 283 states and 699 transitions. [2021-07-13 19:25:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:25:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 16 [2021-07-13 19:25:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:46,756 INFO L225 Difference]: With dead ends: 283 [2021-07-13 19:25:46,756 INFO L226 Difference]: Without dead ends: 283 [2021-07-13 19:25:46,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-13 19:25:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2021-07-13 19:25:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.8457142857142856) internal successors, (498), 175 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 498 transitions. [2021-07-13 19:25:46,759 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 498 transitions. Word has length 16 [2021-07-13 19:25:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:46,759 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 498 transitions. [2021-07-13 19:25:46,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 498 transitions. [2021-07-13 19:25:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:46,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:46,759 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:46,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6233,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:46,973 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -883413798, now seen corresponding path program 67 times [2021-07-13 19:25:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:46,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529705653] [2021-07-13 19:25:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:47,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:47,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529705653] [2021-07-13 19:25:47,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529705653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:47,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860474279] [2021-07-13 19:25:47,061 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:47,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:47,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:47,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:47,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:47,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:47,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:47,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:47,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:25:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:47,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860474279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:47,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:47,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939467913] [2021-07-13 19:25:47,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:47,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:47,541 INFO L87 Difference]: Start difference. First operand 176 states and 498 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:47,780 INFO L93 Difference]: Finished difference Result 212 states and 582 transitions. [2021-07-13 19:25:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:47,781 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:47,782 INFO L225 Difference]: With dead ends: 212 [2021-07-13 19:25:47,782 INFO L226 Difference]: Without dead ends: 198 [2021-07-13 19:25:47,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:25:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-13 19:25:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-07-13 19:25:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8702702702702703) internal successors, (531), 185 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 531 transitions. [2021-07-13 19:25:47,784 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 531 transitions. Word has length 17 [2021-07-13 19:25:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:47,785 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 531 transitions. [2021-07-13 19:25:47,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 531 transitions. [2021-07-13 19:25:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:47,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:47,785 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:48,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6234 [2021-07-13 19:25:48,001 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:48,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1745149700, now seen corresponding path program 68 times [2021-07-13 19:25:48,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:48,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141285244] [2021-07-13 19:25:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:48,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:48,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141285244] [2021-07-13 19:25:48,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141285244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:48,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650956960] [2021-07-13 19:25:48,100 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:48,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:48,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:48,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:48,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:48,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:48,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:48,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:48,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:48,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:48,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:25:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:48,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650956960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:48,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:48,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:48,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854868400] [2021-07-13 19:25:48,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:48,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:48,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:48,436 INFO L87 Difference]: Start difference. First operand 186 states and 531 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:48,707 INFO L93 Difference]: Finished difference Result 207 states and 575 transitions. [2021-07-13 19:25:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:25:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:48,708 INFO L225 Difference]: With dead ends: 207 [2021-07-13 19:25:48,708 INFO L226 Difference]: Without dead ends: 198 [2021-07-13 19:25:48,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:25:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-07-13 19:25:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 187. [2021-07-13 19:25:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-07-13 19:25:48,711 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-07-13 19:25:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:48,711 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-07-13 19:25:48,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-07-13 19:25:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:48,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:48,712 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:48,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6318,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:48,926 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1690943066, now seen corresponding path program 69 times [2021-07-13 19:25:48,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:48,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965726404] [2021-07-13 19:25:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:49,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:49,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965726404] [2021-07-13 19:25:49,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965726404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:49,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030254712] [2021-07-13 19:25:49,032 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:49,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:49,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:49,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:49,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:49,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:49,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-13 19:25:50,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:50,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:50,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:50,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:50,723 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:25:50,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:50,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-13 19:25:50,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:50,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030254712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:50,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:50,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:50,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784709373] [2021-07-13 19:25:50,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:50,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:50,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:50,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:50,751 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:51,055 INFO L93 Difference]: Finished difference Result 235 states and 628 transitions. [2021-07-13 19:25:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:25:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:51,057 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:25:51,057 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:25:51,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:25:51,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:25:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2021-07-13 19:25:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8594594594594596) internal successors, (529), 185 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 529 transitions. [2021-07-13 19:25:51,059 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 529 transitions. Word has length 17 [2021-07-13 19:25:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:51,059 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 529 transitions. [2021-07-13 19:25:51,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 529 transitions. [2021-07-13 19:25:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:51,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:51,060 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:51,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6354 [2021-07-13 19:25:51,273 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2038563784, now seen corresponding path program 70 times [2021-07-13 19:25:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:51,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218495489] [2021-07-13 19:25:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:51,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:51,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218495489] [2021-07-13 19:25:51,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218495489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:51,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687736937] [2021-07-13 19:25:51,401 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:51,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:51,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:51,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:51,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:51,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-13 19:25:52,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:52,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:52,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:52,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:52,342 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:25:52,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:52,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-13 19:25:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:52,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687736937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:52,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:52,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:52,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636769920] [2021-07-13 19:25:52,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:52,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:52,369 INFO L87 Difference]: Start difference. First operand 186 states and 529 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:52,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:52,800 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2021-07-13 19:25:52,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:25:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:52,801 INFO L225 Difference]: With dead ends: 263 [2021-07-13 19:25:52,801 INFO L226 Difference]: Without dead ends: 253 [2021-07-13 19:25:52,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:25:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-13 19:25:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2021-07-13 19:25:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.860215053763441) internal successors, (532), 186 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 532 transitions. [2021-07-13 19:25:52,804 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 532 transitions. Word has length 17 [2021-07-13 19:25:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:52,804 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 532 transitions. [2021-07-13 19:25:52,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 532 transitions. [2021-07-13 19:25:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:52,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:52,804 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:53,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6658,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:53,021 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:53,021 INFO L82 PathProgramCache]: Analyzing trace with hash 620379383, now seen corresponding path program 71 times [2021-07-13 19:25:53,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:53,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381209601] [2021-07-13 19:25:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:53,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:53,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381209601] [2021-07-13 19:25:53,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381209601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492598248] [2021-07-13 19:25:53,051 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:53,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:53,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:53,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:53,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492598248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:53,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:25:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186734791] [2021-07-13 19:25:53,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:53,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:53,108 INFO L87 Difference]: Start difference. First operand 187 states and 532 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:53,154 INFO L93 Difference]: Finished difference Result 357 states and 825 transitions. [2021-07-13 19:25:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:25:53,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-13 19:25:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:53,156 INFO L225 Difference]: With dead ends: 357 [2021-07-13 19:25:53,156 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:25:53,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:25:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-07-13 19:25:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-07-13 19:25:53,159 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-07-13 19:25:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:53,159 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-07-13 19:25:53,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-07-13 19:25:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:53,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:53,160 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:53,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6824 [2021-07-13 19:25:53,377 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash -821225785, now seen corresponding path program 72 times [2021-07-13 19:25:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:53,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728240820] [2021-07-13 19:25:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:53,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:53,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728240820] [2021-07-13 19:25:53,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728240820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227413246] [2021-07-13 19:25:53,409 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:53,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:53,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:53,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:53,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:53,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227413246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:53,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:25:53,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521438455] [2021-07-13 19:25:53,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:53,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:53,459 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:53,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:53,514 INFO L93 Difference]: Finished difference Result 374 states and 857 transitions. [2021-07-13 19:25:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:25:53,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-13 19:25:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:53,515 INFO L225 Difference]: With dead ends: 374 [2021-07-13 19:25:53,515 INFO L226 Difference]: Without dead ends: 374 [2021-07-13 19:25:53,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-07-13 19:25:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 189. [2021-07-13 19:25:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.867021276595745) internal successors, (539), 188 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 539 transitions. [2021-07-13 19:25:53,518 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 539 transitions. Word has length 17 [2021-07-13 19:25:53,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:53,518 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 539 transitions. [2021-07-13 19:25:53,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 539 transitions. [2021-07-13 19:25:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:53,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:53,519 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:53,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6825,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:53,719 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1971772518, now seen corresponding path program 73 times [2021-07-13 19:25:53,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:53,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253345008] [2021-07-13 19:25:53,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:53,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:53,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253345008] [2021-07-13 19:25:53,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253345008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134450797] [2021-07-13 19:25:53,874 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:53,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:54,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:54,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:54,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:54,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:54,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:54,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:25:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134450797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:54,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:54,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:54,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638429687] [2021-07-13 19:25:54,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:54,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:54,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:54,194 INFO L87 Difference]: Start difference. First operand 189 states and 539 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:54,456 INFO L93 Difference]: Finished difference Result 202 states and 560 transitions. [2021-07-13 19:25:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:25:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:54,457 INFO L225 Difference]: With dead ends: 202 [2021-07-13 19:25:54,457 INFO L226 Difference]: Without dead ends: 193 [2021-07-13 19:25:54,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 366.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:25:54,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-07-13 19:25:54,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-07-13 19:25:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-07-13 19:25:54,465 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-07-13 19:25:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:54,465 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-07-13 19:25:54,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-07-13 19:25:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:54,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:54,466 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:54,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6826 [2021-07-13 19:25:54,669 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1112897988, now seen corresponding path program 74 times [2021-07-13 19:25:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:54,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154575280] [2021-07-13 19:25:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:54,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:54,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154575280] [2021-07-13 19:25:54,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154575280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:54,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014054470] [2021-07-13 19:25:54,809 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:54,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:54,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:54,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:54,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:55,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:55,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-13 19:25:55,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:25:55,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:55,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:55,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:55,751 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:25:55,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:55,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-13 19:25:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:55,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014054470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:55,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:55,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:55,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374460774] [2021-07-13 19:25:55,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:55,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:55,778 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:56,016 INFO L93 Difference]: Finished difference Result 227 states and 606 transitions. [2021-07-13 19:25:56,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:56,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:56,017 INFO L225 Difference]: With dead ends: 227 [2021-07-13 19:25:56,017 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:25:56,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:25:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:25:56,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-07-13 19:25:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.856382978723404) internal successors, (537), 188 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 537 transitions. [2021-07-13 19:25:56,020 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 537 transitions. Word has length 17 [2021-07-13 19:25:56,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:56,020 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 537 transitions. [2021-07-13 19:25:56,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,020 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 537 transitions. [2021-07-13 19:25:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:56,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:56,020 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:56,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6868 [2021-07-13 19:25:56,221 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1195798685, now seen corresponding path program 75 times [2021-07-13 19:25:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:56,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794192644] [2021-07-13 19:25:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:56,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:56,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794192644] [2021-07-13 19:25:56,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794192644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987888617] [2021-07-13 19:25:56,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:56,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:56,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:56,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987888617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:56,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:25:56,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061448884] [2021-07-13 19:25:56,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:56,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:56,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:56,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:56,307 INFO L87 Difference]: Start difference. First operand 189 states and 537 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:56,360 INFO L93 Difference]: Finished difference Result 377 states and 865 transitions. [2021-07-13 19:25:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:25:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-13 19:25:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:56,361 INFO L225 Difference]: With dead ends: 377 [2021-07-13 19:25:56,361 INFO L226 Difference]: Without dead ends: 377 [2021-07-13 19:25:56,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-07-13 19:25:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 197. [2021-07-13 19:25:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-07-13 19:25:56,365 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-07-13 19:25:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:56,365 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-07-13 19:25:56,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:25:56,365 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-07-13 19:25:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:56,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:56,365 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:56,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7043,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,566 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:56,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1733654263, now seen corresponding path program 76 times [2021-07-13 19:25:56,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:56,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263030724] [2021-07-13 19:25:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:56,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:56,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263030724] [2021-07-13 19:25:56,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263030724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284290448] [2021-07-13 19:25:56,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:56,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:56,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284290448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:56,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:25:56,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833200483] [2021-07-13 19:25:56,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:56,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:56,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:56,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:56,654 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:25:56,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:56,744 INFO L93 Difference]: Finished difference Result 413 states and 931 transitions. [2021-07-13 19:25:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:25:56,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-13 19:25:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:56,746 INFO L225 Difference]: With dead ends: 413 [2021-07-13 19:25:56,746 INFO L226 Difference]: Without dead ends: 413 [2021-07-13 19:25:56,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-13 19:25:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2021-07-13 19:25:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.872448979591837) internal successors, (563), 196 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 563 transitions. [2021-07-13 19:25:56,749 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 563 transitions. Word has length 17 [2021-07-13 19:25:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:56,749 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 563 transitions. [2021-07-13 19:25:56,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:25:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 563 transitions. [2021-07-13 19:25:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:56,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:56,750 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:56,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7044,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,954 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash 426443908, now seen corresponding path program 77 times [2021-07-13 19:25:56,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:56,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033692811] [2021-07-13 19:25:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:57,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033692811] [2021-07-13 19:25:57,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033692811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664560486] [2021-07-13 19:25:57,107 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:57,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:57,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:57,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:57,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:57,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:57,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:57,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:57,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:25:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:57,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664560486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:57,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:57,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:57,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123047149] [2021-07-13 19:25:57,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:57,438 INFO L87 Difference]: Start difference. First operand 197 states and 563 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:57,696 INFO L93 Difference]: Finished difference Result 211 states and 586 transitions. [2021-07-13 19:25:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:25:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:57,697 INFO L225 Difference]: With dead ends: 211 [2021-07-13 19:25:57,697 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 19:25:57,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:25:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 19:25:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2021-07-13 19:25:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-07-13 19:25:57,700 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-07-13 19:25:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:57,700 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-07-13 19:25:57,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-07-13 19:25:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:57,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:57,701 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7045 [2021-07-13 19:25:57,906 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1285318438, now seen corresponding path program 78 times [2021-07-13 19:25:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:57,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963311369] [2021-07-13 19:25:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:58,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:58,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963311369] [2021-07-13 19:25:58,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963311369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:58,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332034035] [2021-07-13 19:25:58,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:58,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:58,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:25:58,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:58,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:58,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-13 19:25:58,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-13 19:25:58,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:58,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:25:59,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:59,040 INFO L628 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2021-07-13 19:25:59,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:25:59,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-13 19:25:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:59,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332034035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:59,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:59,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:25:59,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51721616] [2021-07-13 19:25:59,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:25:59,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:59,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:25:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:59,067 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:59,408 INFO L93 Difference]: Finished difference Result 244 states and 655 transitions. [2021-07-13 19:25:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:25:59,408 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:59,409 INFO L225 Difference]: With dead ends: 244 [2021-07-13 19:25:59,409 INFO L226 Difference]: Without dead ends: 234 [2021-07-13 19:25:59,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:25:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-07-13 19:25:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 197. [2021-07-13 19:25:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.86734693877551) internal successors, (562), 196 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 562 transitions. [2021-07-13 19:25:59,412 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 562 transitions. Word has length 17 [2021-07-13 19:25:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:59,412 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 562 transitions. [2021-07-13 19:25:59,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 562 transitions. [2021-07-13 19:25:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:59,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:59,413 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:59,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7086 [2021-07-13 19:25:59,613 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash -163096607, now seen corresponding path program 79 times [2021-07-13 19:25:59,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:59,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532046005] [2021-07-13 19:25:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:59,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532046005] [2021-07-13 19:25:59,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532046005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703059089] [2021-07-13 19:25:59,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703059089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:59,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:59,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:25:59,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923070248] [2021-07-13 19:25:59,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:59,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:59,698 INFO L87 Difference]: Start difference. First operand 197 states and 562 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:25:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:59,785 INFO L93 Difference]: Finished difference Result 427 states and 977 transitions. [2021-07-13 19:25:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:25:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-13 19:25:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:59,787 INFO L225 Difference]: With dead ends: 427 [2021-07-13 19:25:59,787 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 19:25:59,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 19:25:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 207. [2021-07-13 19:25:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.907766990291262) internal successors, (599), 206 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 599 transitions. [2021-07-13 19:25:59,790 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 599 transitions. Word has length 17 [2021-07-13 19:25:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:59,790 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 599 transitions. [2021-07-13 19:25:59,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:25:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 599 transitions. [2021-07-13 19:25:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:59,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:59,791 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:59,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7259,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:59,997 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash -669442873, now seen corresponding path program 80 times [2021-07-13 19:25:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:59,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065709383] [2021-07-13 19:25:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065709383] [2021-07-13 19:26:00,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065709383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995727123] [2021-07-13 19:26:00,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:00,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:00,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995727123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:00,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:00,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:00,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104173990] [2021-07-13 19:26:00,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:00,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:00,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:00,087 INFO L87 Difference]: Start difference. First operand 207 states and 599 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:00,203 INFO L93 Difference]: Finished difference Result 378 states and 905 transitions. [2021-07-13 19:26:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-13 19:26:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:00,205 INFO L225 Difference]: With dead ends: 378 [2021-07-13 19:26:00,205 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 19:26:00,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 19:26:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 204. [2021-07-13 19:26:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-07-13 19:26:00,208 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-07-13 19:26:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:00,208 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-07-13 19:26:00,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-07-13 19:26:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:00,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:00,209 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:00,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7260 [2021-07-13 19:26:00,409 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1756709082, now seen corresponding path program 81 times [2021-07-13 19:26:00,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:00,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008545541] [2021-07-13 19:26:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:00,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008545541] [2021-07-13 19:26:00,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008545541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303141828] [2021-07-13 19:26:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:00,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:26:00,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:00,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:26:00,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:00,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:00,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:26:00,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:00,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:00,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:00,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:26:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303141828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:00,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:00,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:00,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751849673] [2021-07-13 19:26:00,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:00,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:00,985 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,206 INFO L93 Difference]: Finished difference Result 222 states and 624 transitions. [2021-07-13 19:26:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,207 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:26:01,207 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:26:01,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:26:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:26:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2021-07-13 19:26:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.9019607843137254) internal successors, (592), 204 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 592 transitions. [2021-07-13 19:26:01,210 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 592 transitions. Word has length 17 [2021-07-13 19:26:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,210 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 592 transitions. [2021-07-13 19:26:01,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 592 transitions. [2021-07-13 19:26:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:01,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,211 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7261,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:01,411 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1679383684, now seen corresponding path program 82 times [2021-07-13 19:26:01,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129133351] [2021-07-13 19:26:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129133351] [2021-07-13 19:26:01,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129133351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:01,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345401598] [2021-07-13 19:26:01,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:01,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:01,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:01,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:26:01,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:01,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:01,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-13 19:26:02,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:26:02,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:02,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:26:02,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:02,370 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:26:02,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:26:02,371 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-13 19:26:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345401598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:02,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891175255] [2021-07-13 19:26:02,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:02,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:02,398 INFO L87 Difference]: Start difference. First operand 205 states and 592 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:02,730 INFO L93 Difference]: Finished difference Result 256 states and 697 transitions. [2021-07-13 19:26:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:26:02,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:02,731 INFO L225 Difference]: With dead ends: 256 [2021-07-13 19:26:02,731 INFO L226 Difference]: Without dead ends: 246 [2021-07-13 19:26:02,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 339.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:26:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-07-13 19:26:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 204. [2021-07-13 19:26:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.9014778325123154) internal successors, (589), 203 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 589 transitions. [2021-07-13 19:26:02,734 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 589 transitions. Word has length 17 [2021-07-13 19:26:02,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:02,734 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 589 transitions. [2021-07-13 19:26:02,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 589 transitions. [2021-07-13 19:26:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:02,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:02,735 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:02,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7335 [2021-07-13 19:26:02,945 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1604794505, now seen corresponding path program 83 times [2021-07-13 19:26:02,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:02,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714632955] [2021-07-13 19:26:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:02,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:02,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714632955] [2021-07-13 19:26:02,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714632955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809881923] [2021-07-13 19:26:02,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:02,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:02,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:02,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:02,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:03,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809881923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:03,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:26:03,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995367682] [2021-07-13 19:26:03,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:03,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:03,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:03,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:03,021 INFO L87 Difference]: Start difference. First operand 204 states and 589 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,053 INFO L93 Difference]: Finished difference Result 345 states and 847 transitions. [2021-07-13 19:26:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:03,055 INFO L225 Difference]: With dead ends: 345 [2021-07-13 19:26:03,055 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:26:03,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:26:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 227. [2021-07-13 19:26:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.938053097345133) internal successors, (664), 226 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) [2021-07-13 19:26:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 664 transitions. [2021-07-13 19:26:03,058 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 664 transitions. Word has length 17 [2021-07-13 19:26:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:03,058 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 664 transitions. [2021-07-13 19:26:03,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 664 transitions. [2021-07-13 19:26:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:03,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:03,059 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:03,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7492 [2021-07-13 19:26:03,273 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 629312989, now seen corresponding path program 84 times [2021-07-13 19:26:03,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:03,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4359459] [2021-07-13 19:26:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:03,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4359459] [2021-07-13 19:26:03,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4359459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106705493] [2021-07-13 19:26:03,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:03,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:26:03,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:03,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106705493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:03,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:03,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927549355] [2021-07-13 19:26:03,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:03,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:03,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:03,359 INFO L87 Difference]: Start difference. First operand 227 states and 664 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,413 INFO L93 Difference]: Finished difference Result 369 states and 882 transitions. [2021-07-13 19:26:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:26:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 17 [2021-07-13 19:26:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:03,415 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:26:03,415 INFO L226 Difference]: Without dead ends: 369 [2021-07-13 19:26:03,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-07-13 19:26:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 215. [2021-07-13 19:26:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.911214953271028) internal successors, (623), 214 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 623 transitions. [2021-07-13 19:26:03,418 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 623 transitions. Word has length 17 [2021-07-13 19:26:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:03,418 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 623 transitions. [2021-07-13 19:26:03,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 623 transitions. [2021-07-13 19:26:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:03,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:03,419 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:03,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7493 [2021-07-13 19:26:03,620 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:03,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:03,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1167168567, now seen corresponding path program 85 times [2021-07-13 19:26:03,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:03,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789118181] [2021-07-13 19:26:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:03,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789118181] [2021-07-13 19:26:03,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789118181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767033302] [2021-07-13 19:26:03,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:03,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767033302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:03,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:03,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637346082] [2021-07-13 19:26:03,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:03,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:03,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:03,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:03,705 INFO L87 Difference]: Start difference. First operand 215 states and 623 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,799 INFO L93 Difference]: Finished difference Result 388 states and 893 transitions. [2021-07-13 19:26:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-13 19:26:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:03,800 INFO L225 Difference]: With dead ends: 388 [2021-07-13 19:26:03,800 INFO L226 Difference]: Without dead ends: 388 [2021-07-13 19:26:03,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-07-13 19:26:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 204. [2021-07-13 19:26:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.896551724137931) internal successors, (588), 203 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 588 transitions. [2021-07-13 19:26:03,804 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 588 transitions. Word has length 17 [2021-07-13 19:26:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:03,804 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 588 transitions. [2021-07-13 19:26:03,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 588 transitions. [2021-07-13 19:26:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:03,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:03,806 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:04,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7494,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:04,017 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash 660822301, now seen corresponding path program 86 times [2021-07-13 19:26:04,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:04,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959506589] [2021-07-13 19:26:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:04,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959506589] [2021-07-13 19:26:04,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959506589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53341009] [2021-07-13 19:26:04,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:04,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:04,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53341009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:04,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:04,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133437893] [2021-07-13 19:26:04,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:04,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:04,113 INFO L87 Difference]: Start difference. First operand 204 states and 588 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:04,239 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2021-07-13 19:26:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:04,239 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-13 19:26:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:04,240 INFO L225 Difference]: With dead ends: 319 [2021-07-13 19:26:04,240 INFO L226 Difference]: Without dead ends: 319 [2021-07-13 19:26:04,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-07-13 19:26:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 198. [2021-07-13 19:26:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.8934010152284264) internal successors, (570), 197 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 570 transitions. [2021-07-13 19:26:04,243 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 570 transitions. Word has length 17 [2021-07-13 19:26:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:04,243 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 570 transitions. [2021-07-13 19:26:04,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 570 transitions. [2021-07-13 19:26:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:04,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:04,244 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:04,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7495 [2021-07-13 19:26:04,444 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:04,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2143957239, now seen corresponding path program 87 times [2021-07-13 19:26:04,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:04,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196372137] [2021-07-13 19:26:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:04,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196372137] [2021-07-13 19:26:04,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196372137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632640843] [2021-07-13 19:26:04,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:04,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:26:04,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632640843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:04,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:04,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158510707] [2021-07-13 19:26:04,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:04,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:04,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:04,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:04,539 INFO L87 Difference]: Start difference. First operand 198 states and 570 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:04,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:04,673 INFO L93 Difference]: Finished difference Result 345 states and 840 transitions. [2021-07-13 19:26:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 17 [2021-07-13 19:26:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:04,674 INFO L225 Difference]: With dead ends: 345 [2021-07-13 19:26:04,674 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:26:04,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:26:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:26:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 202. [2021-07-13 19:26:04,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8955223880597014) internal successors, (582), 201 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:04,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 582 transitions. [2021-07-13 19:26:04,677 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 582 transitions. Word has length 17 [2021-07-13 19:26:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:04,677 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 582 transitions. [2021-07-13 19:26:04,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-07-13 19:26:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 582 transitions. [2021-07-13 19:26:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:04,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:04,677 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:04,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7496,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:04,878 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 45256516, now seen corresponding path program 88 times [2021-07-13 19:26:04,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:04,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156676420] [2021-07-13 19:26:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:05,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:05,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156676420] [2021-07-13 19:26:05,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156676420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:05,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346632635] [2021-07-13 19:26:05,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:05,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:05,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:05,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:26:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:05,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:05,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:26:05,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:05,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:05,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:05,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-13 19:26:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:05,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346632635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:05,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:05,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:05,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353733731] [2021-07-13 19:26:05,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:05,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:05,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:05,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:05,395 INFO L87 Difference]: Start difference. First operand 202 states and 582 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:05,657 INFO L93 Difference]: Finished difference Result 234 states and 664 transitions. [2021-07-13 19:26:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:05,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:05,658 INFO L225 Difference]: With dead ends: 234 [2021-07-13 19:26:05,658 INFO L226 Difference]: Without dead ends: 225 [2021-07-13 19:26:05,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:26:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-07-13 19:26:05,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2021-07-13 19:26:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.928909952606635) internal successors, (618), 211 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 618 transitions. [2021-07-13 19:26:05,661 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 618 transitions. Word has length 17 [2021-07-13 19:26:05,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:05,661 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 618 transitions. [2021-07-13 19:26:05,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,661 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 618 transitions. [2021-07-13 19:26:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:05,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:05,662 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:05,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7497 [2021-07-13 19:26:05,875 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:05,875 INFO L82 PathProgramCache]: Analyzing trace with hash 904131046, now seen corresponding path program 89 times [2021-07-13 19:26:05,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:05,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594709615] [2021-07-13 19:26:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:06,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:06,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594709615] [2021-07-13 19:26:06,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594709615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:06,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475009836] [2021-07-13 19:26:06,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:06,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:06,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:06,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:26:06,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:06,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:06,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-13 19:26:06,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:26:06,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:06,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:26:07,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:07,083 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:26:07,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:26:07,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-13 19:26:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:07,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475009836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:07,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:07,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:07,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735215780] [2021-07-13 19:26:07,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:07,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:07,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:07,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:07,111 INFO L87 Difference]: Start difference. First operand 212 states and 618 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:07,490 INFO L93 Difference]: Finished difference Result 272 states and 753 transitions. [2021-07-13 19:26:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:26:07,490 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:07,491 INFO L225 Difference]: With dead ends: 272 [2021-07-13 19:26:07,491 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:26:07,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 372.9ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:26:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 212. [2021-07-13 19:26:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.933649289099526) internal successors, (619), 211 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 619 transitions. [2021-07-13 19:26:07,494 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 619 transitions. Word has length 17 [2021-07-13 19:26:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:07,494 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 619 transitions. [2021-07-13 19:26:07,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 619 transitions. [2021-07-13 19:26:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:07,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:07,494 INFO L508 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:07,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7561,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:07,695 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:07,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1680222942, now seen corresponding path program 90 times [2021-07-13 19:26:07,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:07,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828830828] [2021-07-13 19:26:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:07,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828830828] [2021-07-13 19:26:07,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828830828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552236114] [2021-07-13 19:26:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:07,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:26:07,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:07,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 19:26:07,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:08,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:08,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 33 treesize of output 193 [2021-07-13 19:26:08,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 19:26:08,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-13 19:26:08,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:08,854 INFO L628 ElimStorePlain]: treesize reduction 18, result has 50.0 percent of original size [2021-07-13 19:26:08,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:26:08,855 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:18 [2021-07-13 19:26:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:08,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552236114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:08,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:08,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:08,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531368690] [2021-07-13 19:26:08,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:08,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:08,882 INFO L87 Difference]: Start difference. First operand 212 states and 619 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:09,618 INFO L93 Difference]: Finished difference Result 304 states and 812 transitions. [2021-07-13 19:26:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:26:09,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:09,619 INFO L225 Difference]: With dead ends: 304 [2021-07-13 19:26:09,619 INFO L226 Difference]: Without dead ends: 294 [2021-07-13 19:26:09,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 598.3ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:26:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-07-13 19:26:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 213. [2021-07-13 19:26:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.938679245283019) internal successors, (623), 212 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 623 transitions. [2021-07-13 19:26:09,622 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 623 transitions. Word has length 17 [2021-07-13 19:26:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:09,622 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 623 transitions. [2021-07-13 19:26:09,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 623 transitions. [2021-07-13 19:26:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:09,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:09,623 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:09,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7744,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:09,823 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:09,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:09,823 INFO L82 PathProgramCache]: Analyzing trace with hash 978720225, now seen corresponding path program 91 times [2021-07-13 19:26:09,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:09,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857150861] [2021-07-13 19:26:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:09,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857150861] [2021-07-13 19:26:09,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857150861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958858171] [2021-07-13 19:26:09,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958858171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:09,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:09,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592061614] [2021-07-13 19:26:09,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:09,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:09,912 INFO L87 Difference]: Start difference. First operand 213 states and 623 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:09,959 INFO L93 Difference]: Finished difference Result 364 states and 870 transitions. [2021-07-13 19:26:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:26:09,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:09,960 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:26:09,960 INFO L226 Difference]: Without dead ends: 364 [2021-07-13 19:26:09,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-07-13 19:26:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 220. [2021-07-13 19:26:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.954337899543379) internal successors, (647), 219 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 647 transitions. [2021-07-13 19:26:09,964 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 647 transitions. Word has length 17 [2021-07-13 19:26:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:09,964 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 647 transitions. [2021-07-13 19:26:09,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 647 transitions. [2021-07-13 19:26:09,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:09,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:09,965 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:10,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7944,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:10,165 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:10,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:10,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1082139577, now seen corresponding path program 92 times [2021-07-13 19:26:10,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:10,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008951850] [2021-07-13 19:26:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:10,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:10,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008951850] [2021-07-13 19:26:10,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008951850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046544542] [2021-07-13 19:26:10,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:10,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:10,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:10,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046544542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:10,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:10,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221802688] [2021-07-13 19:26:10,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:10,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:10,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:10,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:10,253 INFO L87 Difference]: Start difference. First operand 220 states and 647 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:10,309 INFO L93 Difference]: Finished difference Result 346 states and 892 transitions. [2021-07-13 19:26:10,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:10,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:10,310 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:26:10,310 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 19:26:10,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 19:26:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 250. [2021-07-13 19:26:10,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9759036144578315) internal successors, (741), 249 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 741 transitions. [2021-07-13 19:26:10,313 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 741 transitions. Word has length 17 [2021-07-13 19:26:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:10,313 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 741 transitions. [2021-07-13 19:26:10,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 741 transitions. [2021-07-13 19:26:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:10,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:10,313 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:10,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7945,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:10,514 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash -544283999, now seen corresponding path program 93 times [2021-07-13 19:26:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:10,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475128205] [2021-07-13 19:26:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:10,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475128205] [2021-07-13 19:26:10,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475128205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000878565] [2021-07-13 19:26:10,549 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 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 [2021-07-13 19:26:10,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:10,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:10,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:10,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:10,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000878565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:10,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079787496] [2021-07-13 19:26:10,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:10,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:10,605 INFO L87 Difference]: Start difference. First operand 250 states and 741 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:10,682 INFO L93 Difference]: Finished difference Result 372 states and 930 transitions. [2021-07-13 19:26:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:10,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:10,683 INFO L225 Difference]: With dead ends: 372 [2021-07-13 19:26:10,683 INFO L226 Difference]: Without dead ends: 372 [2021-07-13 19:26:10,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-13 19:26:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 247. [2021-07-13 19:26:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9715447154471546) internal successors, (731), 246 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 731 transitions. [2021-07-13 19:26:10,687 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 731 transitions. Word has length 17 [2021-07-13 19:26:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:10,687 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 731 transitions. [2021-07-13 19:26:10,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 731 transitions. [2021-07-13 19:26:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:10,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:10,687 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:10,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7946,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:10,888 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:10,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1050630265, now seen corresponding path program 94 times [2021-07-13 19:26:10,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:10,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902891764] [2021-07-13 19:26:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:10,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:10,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902891764] [2021-07-13 19:26:10,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902891764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678153633] [2021-07-13 19:26:10,923 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 [2021-07-13 19:26:10,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678153633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:10,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:10,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:10,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467015442] [2021-07-13 19:26:10,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:10,975 INFO L87 Difference]: Start difference. First operand 247 states and 731 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:11,082 INFO L93 Difference]: Finished difference Result 335 states and 866 transitions. [2021-07-13 19:26:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:11,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:11,083 INFO L225 Difference]: With dead ends: 335 [2021-07-13 19:26:11,083 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:26:11,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:26:11,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 244. [2021-07-13 19:26:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-07-13 19:26:11,086 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-07-13 19:26:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:11,086 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-07-13 19:26:11,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-07-13 19:26:11,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:11,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:11,086 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:11,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7947,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:11,301 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:11,301 INFO L82 PathProgramCache]: Analyzing trace with hash 432504673, now seen corresponding path program 95 times [2021-07-13 19:26:11,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:11,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116958876] [2021-07-13 19:26:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116958876] [2021-07-13 19:26:11,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116958876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417346374] [2021-07-13 19:26:11,338 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 [2021-07-13 19:26:11,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:11,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:11,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:11,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417346374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:11,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:11,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385585715] [2021-07-13 19:26:11,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:11,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:11,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:11,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:11,392 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:11,507 INFO L93 Difference]: Finished difference Result 346 states and 896 transitions. [2021-07-13 19:26:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:11,508 INFO L225 Difference]: With dead ends: 346 [2021-07-13 19:26:11,508 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 19:26:11,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:11,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 19:26:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 244. [2021-07-13 19:26:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.97119341563786) internal successors, (722), 243 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 722 transitions. [2021-07-13 19:26:11,511 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 722 transitions. Word has length 17 [2021-07-13 19:26:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:11,511 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 722 transitions. [2021-07-13 19:26:11,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 722 transitions. [2021-07-13 19:26:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:26:11,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:11,512 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:11,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7948,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:11,728 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -834952505, now seen corresponding path program 96 times [2021-07-13 19:26:11,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:11,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85209151] [2021-07-13 19:26:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:11,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85209151] [2021-07-13 19:26:11,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85209151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573913075] [2021-07-13 19:26:11,767 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 [2021-07-13 19:26:11,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:11,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:11,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:11,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573913075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:11,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:11,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171351518] [2021-07-13 19:26:11,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:11,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:11,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:11,820 INFO L87 Difference]: Start difference. First operand 244 states and 722 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:11,936 INFO L93 Difference]: Finished difference Result 385 states and 1019 transitions. [2021-07-13 19:26:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:26:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:11,937 INFO L225 Difference]: With dead ends: 385 [2021-07-13 19:26:11,937 INFO L226 Difference]: Without dead ends: 385 [2021-07-13 19:26:11,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-07-13 19:26:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2021-07-13 19:26:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9721115537848606) internal successors, (746), 251 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 746 transitions. [2021-07-13 19:26:11,941 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 746 transitions. Word has length 17 [2021-07-13 19:26:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:11,941 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 746 transitions. [2021-07-13 19:26:11,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 746 transitions. [2021-07-13 19:26:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:11,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:11,941 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:12,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7949 [2021-07-13 19:26:12,142 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash -702501620, now seen corresponding path program 97 times [2021-07-13 19:26:12,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:12,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370885186] [2021-07-13 19:26:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:12,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:12,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370885186] [2021-07-13 19:26:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370885186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:12,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701313624] [2021-07-13 19:26:12,222 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 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 [2021-07-13 19:26:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:12,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:12,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:12,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:13,388 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-07-13 19:26:13,491 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 217 [2021-07-13 19:26:13,610 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 221 [2021-07-13 19:26:13,766 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 232 [2021-07-13 19:26:14,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:14,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:14,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:14,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:14,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701313624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:14,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:14,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062097154] [2021-07-13 19:26:14,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:14,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:14,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:14,028 INFO L87 Difference]: Start difference. First operand 252 states and 746 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:14,301 INFO L93 Difference]: Finished difference Result 306 states and 891 transitions. [2021-07-13 19:26:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-13 19:26:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:14,302 INFO L225 Difference]: With dead ends: 306 [2021-07-13 19:26:14,302 INFO L226 Difference]: Without dead ends: 301 [2021-07-13 19:26:14,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-13 19:26:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 272. [2021-07-13 19:26:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-07-13 19:26:14,305 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-07-13 19:26:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:14,306 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-07-13 19:26:14,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-07-13 19:26:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:14,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:14,306 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:14,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7950 [2021-07-13 19:26:14,522 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1857651606, now seen corresponding path program 98 times [2021-07-13 19:26:14,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:14,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911974783] [2021-07-13 19:26:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:14,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911974783] [2021-07-13 19:26:14,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911974783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575096187] [2021-07-13 19:26:14,620 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 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 [2021-07-13 19:26:14,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:14,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:14,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:14,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:15,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:15,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:15,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:15,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:15,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575096187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:15,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:15,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:15,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035492905] [2021-07-13 19:26:15,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:15,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:15,482 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:16,124 INFO L93 Difference]: Finished difference Result 402 states and 1031 transitions. [2021-07-13 19:26:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:26:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:16,125 INFO L225 Difference]: With dead ends: 402 [2021-07-13 19:26:16,125 INFO L226 Difference]: Without dead ends: 392 [2021-07-13 19:26:16,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:26:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-13 19:26:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 272. [2021-07-13 19:26:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.992619926199262) internal successors, (811), 271 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 811 transitions. [2021-07-13 19:26:16,129 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 811 transitions. Word has length 18 [2021-07-13 19:26:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:16,129 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 811 transitions. [2021-07-13 19:26:16,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 811 transitions. [2021-07-13 19:26:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:16,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:16,129 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:16,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-07-13 19:26:16,333 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash 801291561, now seen corresponding path program 99 times [2021-07-13 19:26:16,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:16,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505934999] [2021-07-13 19:26:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:16,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:16,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505934999] [2021-07-13 19:26:16,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505934999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242133883] [2021-07-13 19:26:16,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:16,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:26:16,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:16,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:16,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242133883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:16,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:16,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453202459] [2021-07-13 19:26:16,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:16,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:16,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:16,427 INFO L87 Difference]: Start difference. First operand 272 states and 811 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:16,481 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-07-13 19:26:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:16,482 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:26:16,482 INFO L226 Difference]: Without dead ends: 460 [2021-07-13 19:26:16,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-07-13 19:26:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 274. [2021-07-13 19:26:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9963369963369964) internal successors, (818), 273 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 818 transitions. [2021-07-13 19:26:16,486 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 818 transitions. Word has length 18 [2021-07-13 19:26:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:16,486 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 818 transitions. [2021-07-13 19:26:16,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 818 transitions. [2021-07-13 19:26:16,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:16,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:16,486 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:16,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8259 [2021-07-13 19:26:16,687 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -640313607, now seen corresponding path program 100 times [2021-07-13 19:26:16,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:16,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87338301] [2021-07-13 19:26:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:16,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:16,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87338301] [2021-07-13 19:26:16,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87338301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620159480] [2021-07-13 19:26:16,722 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 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 [2021-07-13 19:26:16,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:16,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:16,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:16,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620159480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:16,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:26:16,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023746515] [2021-07-13 19:26:16,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:16,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:16,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:16,777 INFO L87 Difference]: Start difference. First operand 274 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:16,843 INFO L93 Difference]: Finished difference Result 492 states and 1194 transitions. [2021-07-13 19:26:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:16,844 INFO L225 Difference]: With dead ends: 492 [2021-07-13 19:26:16,844 INFO L226 Difference]: Without dead ends: 492 [2021-07-13 19:26:16,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-13 19:26:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 276. [2021-07-13 19:26:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-07-13 19:26:16,848 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-07-13 19:26:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:16,849 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-07-13 19:26:16,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-07-13 19:26:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:16,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:16,849 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:17,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8260 [2021-07-13 19:26:17,050 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:17,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1790860340, now seen corresponding path program 101 times [2021-07-13 19:26:17,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:17,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88942556] [2021-07-13 19:26:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:17,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:17,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88942556] [2021-07-13 19:26:17,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88942556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:17,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278387823] [2021-07-13 19:26:17,147 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 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 [2021-07-13 19:26:17,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:17,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:17,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:17,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:17,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:17,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:17,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:17,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278387823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:17,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:17,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:17,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137994749] [2021-07-13 19:26:17,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:17,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:17,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:17,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:17,756 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:17,948 INFO L93 Difference]: Finished difference Result 323 states and 904 transitions. [2021-07-13 19:26:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-13 19:26:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:17,949 INFO L225 Difference]: With dead ends: 323 [2021-07-13 19:26:17,949 INFO L226 Difference]: Without dead ends: 318 [2021-07-13 19:26:17,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-07-13 19:26:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-07-13 19:26:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.0) internal successors, (825), 275 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 825 transitions. [2021-07-13 19:26:17,952 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 825 transitions. Word has length 18 [2021-07-13 19:26:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:17,953 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 825 transitions. [2021-07-13 19:26:17,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 825 transitions. [2021-07-13 19:26:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:17,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:17,953 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:18,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8261,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:18,169 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2026934802, now seen corresponding path program 102 times [2021-07-13 19:26:18,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:18,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382953760] [2021-07-13 19:26:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:18,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:18,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382953760] [2021-07-13 19:26:18,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382953760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:18,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413676978] [2021-07-13 19:26:18,260 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 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 [2021-07-13 19:26:18,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:18,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:18,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:18,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:18,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:19,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:19,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:19,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:19,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:19,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413676978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:19,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:19,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:19,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518508083] [2021-07-13 19:26:19,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:19,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:19,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:19,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:19,066 INFO L87 Difference]: Start difference. First operand 276 states and 825 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:19,412 INFO L93 Difference]: Finished difference Result 333 states and 930 transitions. [2021-07-13 19:26:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:26:19,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:19,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:19,413 INFO L225 Difference]: With dead ends: 333 [2021-07-13 19:26:19,413 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:26:19,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:26:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:26:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 278. [2021-07-13 19:26:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9819494584837547) internal successors, (826), 277 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 826 transitions. [2021-07-13 19:26:19,416 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 826 transitions. Word has length 18 [2021-07-13 19:26:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:19,416 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 826 transitions. [2021-07-13 19:26:19,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 826 transitions. [2021-07-13 19:26:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:19,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:19,417 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:19,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8358 [2021-07-13 19:26:19,618 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:19,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1194947114, now seen corresponding path program 103 times [2021-07-13 19:26:19,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:19,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390502384] [2021-07-13 19:26:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:19,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:19,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390502384] [2021-07-13 19:26:19,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390502384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:19,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891874324] [2021-07-13 19:26:19,693 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 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 [2021-07-13 19:26:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:19,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:19,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:19,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:20,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:20,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:20,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:20,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:20,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891874324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:20,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:20,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:20,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232413880] [2021-07-13 19:26:20,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:20,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:20,962 INFO L87 Difference]: Start difference. First operand 278 states and 826 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:21,417 INFO L93 Difference]: Finished difference Result 351 states and 960 transitions. [2021-07-13 19:26:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:26:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:21,418 INFO L225 Difference]: With dead ends: 351 [2021-07-13 19:26:21,418 INFO L226 Difference]: Without dead ends: 338 [2021-07-13 19:26:21,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-07-13 19:26:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 280. [2021-07-13 19:26:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-07-13 19:26:21,422 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-07-13 19:26:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:21,422 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-07-13 19:26:21,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-07-13 19:26:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:21,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:21,422 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:21,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8465 [2021-07-13 19:26:21,623 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:21,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1914566441, now seen corresponding path program 104 times [2021-07-13 19:26:21,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:21,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550576157] [2021-07-13 19:26:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:21,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:21,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550576157] [2021-07-13 19:26:21,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550576157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134421305] [2021-07-13 19:26:21,663 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 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 [2021-07-13 19:26:21,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:21,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:21,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134421305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:21,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:21,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375652973] [2021-07-13 19:26:21,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:21,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:21,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:21,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:21,716 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:21,817 INFO L93 Difference]: Finished difference Result 527 states and 1263 transitions. [2021-07-13 19:26:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:21,818 INFO L225 Difference]: With dead ends: 527 [2021-07-13 19:26:21,818 INFO L226 Difference]: Without dead ends: 527 [2021-07-13 19:26:21,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-13 19:26:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 280. [2021-07-13 19:26:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-07-13 19:26:21,822 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-07-13 19:26:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:21,822 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-07-13 19:26:21,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,822 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-07-13 19:26:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:21,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:21,823 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:22,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8636,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:22,023 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:22,024 INFO L82 PathProgramCache]: Analyzing trace with hash 607356086, now seen corresponding path program 105 times [2021-07-13 19:26:22,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:22,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407257614] [2021-07-13 19:26:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:22,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:22,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407257614] [2021-07-13 19:26:22,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407257614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:22,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622949813] [2021-07-13 19:26:22,119 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 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 [2021-07-13 19:26:22,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:22,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:22,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:22,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:22,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:22,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:23,008 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 284 [2021-07-13 19:26:23,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:23,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:23,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:23,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622949813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:23,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:23,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983916804] [2021-07-13 19:26:23,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:23,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:23,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:23,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:23,802 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,041 INFO L93 Difference]: Finished difference Result 307 states and 875 transitions. [2021-07-13 19:26:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:24,042 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-13 19:26:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,042 INFO L225 Difference]: With dead ends: 307 [2021-07-13 19:26:24,042 INFO L226 Difference]: Without dead ends: 302 [2021-07-13 19:26:24,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-07-13 19:26:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-07-13 19:26:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.967741935483871) internal successors, (828), 279 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 828 transitions. [2021-07-13 19:26:24,046 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 828 transitions. Word has length 18 [2021-07-13 19:26:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,046 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 828 transitions. [2021-07-13 19:26:24,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 828 transitions. [2021-07-13 19:26:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:24,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:24,046 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:24,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8637 [2021-07-13 19:26:24,247 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash -520040007, now seen corresponding path program 106 times [2021-07-13 19:26:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998486523] [2021-07-13 19:26:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998486523] [2021-07-13 19:26:24,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998486523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:24,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965851959] [2021-07-13 19:26:24,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:24,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:24,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:24,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965851959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:24,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:24,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:24,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754385744] [2021-07-13 19:26:24,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:24,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:24,334 INFO L87 Difference]: Start difference. First operand 280 states and 828 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,389 INFO L93 Difference]: Finished difference Result 474 states and 1151 transitions. [2021-07-13 19:26:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:24,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-13 19:26:24,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:24,390 INFO L225 Difference]: With dead ends: 474 [2021-07-13 19:26:24,390 INFO L226 Difference]: Without dead ends: 474 [2021-07-13 19:26:24,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-13 19:26:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 291. [2021-07-13 19:26:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.986206896551724) internal successors, (866), 290 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 866 transitions. [2021-07-13 19:26:24,394 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 866 transitions. Word has length 18 [2021-07-13 19:26:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:24,394 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 866 transitions. [2021-07-13 19:26:24,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 866 transitions. [2021-07-13 19:26:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:24,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:24,394 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:24,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8817,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:24,595 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash -701803756, now seen corresponding path program 107 times [2021-07-13 19:26:24,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:24,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706331854] [2021-07-13 19:26:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:24,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706331854] [2021-07-13 19:26:24,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706331854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22781891] [2021-07-13 19:26:24,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:24,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:24,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:24,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:24,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:25,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:25,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:25,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:25,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22781891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:25,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:25,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788612605] [2021-07-13 19:26:25,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:25,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:25,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:25,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:25,422 INFO L87 Difference]: Start difference. First operand 291 states and 866 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:25,714 INFO L93 Difference]: Finished difference Result 373 states and 1019 transitions. [2021-07-13 19:26:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:26:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:25,715 INFO L225 Difference]: With dead ends: 373 [2021-07-13 19:26:25,715 INFO L226 Difference]: Without dead ends: 356 [2021-07-13 19:26:25,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:26:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-07-13 19:26:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 291. [2021-07-13 19:26:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.9689655172413794) internal successors, (861), 290 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-07-13 19:26:25,718 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 18 [2021-07-13 19:26:25,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:25,718 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-07-13 19:26:25,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-07-13 19:26:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:25,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:25,719 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:25,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8818,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:25,919 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash 17815571, now seen corresponding path program 108 times [2021-07-13 19:26:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:25,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117348508] [2021-07-13 19:26:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117348508] [2021-07-13 19:26:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117348508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685716327] [2021-07-13 19:26:25,957 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 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 [2021-07-13 19:26:25,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:25,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685716327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:26,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:26,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816498285] [2021-07-13 19:26:26,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:26,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:26,009 INFO L87 Difference]: Start difference. First operand 291 states and 861 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:26,096 INFO L93 Difference]: Finished difference Result 514 states and 1221 transitions. [2021-07-13 19:26:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:26,096 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:26,097 INFO L225 Difference]: With dead ends: 514 [2021-07-13 19:26:26,097 INFO L226 Difference]: Without dead ends: 514 [2021-07-13 19:26:26,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-13 19:26:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 280. [2021-07-13 19:26:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.949820788530466) internal successors, (823), 279 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 823 transitions. [2021-07-13 19:26:26,101 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 823 transitions. Word has length 18 [2021-07-13 19:26:26,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:26,101 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 823 transitions. [2021-07-13 19:26:26,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,101 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 823 transitions. [2021-07-13 19:26:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:26,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:26,102 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:26,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8931,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:26,302 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:26,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:26,302 INFO L82 PathProgramCache]: Analyzing trace with hash -488530695, now seen corresponding path program 109 times [2021-07-13 19:26:26,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:26,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873058318] [2021-07-13 19:26:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:26,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873058318] [2021-07-13 19:26:26,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873058318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542696431] [2021-07-13 19:26:26,340 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 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 [2021-07-13 19:26:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542696431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:26,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:26,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751101643] [2021-07-13 19:26:26,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:26,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:26,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:26,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:26,397 INFO L87 Difference]: Start difference. First operand 280 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:26,527 INFO L93 Difference]: Finished difference Result 554 states and 1291 transitions. [2021-07-13 19:26:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:26,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:26,528 INFO L225 Difference]: With dead ends: 554 [2021-07-13 19:26:26,528 INFO L226 Difference]: Without dead ends: 554 [2021-07-13 19:26:26,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-13 19:26:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 283. [2021-07-13 19:26:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9397163120567376) internal successors, (829), 282 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 829 transitions. [2021-07-13 19:26:26,532 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 829 transitions. Word has length 18 [2021-07-13 19:26:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:26,532 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 829 transitions. [2021-07-13 19:26:26,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 829 transitions. [2021-07-13 19:26:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:26,532 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:26,532 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:26,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8932,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:26,733 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1937621260, now seen corresponding path program 110 times [2021-07-13 19:26:26,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:26,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589324630] [2021-07-13 19:26:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:26,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589324630] [2021-07-13 19:26:26,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589324630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198800661] [2021-07-13 19:26:26,832 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:26,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:26,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:26,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:27,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:27,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:27,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:27,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:27,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:27,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198800661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:27,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:27,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753636155] [2021-07-13 19:26:27,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:27,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:27,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:27,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:27,445 INFO L87 Difference]: Start difference. First operand 283 states and 829 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:27,596 INFO L93 Difference]: Finished difference Result 301 states and 868 transitions. [2021-07-13 19:26:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:27,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-13 19:26:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:27,597 INFO L225 Difference]: With dead ends: 301 [2021-07-13 19:26:27,597 INFO L226 Difference]: Without dead ends: 296 [2021-07-13 19:26:27,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-13 19:26:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-07-13 19:26:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.943462897526502) internal successors, (833), 283 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 833 transitions. [2021-07-13 19:26:27,600 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 833 transitions. Word has length 18 [2021-07-13 19:26:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:27,600 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 833 transitions. [2021-07-13 19:26:27,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 833 transitions. [2021-07-13 19:26:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:27,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:27,601 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:27,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:27,809 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:27,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1423882327, now seen corresponding path program 111 times [2021-07-13 19:26:27,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:27,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273107844] [2021-07-13 19:26:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:27,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273107844] [2021-07-13 19:26:27,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273107844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596741200] [2021-07-13 19:26:27,837 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 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 [2021-07-13 19:26:27,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:26:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:26:27,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596741200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:27,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:27,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:26:27,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663196652] [2021-07-13 19:26:27,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:27,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:27,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:27,890 INFO L87 Difference]: Start difference. First operand 284 states and 833 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:27,924 INFO L93 Difference]: Finished difference Result 435 states and 1110 transitions. [2021-07-13 19:26:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:27,925 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:26:27,925 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 19:26:27,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 19:26:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 311. [2021-07-13 19:26:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.967741935483871) internal successors, (920), 310 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 920 transitions. [2021-07-13 19:26:27,929 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 920 transitions. Word has length 18 [2021-07-13 19:26:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:27,929 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 920 transitions. [2021-07-13 19:26:27,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 920 transitions. [2021-07-13 19:26:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:27,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:27,930 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:28,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9072,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:28,145 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash 810225167, now seen corresponding path program 112 times [2021-07-13 19:26:28,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:28,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135977055] [2021-07-13 19:26:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:28,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135977055] [2021-07-13 19:26:28,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135977055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190164167] [2021-07-13 19:26:28,176 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 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 [2021-07-13 19:26:28,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:28,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190164167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:28,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:28,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:28,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031904442] [2021-07-13 19:26:28,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:28,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:28,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:28,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:28,227 INFO L87 Difference]: Start difference. First operand 311 states and 920 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:28,279 INFO L93 Difference]: Finished difference Result 471 states and 1163 transitions. [2021-07-13 19:26:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:26:28,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-13 19:26:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:28,280 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:26:28,280 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:26:28,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:26:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 309. [2021-07-13 19:26:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9642857142857144) internal successors, (913), 308 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 913 transitions. [2021-07-13 19:26:28,284 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 913 transitions. Word has length 18 [2021-07-13 19:26:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:28,284 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 913 transitions. [2021-07-13 19:26:28,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 913 transitions. [2021-07-13 19:26:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:28,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:28,285 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:28,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9073 [2021-07-13 19:26:28,502 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:28,503 INFO L82 PathProgramCache]: Analyzing trace with hash 628461418, now seen corresponding path program 113 times [2021-07-13 19:26:28,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:28,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267169332] [2021-07-13 19:26:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:28,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:28,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267169332] [2021-07-13 19:26:28,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267169332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:28,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644034428] [2021-07-13 19:26:28,587 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 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 [2021-07-13 19:26:28,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:28,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:28,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:28,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:29,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:29,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:29,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:29,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644034428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:29,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:29,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:29,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471483074] [2021-07-13 19:26:29,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:29,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:29,271 INFO L87 Difference]: Start difference. First operand 309 states and 913 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:29,554 INFO L93 Difference]: Finished difference Result 383 states and 1039 transitions. [2021-07-13 19:26:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:26:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:29,555 INFO L225 Difference]: With dead ends: 383 [2021-07-13 19:26:29,555 INFO L226 Difference]: Without dead ends: 366 [2021-07-13 19:26:29,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:26:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-07-13 19:26:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 309. [2021-07-13 19:26:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-07-13 19:26:29,558 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-07-13 19:26:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:29,558 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-07-13 19:26:29,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-07-13 19:26:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:29,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:29,559 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:29,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9074,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:29,760 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:29,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1348080745, now seen corresponding path program 114 times [2021-07-13 19:26:29,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:29,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82142329] [2021-07-13 19:26:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:29,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82142329] [2021-07-13 19:26:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82142329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586771169] [2021-07-13 19:26:29,798 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 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 [2021-07-13 19:26:29,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:29,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:29,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:29,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586771169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:29,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:29,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081540914] [2021-07-13 19:26:29,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:29,851 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:29,935 INFO L93 Difference]: Finished difference Result 503 states and 1214 transitions. [2021-07-13 19:26:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:29,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:29,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:29,946 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:26:29,946 INFO L226 Difference]: Without dead ends: 503 [2021-07-13 19:26:29,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:29,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-13 19:26:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 309. [2021-07-13 19:26:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-07-13 19:26:29,950 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-07-13 19:26:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:29,950 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-07-13 19:26:29,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-07-13 19:26:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:29,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:29,951 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:30,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9205 [2021-07-13 19:26:30,165 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:30,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:30,166 INFO L82 PathProgramCache]: Analyzing trace with hash 841734479, now seen corresponding path program 115 times [2021-07-13 19:26:30,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:30,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10822274] [2021-07-13 19:26:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:30,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:30,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10822274] [2021-07-13 19:26:30,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10822274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093171074] [2021-07-13 19:26:30,202 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 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 [2021-07-13 19:26:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093171074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:30,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:30,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944149792] [2021-07-13 19:26:30,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:30,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:30,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:30,266 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:30,401 INFO L93 Difference]: Finished difference Result 546 states and 1298 transitions. [2021-07-13 19:26:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:30,402 INFO L225 Difference]: With dead ends: 546 [2021-07-13 19:26:30,403 INFO L226 Difference]: Without dead ends: 546 [2021-07-13 19:26:30,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-13 19:26:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2021-07-13 19:26:30,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9545454545454546) internal successors, (910), 308 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 910 transitions. [2021-07-13 19:26:30,407 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 910 transitions. Word has length 18 [2021-07-13 19:26:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:30,407 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 910 transitions. [2021-07-13 19:26:30,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 910 transitions. [2021-07-13 19:26:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:30,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:30,407 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:30,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9206,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:30,611 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:30,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1970097879, now seen corresponding path program 116 times [2021-07-13 19:26:30,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:30,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814505323] [2021-07-13 19:26:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:30,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:30,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814505323] [2021-07-13 19:26:30,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814505323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610901870] [2021-07-13 19:26:30,651 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 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 [2021-07-13 19:26:30,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:30,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:30,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:30,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:30,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610901870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:30,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:30,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:30,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815240284] [2021-07-13 19:26:30,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:30,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:30,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:30,707 INFO L87 Difference]: Start difference. First operand 309 states and 910 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:30,875 INFO L93 Difference]: Finished difference Result 544 states and 1360 transitions. [2021-07-13 19:26:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:30,877 INFO L225 Difference]: With dead ends: 544 [2021-07-13 19:26:30,877 INFO L226 Difference]: Without dead ends: 544 [2021-07-13 19:26:30,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:26:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-13 19:26:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 311. [2021-07-13 19:26:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9548387096774196) internal successors, (916), 310 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-07-13 19:26:30,881 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 18 [2021-07-13 19:26:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:30,881 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-07-13 19:26:30,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-07-13 19:26:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:30,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:30,882 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:31,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9207,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:31,089 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash 226168694, now seen corresponding path program 117 times [2021-07-13 19:26:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:31,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510087042] [2021-07-13 19:26:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:31,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:31,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510087042] [2021-07-13 19:26:31,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510087042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867328001] [2021-07-13 19:26:31,182 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 [2021-07-13 19:26:31,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:31,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:31,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:26:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:31,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:31,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:31,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:31,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:31,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:31,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:31,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867328001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:31,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:31,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:31,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647256452] [2021-07-13 19:26:31,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:31,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:31,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:31,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:31,879 INFO L87 Difference]: Start difference. First operand 311 states and 916 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:32,093 INFO L93 Difference]: Finished difference Result 365 states and 1058 transitions. [2021-07-13 19:26:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-13 19:26:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:32,095 INFO L225 Difference]: With dead ends: 365 [2021-07-13 19:26:32,095 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 19:26:32,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:32,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 19:26:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2021-07-13 19:26:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-07-13 19:26:32,099 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-07-13 19:26:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:32,099 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-07-13 19:26:32,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-07-13 19:26:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:32,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:32,099 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:32,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9208,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:32,300 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:32,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:32,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1499310764, now seen corresponding path program 118 times [2021-07-13 19:26:32,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:32,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898205418] [2021-07-13 19:26:32,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:32,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:32,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898205418] [2021-07-13 19:26:32,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898205418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:32,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508589762] [2021-07-13 19:26:32,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:32,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:32,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:32,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:32,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:32,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:32,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:33,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:33,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:33,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:33,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:33,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508589762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:33,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:33,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:33,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605297946] [2021-07-13 19:26:33,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:33,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:33,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:33,611 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:33,972 INFO L93 Difference]: Finished difference Result 375 states and 1069 transitions. [2021-07-13 19:26:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:26:33,973 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:33,973 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:26:33,973 INFO L226 Difference]: Without dead ends: 370 [2021-07-13 19:26:33,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-13 19:26:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 329. [2021-07-13 19:26:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9969512195121952) internal successors, (983), 328 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 983 transitions. [2021-07-13 19:26:33,977 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 983 transitions. Word has length 18 [2021-07-13 19:26:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:33,978 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 983 transitions. [2021-07-13 19:26:33,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 983 transitions. [2021-07-13 19:26:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:33,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:33,978 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:34,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9304 [2021-07-13 19:26:34,179 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:34,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1159632403, now seen corresponding path program 119 times [2021-07-13 19:26:34,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:34,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339145919] [2021-07-13 19:26:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:34,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:34,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339145919] [2021-07-13 19:26:34,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339145919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518192272] [2021-07-13 19:26:34,210 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 [2021-07-13 19:26:34,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:34,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:34,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518192272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:34,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:34,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113471664] [2021-07-13 19:26:34,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:34,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:34,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:34,265 INFO L87 Difference]: Start difference. First operand 329 states and 983 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:34,313 INFO L93 Difference]: Finished difference Result 498 states and 1262 transitions. [2021-07-13 19:26:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:26:34,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-13 19:26:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:34,315 INFO L225 Difference]: With dead ends: 498 [2021-07-13 19:26:34,315 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:26:34,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:26:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 300. [2021-07-13 19:26:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9732441471571907) internal successors, (889), 299 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 889 transitions. [2021-07-13 19:26:34,319 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 889 transitions. Word has length 18 [2021-07-13 19:26:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:34,319 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 889 transitions. [2021-07-13 19:26:34,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 889 transitions. [2021-07-13 19:26:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:34,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:34,320 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:34,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9489 [2021-07-13 19:26:34,536 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -901227399, now seen corresponding path program 120 times [2021-07-13 19:26:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79034176] [2021-07-13 19:26:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:34,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:34,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79034176] [2021-07-13 19:26:34,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79034176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891064989] [2021-07-13 19:26:34,568 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 [2021-07-13 19:26:34,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:34,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:34,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:34,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891064989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:34,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:34,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573847589] [2021-07-13 19:26:34,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:34,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:34,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:34,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:34,618 INFO L87 Difference]: Start difference. First operand 300 states and 889 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:34,660 INFO L93 Difference]: Finished difference Result 440 states and 1150 transitions. [2021-07-13 19:26:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 18 [2021-07-13 19:26:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:34,661 INFO L225 Difference]: With dead ends: 440 [2021-07-13 19:26:34,661 INFO L226 Difference]: Without dead ends: 440 [2021-07-13 19:26:34,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-07-13 19:26:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 328. [2021-07-13 19:26:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9877675840978593) internal successors, (977), 327 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 977 transitions. [2021-07-13 19:26:34,665 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 977 transitions. Word has length 18 [2021-07-13 19:26:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:34,665 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 977 transitions. [2021-07-13 19:26:34,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 977 transitions. [2021-07-13 19:26:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:34,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:34,666 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:34,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9490,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:34,876 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1082991148, now seen corresponding path program 121 times [2021-07-13 19:26:34,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:34,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440319652] [2021-07-13 19:26:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:34,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:34,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440319652] [2021-07-13 19:26:34,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440319652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:34,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787446035] [2021-07-13 19:26:34,946 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 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 [2021-07-13 19:26:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:35,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:35,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:35,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:35,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:35,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:35,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787446035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:35,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:35,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:35,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975768422] [2021-07-13 19:26:35,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:35,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:35,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:35,868 INFO L87 Difference]: Start difference. First operand 328 states and 977 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:36,148 INFO L93 Difference]: Finished difference Result 386 states and 1061 transitions. [2021-07-13 19:26:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:26:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:36,150 INFO L225 Difference]: With dead ends: 386 [2021-07-13 19:26:36,150 INFO L226 Difference]: Without dead ends: 373 [2021-07-13 19:26:36,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:26:36,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-13 19:26:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 328. [2021-07-13 19:26:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.984709480122324) internal successors, (976), 327 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 976 transitions. [2021-07-13 19:26:36,154 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 976 transitions. Word has length 18 [2021-07-13 19:26:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:36,154 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 976 transitions. [2021-07-13 19:26:36,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 976 transitions. [2021-07-13 19:26:36,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:36,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:36,154 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:36,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9491,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:36,355 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:36,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:36,355 INFO L82 PathProgramCache]: Analyzing trace with hash -363371821, now seen corresponding path program 122 times [2021-07-13 19:26:36,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:36,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543236133] [2021-07-13 19:26:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:36,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:36,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543236133] [2021-07-13 19:26:36,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543236133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:36,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173644773] [2021-07-13 19:26:36,394 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 [2021-07-13 19:26:36,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:36,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173644773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:36,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:36,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:36,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026652454] [2021-07-13 19:26:36,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:36,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:36,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:36,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:36,446 INFO L87 Difference]: Start difference. First operand 328 states and 976 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:36,517 INFO L93 Difference]: Finished difference Result 472 states and 1196 transitions. [2021-07-13 19:26:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:36,519 INFO L225 Difference]: With dead ends: 472 [2021-07-13 19:26:36,519 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:26:36,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:36,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:26:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 312. [2021-07-13 19:26:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.9710610932475885) internal successors, (924), 311 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 924 transitions. [2021-07-13 19:26:36,523 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 924 transitions. Word has length 18 [2021-07-13 19:26:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:36,523 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 924 transitions. [2021-07-13 19:26:36,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 924 transitions. [2021-07-13 19:26:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:36,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:36,523 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:36,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9650 [2021-07-13 19:26:36,739 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:36,740 INFO L82 PathProgramCache]: Analyzing trace with hash -869718087, now seen corresponding path program 123 times [2021-07-13 19:26:36,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:36,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805987011] [2021-07-13 19:26:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:36,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:36,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805987011] [2021-07-13 19:26:36,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805987011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:36,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860937376] [2021-07-13 19:26:36,776 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 [2021-07-13 19:26:36,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:26:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:36,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860937376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:36,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:36,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:36,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729964947] [2021-07-13 19:26:36,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:36,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:36,839 INFO L87 Difference]: Start difference. First operand 312 states and 924 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:36,960 INFO L93 Difference]: Finished difference Result 490 states and 1202 transitions. [2021-07-13 19:26:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:26:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:36,961 INFO L225 Difference]: With dead ends: 490 [2021-07-13 19:26:36,961 INFO L226 Difference]: Without dead ends: 490 [2021-07-13 19:26:36,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-13 19:26:36,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 300. [2021-07-13 19:26:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.9665551839464883) internal successors, (887), 299 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 887 transitions. [2021-07-13 19:26:36,965 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 887 transitions. Word has length 18 [2021-07-13 19:26:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:36,965 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 887 transitions. [2021-07-13 19:26:36,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 887 transitions. [2021-07-13 19:26:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:36,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:36,966 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:37,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9651,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:37,167 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash 613416851, now seen corresponding path program 124 times [2021-07-13 19:26:37,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:37,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630448480] [2021-07-13 19:26:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:37,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:37,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630448480] [2021-07-13 19:26:37,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630448480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:37,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552545836] [2021-07-13 19:26:37,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:37,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:37,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:37,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:37,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552545836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:37,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:37,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:37,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845635291] [2021-07-13 19:26:37,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:37,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:37,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:37,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:37,262 INFO L87 Difference]: Start difference. First operand 300 states and 887 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:37,421 INFO L93 Difference]: Finished difference Result 433 states and 1094 transitions. [2021-07-13 19:26:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:37,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:37,423 INFO L225 Difference]: With dead ends: 433 [2021-07-13 19:26:37,423 INFO L226 Difference]: Without dead ends: 433 [2021-07-13 19:26:37,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-13 19:26:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 294. [2021-07-13 19:26:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9658703071672354) internal successors, (869), 293 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-07-13 19:26:37,427 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 18 [2021-07-13 19:26:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:37,427 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-07-13 19:26:37,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-07-13 19:26:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:37,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:37,427 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:37,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9652 [2021-07-13 19:26:37,644 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:37,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash -654040327, now seen corresponding path program 125 times [2021-07-13 19:26:37,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:37,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174446448] [2021-07-13 19:26:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:37,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:37,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174446448] [2021-07-13 19:26:37,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174446448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:37,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870473423] [2021-07-13 19:26:37,683 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 [2021-07-13 19:26:37,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:26:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:37,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870473423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:37,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:37,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:37,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008260322] [2021-07-13 19:26:37,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:37,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:37,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:37,739 INFO L87 Difference]: Start difference. First operand 294 states and 869 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:37,908 INFO L93 Difference]: Finished difference Result 474 states and 1217 transitions. [2021-07-13 19:26:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:26:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:37,910 INFO L225 Difference]: With dead ends: 474 [2021-07-13 19:26:37,910 INFO L226 Difference]: Without dead ends: 474 [2021-07-13 19:26:37,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:26:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-07-13 19:26:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 298. [2021-07-13 19:26:37,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.9663299663299663) internal successors, (881), 297 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 881 transitions. [2021-07-13 19:26:37,914 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 881 transitions. Word has length 18 [2021-07-13 19:26:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:37,914 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 881 transitions. [2021-07-13 19:26:37,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 881 transitions. [2021-07-13 19:26:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:37,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:37,915 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:38,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9653 [2021-07-13 19:26:38,115 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:38,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:38,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1289253300, now seen corresponding path program 126 times [2021-07-13 19:26:38,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:38,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461653819] [2021-07-13 19:26:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:38,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:38,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461653819] [2021-07-13 19:26:38,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461653819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:38,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603214868] [2021-07-13 19:26:38,211 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 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 [2021-07-13 19:26:38,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:26:38,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:38,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:38,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:39,537 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 234 [2021-07-13 19:26:39,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:39,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:39,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:39,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603214868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:39,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:39,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:39,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897894997] [2021-07-13 19:26:39,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:39,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:39,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:39,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:39,757 INFO L87 Difference]: Start difference. First operand 298 states and 881 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:40,078 INFO L93 Difference]: Finished difference Result 381 states and 1116 transitions. [2021-07-13 19:26:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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 18 [2021-07-13 19:26:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:40,079 INFO L225 Difference]: With dead ends: 381 [2021-07-13 19:26:40,079 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:26:40,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:26:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 341. [2021-07-13 19:26:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-07-13 19:26:40,084 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-07-13 19:26:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:40,084 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-07-13 19:26:40,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 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) [2021-07-13 19:26:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-07-13 19:26:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:40,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:40,084 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:40,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9654 [2021-07-13 19:26:40,285 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1280234538, now seen corresponding path program 127 times [2021-07-13 19:26:40,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:40,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822370599] [2021-07-13 19:26:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:40,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822370599] [2021-07-13 19:26:40,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822370599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:40,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510307896] [2021-07-13 19:26:40,390 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 [2021-07-13 19:26:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:40,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:40,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:40,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:41,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:41,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:41,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:41,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:41,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510307896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:41,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:41,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:41,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601761526] [2021-07-13 19:26:41,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:41,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:41,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:41,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:41,649 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:42,086 INFO L93 Difference]: Finished difference Result 396 states and 1134 transitions. [2021-07-13 19:26:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:26:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:42,087 INFO L225 Difference]: With dead ends: 396 [2021-07-13 19:26:42,087 INFO L226 Difference]: Without dead ends: 391 [2021-07-13 19:26:42,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:26:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-13 19:26:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 341. [2021-07-13 19:26:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0352941176470587) internal successors, (1032), 340 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1032 transitions. [2021-07-13 19:26:42,091 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1032 transitions. Word has length 18 [2021-07-13 19:26:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:42,091 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1032 transitions. [2021-07-13 19:26:42,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1032 transitions. [2021-07-13 19:26:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:42,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:42,092 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:42,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9843,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:42,293 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash -355789591, now seen corresponding path program 128 times [2021-07-13 19:26:42,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:42,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377355935] [2021-07-13 19:26:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:42,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377355935] [2021-07-13 19:26:42,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377355935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570428885] [2021-07-13 19:26:42,343 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 [2021-07-13 19:26:42,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:42,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:42,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:42,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570428885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:42,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:42,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:42,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629016717] [2021-07-13 19:26:42,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:42,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:42,403 INFO L87 Difference]: Start difference. First operand 341 states and 1032 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:42,465 INFO L93 Difference]: Finished difference Result 539 states and 1358 transitions. [2021-07-13 19:26:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:42,466 INFO L225 Difference]: With dead ends: 539 [2021-07-13 19:26:42,466 INFO L226 Difference]: Without dead ends: 539 [2021-07-13 19:26:42,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-13 19:26:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 352. [2021-07-13 19:26:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.0484330484330484) internal successors, (1070), 351 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1070 transitions. [2021-07-13 19:26:42,471 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1070 transitions. Word has length 18 [2021-07-13 19:26:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:42,471 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1070 transitions. [2021-07-13 19:26:42,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1070 transitions. [2021-07-13 19:26:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:42,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:42,472 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:42,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10082 [2021-07-13 19:26:42,685 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:42,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1878317903, now seen corresponding path program 129 times [2021-07-13 19:26:42,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:42,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536236640] [2021-07-13 19:26:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:42,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536236640] [2021-07-13 19:26:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536236640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:42,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597222686] [2021-07-13 19:26:42,726 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 [2021-07-13 19:26:42,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:42,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:42,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597222686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:42,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:42,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:42,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003143100] [2021-07-13 19:26:42,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:42,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:42,778 INFO L87 Difference]: Start difference. First operand 352 states and 1070 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:42,838 INFO L93 Difference]: Finished difference Result 516 states and 1352 transitions. [2021-07-13 19:26:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:42,839 INFO L225 Difference]: With dead ends: 516 [2021-07-13 19:26:42,839 INFO L226 Difference]: Without dead ends: 516 [2021-07-13 19:26:42,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-07-13 19:26:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 368. [2021-07-13 19:26:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-07-13 19:26:42,844 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-07-13 19:26:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:42,845 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-07-13 19:26:42,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-07-13 19:26:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:42,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:42,845 INFO L508 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:43,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10083 [2021-07-13 19:26:43,046 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:43,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1696554154, now seen corresponding path program 130 times [2021-07-13 19:26:43,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:43,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090158831] [2021-07-13 19:26:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:43,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:43,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:43,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090158831] [2021-07-13 19:26:43,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090158831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:43,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712935413] [2021-07-13 19:26:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:43,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 19:26:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:43,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:43,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-13 19:26:43,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:26:43,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:26:43,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:26:43,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-13 19:26:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:43,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712935413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:43,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:43,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:26:43,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941233093] [2021-07-13 19:26:43,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:26:43,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:26:43,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:43,795 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:44,068 INFO L93 Difference]: Finished difference Result 420 states and 1201 transitions. [2021-07-13 19:26:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:26:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:44,069 INFO L225 Difference]: With dead ends: 420 [2021-07-13 19:26:44,069 INFO L226 Difference]: Without dead ends: 415 [2021-07-13 19:26:44,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:26:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-13 19:26:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 368. [2021-07-13 19:26:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0626702997275204) internal successors, (1124), 367 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1124 transitions. [2021-07-13 19:26:44,073 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1124 transitions. Word has length 18 [2021-07-13 19:26:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:44,073 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1124 transitions. [2021-07-13 19:26:44,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1124 transitions. [2021-07-13 19:26:44,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:44,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:44,074 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:44,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10084,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:44,281 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1878793815, now seen corresponding path program 131 times [2021-07-13 19:26:44,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:44,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720422336] [2021-07-13 19:26:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:44,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:44,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720422336] [2021-07-13 19:26:44,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720422336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:44,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689305737] [2021-07-13 19:26:44,322 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 [2021-07-13 19:26:44,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:44,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:44,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689305737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:44,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:44,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362563828] [2021-07-13 19:26:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:44,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:44,373 INFO L87 Difference]: Start difference. First operand 368 states and 1124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:44,431 INFO L93 Difference]: Finished difference Result 489 states and 1363 transitions. [2021-07-13 19:26:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:26:44,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:44,432 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:26:44,432 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:26:44,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:26:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 401. [2021-07-13 19:26:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 3.0625) internal successors, (1225), 400 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1225 transitions. [2021-07-13 19:26:44,437 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1225 transitions. Word has length 18 [2021-07-13 19:26:44,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:44,437 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1225 transitions. [2021-07-13 19:26:44,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1225 transitions. [2021-07-13 19:26:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:44,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:44,437 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:44,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10193 [2021-07-13 19:26:44,638 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:44,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1909827215, now seen corresponding path program 132 times [2021-07-13 19:26:44,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:44,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49429823] [2021-07-13 19:26:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:44,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:44,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49429823] [2021-07-13 19:26:44,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49429823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:44,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779777563] [2021-07-13 19:26:44,680 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 [2021-07-13 19:26:44,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:44,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:44,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:44,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:44,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779777563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:44,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:44,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:44,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791536059] [2021-07-13 19:26:44,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:44,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:44,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:44,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:44,750 INFO L87 Difference]: Start difference. First operand 401 states and 1225 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:44,846 INFO L93 Difference]: Finished difference Result 521 states and 1410 transitions. [2021-07-13 19:26:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:44,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:44,847 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:26:44,847 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:26:44,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:26:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-07-13 19:26:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 3.0606060606060606) internal successors, (1212), 396 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1212 transitions. [2021-07-13 19:26:44,852 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1212 transitions. Word has length 18 [2021-07-13 19:26:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:44,852 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1212 transitions. [2021-07-13 19:26:44,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1212 transitions. [2021-07-13 19:26:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:44,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:44,853 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:45,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10194,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:45,053 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash -902005143, now seen corresponding path program 133 times [2021-07-13 19:26:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:45,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791472607] [2021-07-13 19:26:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:45,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791472607] [2021-07-13 19:26:45,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791472607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208648342] [2021-07-13 19:26:45,096 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 [2021-07-13 19:26:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:45,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208648342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:45,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:45,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173378011] [2021-07-13 19:26:45,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:45,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:45,153 INFO L87 Difference]: Start difference. First operand 397 states and 1212 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:45,274 INFO L93 Difference]: Finished difference Result 501 states and 1377 transitions. [2021-07-13 19:26:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:45,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:45,275 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:26:45,276 INFO L226 Difference]: Without dead ends: 501 [2021-07-13 19:26:45,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:26:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-13 19:26:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 394. [2021-07-13 19:26:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-07-13 19:26:45,280 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-07-13 19:26:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:45,281 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-07-13 19:26:45,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-07-13 19:26:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:45,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:45,281 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:45,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10195,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:45,497 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:45,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:45,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2125504975, now seen corresponding path program 134 times [2021-07-13 19:26:45,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597929596] [2021-07-13 19:26:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597929596] [2021-07-13 19:26:45,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597929596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787443713] [2021-07-13 19:26:45,540 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 [2021-07-13 19:26:45,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:45,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:45,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:45,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787443713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:45,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693382531] [2021-07-13 19:26:45,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:45,595 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:45,720 INFO L93 Difference]: Finished difference Result 512 states and 1422 transitions. [2021-07-13 19:26:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:45,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:45,721 INFO L225 Difference]: With dead ends: 512 [2021-07-13 19:26:45,721 INFO L226 Difference]: Without dead ends: 512 [2021-07-13 19:26:45,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:26:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-13 19:26:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 394. [2021-07-13 19:26:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.0610687022900764) internal successors, (1203), 393 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1203 transitions. [2021-07-13 19:26:45,726 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1203 transitions. Word has length 18 [2021-07-13 19:26:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:45,726 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1203 transitions. [2021-07-13 19:26:45,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1203 transitions. [2021-07-13 19:26:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:26:45,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:45,727 INFO L508 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:45,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10196,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:45,941 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1489038121, now seen corresponding path program 135 times [2021-07-13 19:26:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:45,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341105689] [2021-07-13 19:26:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:45,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341105689] [2021-07-13 19:26:45,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341105689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:45,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398321666] [2021-07-13 19:26:45,986 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 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 [2021-07-13 19:26:46,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:46,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:26:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:46,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398321666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:46,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:46,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:46,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243788014] [2021-07-13 19:26:46,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:46,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:46,044 INFO L87 Difference]: Start difference. First operand 394 states and 1203 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:46,181 INFO L93 Difference]: Finished difference Result 594 states and 1635 transitions. [2021-07-13 19:26:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:46,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:26:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:46,182 INFO L225 Difference]: With dead ends: 594 [2021-07-13 19:26:46,182 INFO L226 Difference]: Without dead ends: 594 [2021-07-13 19:26:46,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:26:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-13 19:26:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-07-13 19:26:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 3.0597014925373136) internal successors, (1230), 402 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1230 transitions. [2021-07-13 19:26:46,188 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1230 transitions. Word has length 18 [2021-07-13 19:26:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:46,188 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1230 transitions. [2021-07-13 19:26:46,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1230 transitions. [2021-07-13 19:26:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:46,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:46,189 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:46,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10197,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:46,409 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash 610808602, now seen corresponding path program 136 times [2021-07-13 19:26:46,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:46,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983673497] [2021-07-13 19:26:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:46,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:46,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983673497] [2021-07-13 19:26:46,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983673497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:46,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389210741] [2021-07-13 19:26:46,460 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 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 [2021-07-13 19:26:46,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:46,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:46,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:46,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389210741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:46,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:46,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:46,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817429525] [2021-07-13 19:26:46,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:46,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:46,521 INFO L87 Difference]: Start difference. First operand 403 states and 1230 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:46,641 INFO L93 Difference]: Finished difference Result 532 states and 1448 transitions. [2021-07-13 19:26:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:46,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:46,643 INFO L225 Difference]: With dead ends: 532 [2021-07-13 19:26:46,643 INFO L226 Difference]: Without dead ends: 532 [2021-07-13 19:26:46,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-13 19:26:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 415. [2021-07-13 19:26:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.07487922705314) internal successors, (1273), 414 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1273 transitions. [2021-07-13 19:26:46,648 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1273 transitions. Word has length 19 [2021-07-13 19:26:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:46,648 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1273 transitions. [2021-07-13 19:26:46,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1273 transitions. [2021-07-13 19:26:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:46,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:46,648 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:46,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10198 [2021-07-13 19:26:46,849 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 522898661, now seen corresponding path program 137 times [2021-07-13 19:26:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:46,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601053407] [2021-07-13 19:26:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:46,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:46,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601053407] [2021-07-13 19:26:46,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601053407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:46,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027617540] [2021-07-13 19:26:46,898 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 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 [2021-07-13 19:26:46,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:46,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:46,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:46,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:46,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027617540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:46,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:46,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:46,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651249246] [2021-07-13 19:26:46,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:46,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:46,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:46,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:46,952 INFO L87 Difference]: Start difference. First operand 415 states and 1273 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:47,131 INFO L93 Difference]: Finished difference Result 606 states and 1593 transitions. [2021-07-13 19:26:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:26:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:47,132 INFO L225 Difference]: With dead ends: 606 [2021-07-13 19:26:47,132 INFO L226 Difference]: Without dead ends: 597 [2021-07-13 19:26:47,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:26:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-13 19:26:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 419. [2021-07-13 19:26:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0717703349282295) internal successors, (1284), 418 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1284 transitions. [2021-07-13 19:26:47,137 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1284 transitions. Word has length 19 [2021-07-13 19:26:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:47,137 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1284 transitions. [2021-07-13 19:26:47,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1284 transitions. [2021-07-13 19:26:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:47,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:47,138 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:47,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10199 [2021-07-13 19:26:47,339 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash -544341384, now seen corresponding path program 138 times [2021-07-13 19:26:47,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:47,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262564737] [2021-07-13 19:26:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:47,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:47,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262564737] [2021-07-13 19:26:47,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262564737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930344029] [2021-07-13 19:26:47,384 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 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 [2021-07-13 19:26:47,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:47,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:47,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930344029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:47,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:47,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650466759] [2021-07-13 19:26:47,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:47,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:47,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:47,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:47,438 INFO L87 Difference]: Start difference. First operand 419 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:47,549 INFO L93 Difference]: Finished difference Result 466 states and 1355 transitions. [2021-07-13 19:26:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:47,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:47,550 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:26:47,550 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:26:47,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:26:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 421. [2021-07-13 19:26:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.057142857142857) internal successors, (1284), 420 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1284 transitions. [2021-07-13 19:26:47,555 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1284 transitions. Word has length 19 [2021-07-13 19:26:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:47,555 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1284 transitions. [2021-07-13 19:26:47,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1284 transitions. [2021-07-13 19:26:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:47,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:47,555 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:47,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10200 [2021-07-13 19:26:47,756 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2114601783, now seen corresponding path program 139 times [2021-07-13 19:26:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:47,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900549817] [2021-07-13 19:26:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:47,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900549817] [2021-07-13 19:26:47,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900549817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39279117] [2021-07-13 19:26:47,799 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 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 [2021-07-13 19:26:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:47,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:47,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:47,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39279117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:47,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:47,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:47,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929163647] [2021-07-13 19:26:47,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:47,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:47,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:47,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:47,856 INFO L87 Difference]: Start difference. First operand 421 states and 1284 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:47,920 INFO L93 Difference]: Finished difference Result 597 states and 1562 transitions. [2021-07-13 19:26:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:47,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:47,921 INFO L225 Difference]: With dead ends: 597 [2021-07-13 19:26:47,921 INFO L226 Difference]: Without dead ends: 597 [2021-07-13 19:26:47,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:47,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-13 19:26:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 407. [2021-07-13 19:26:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.0320197044334973) internal successors, (1231), 406 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1231 transitions. [2021-07-13 19:26:47,926 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1231 transitions. Word has length 19 [2021-07-13 19:26:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:47,926 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1231 transitions. [2021-07-13 19:26:47,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1231 transitions. [2021-07-13 19:26:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:47,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:47,927 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:48,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10201 [2021-07-13 19:26:48,127 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1564318246, now seen corresponding path program 140 times [2021-07-13 19:26:48,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:48,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436417732] [2021-07-13 19:26:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:48,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:48,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436417732] [2021-07-13 19:26:48,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436417732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:48,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382528861] [2021-07-13 19:26:48,170 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 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 [2021-07-13 19:26:48,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:48,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:48,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:48,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382528861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:48,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:48,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:48,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425054323] [2021-07-13 19:26:48,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:48,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:48,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:48,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:48,223 INFO L87 Difference]: Start difference. First operand 407 states and 1231 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:48,329 INFO L93 Difference]: Finished difference Result 489 states and 1403 transitions. [2021-07-13 19:26:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:48,330 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:26:48,330 INFO L226 Difference]: Without dead ends: 485 [2021-07-13 19:26:48,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-13 19:26:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 418. [2021-07-13 19:26:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.0239808153477217) internal successors, (1261), 417 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1261 transitions. [2021-07-13 19:26:48,335 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1261 transitions. Word has length 19 [2021-07-13 19:26:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:48,335 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1261 transitions. [2021-07-13 19:26:48,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1261 transitions. [2021-07-13 19:26:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:48,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:48,336 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:48,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10202,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:48,537 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 672996615, now seen corresponding path program 141 times [2021-07-13 19:26:48,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:48,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197781632] [2021-07-13 19:26:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:48,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:48,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197781632] [2021-07-13 19:26:48,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197781632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:48,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114914088] [2021-07-13 19:26:48,599 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 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 [2021-07-13 19:26:48,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:48,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:48,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:48,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114914088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:48,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:48,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:48,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120899312] [2021-07-13 19:26:48,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:48,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:48,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:48,666 INFO L87 Difference]: Start difference. First operand 418 states and 1261 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:48,736 INFO L93 Difference]: Finished difference Result 636 states and 1639 transitions. [2021-07-13 19:26:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:48,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:48,737 INFO L225 Difference]: With dead ends: 636 [2021-07-13 19:26:48,737 INFO L226 Difference]: Without dead ends: 636 [2021-07-13 19:26:48,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-13 19:26:48,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 405. [2021-07-13 19:26:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 3.0024752475247523) internal successors, (1213), 404 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1213 transitions. [2021-07-13 19:26:48,742 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1213 transitions. Word has length 19 [2021-07-13 19:26:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:48,743 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1213 transitions. [2021-07-13 19:26:48,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1213 transitions. [2021-07-13 19:26:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:48,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:48,743 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:48,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10203 [2021-07-13 19:26:48,944 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:48,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:48,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1786709960, now seen corresponding path program 142 times [2021-07-13 19:26:48,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:48,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671717310] [2021-07-13 19:26:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:48,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671717310] [2021-07-13 19:26:48,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671717310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:48,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365615128] [2021-07-13 19:26:48,991 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 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 [2021-07-13 19:26:49,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:49,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365615128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:49,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:49,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:49,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423829550] [2021-07-13 19:26:49,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:49,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:49,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:49,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:49,044 INFO L87 Difference]: Start difference. First operand 405 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:49,134 INFO L93 Difference]: Finished difference Result 488 states and 1377 transitions. [2021-07-13 19:26:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:49,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:49,135 INFO L225 Difference]: With dead ends: 488 [2021-07-13 19:26:49,135 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:26:49,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:26:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:26:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 409. [2021-07-13 19:26:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.9901960784313726) internal successors, (1220), 408 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1220 transitions. [2021-07-13 19:26:49,139 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1220 transitions. Word has length 19 [2021-07-13 19:26:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:49,139 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1220 transitions. [2021-07-13 19:26:49,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1220 transitions. [2021-07-13 19:26:49,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:49,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:49,140 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:49,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10204,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:49,342 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1067090633, now seen corresponding path program 143 times [2021-07-13 19:26:49,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:49,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072712862] [2021-07-13 19:26:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:49,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:49,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072712862] [2021-07-13 19:26:49,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072712862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:49,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146057755] [2021-07-13 19:26:49,394 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 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 [2021-07-13 19:26:49,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:49,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:49,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146057755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:49,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:49,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:26:49,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095511441] [2021-07-13 19:26:49,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:49,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:49,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:49,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:49,453 INFO L87 Difference]: Start difference. First operand 409 states and 1220 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:49,549 INFO L93 Difference]: Finished difference Result 668 states and 1705 transitions. [2021-07-13 19:26:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:26:49,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:49,550 INFO L225 Difference]: With dead ends: 668 [2021-07-13 19:26:49,550 INFO L226 Difference]: Without dead ends: 668 [2021-07-13 19:26:49,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:26:49,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-13 19:26:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 429. [2021-07-13 19:26:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.0163551401869158) internal successors, (1291), 428 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1291 transitions. [2021-07-13 19:26:49,556 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1291 transitions. Word has length 19 [2021-07-13 19:26:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:49,556 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1291 transitions. [2021-07-13 19:26:49,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1291 transitions. [2021-07-13 19:26:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:49,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:49,556 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:49,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10205 [2021-07-13 19:26:49,757 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:49,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:49,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1705598054, now seen corresponding path program 144 times [2021-07-13 19:26:49,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:49,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942412341] [2021-07-13 19:26:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:49,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:49,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942412341] [2021-07-13 19:26:49,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942412341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:49,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831069646] [2021-07-13 19:26:49,804 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 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 [2021-07-13 19:26:49,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:26:49,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:49,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:49,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:49,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831069646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:49,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:49,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:26:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967641851] [2021-07-13 19:26:49,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:49,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:49,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:49,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:49,854 INFO L87 Difference]: Start difference. First operand 429 states and 1291 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:49,936 INFO L93 Difference]: Finished difference Result 521 states and 1480 transitions. [2021-07-13 19:26:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:49,937 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:26:49,937 INFO L226 Difference]: Without dead ends: 513 [2021-07-13 19:26:49,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-07-13 19:26:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 427. [2021-07-13 19:26:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-07-13 19:26:49,942 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-07-13 19:26:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:49,942 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-07-13 19:26:49,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-07-13 19:26:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:49,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:49,943 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:50,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10206,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:50,144 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash 824779527, now seen corresponding path program 145 times [2021-07-13 19:26:50,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:50,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084163158] [2021-07-13 19:26:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:50,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:50,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084163158] [2021-07-13 19:26:50,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084163158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552838791] [2021-07-13 19:26:50,191 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 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 [2021-07-13 19:26:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:50,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:50,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552838791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:50,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:26:50,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72299948] [2021-07-13 19:26:50,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:50,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:50,242 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:50,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:50,373 INFO L93 Difference]: Finished difference Result 690 states and 1758 transitions. [2021-07-13 19:26:50,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:50,373 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:50,374 INFO L225 Difference]: With dead ends: 690 [2021-07-13 19:26:50,374 INFO L226 Difference]: Without dead ends: 690 [2021-07-13 19:26:50,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-07-13 19:26:50,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 427. [2021-07-13 19:26:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0211267605633805) internal successors, (1287), 426 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1287 transitions. [2021-07-13 19:26:50,380 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1287 transitions. Word has length 19 [2021-07-13 19:26:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:50,380 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1287 transitions. [2021-07-13 19:26:50,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1287 transitions. [2021-07-13 19:26:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:50,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:50,381 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:50,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10207 [2021-07-13 19:26:50,581 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1044035814, now seen corresponding path program 146 times [2021-07-13 19:26:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:50,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763621786] [2021-07-13 19:26:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:50,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:50,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763621786] [2021-07-13 19:26:50,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763621786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42920372] [2021-07-13 19:26:50,615 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 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 [2021-07-13 19:26:50,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:50,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:26:50,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42920372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:50,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:26:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56699815] [2021-07-13 19:26:50,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:50,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:50,668 INFO L87 Difference]: Start difference. First operand 427 states and 1287 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:50,722 INFO L93 Difference]: Finished difference Result 587 states and 1642 transitions. [2021-07-13 19:26:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:26:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:50,723 INFO L225 Difference]: With dead ends: 587 [2021-07-13 19:26:50,723 INFO L226 Difference]: Without dead ends: 587 [2021-07-13 19:26:50,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-07-13 19:26:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 451. [2021-07-13 19:26:50,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 3.0644444444444443) internal successors, (1379), 450 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1379 transitions. [2021-07-13 19:26:50,729 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1379 transitions. Word has length 19 [2021-07-13 19:26:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:50,729 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1379 transitions. [2021-07-13 19:26:50,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1379 transitions. [2021-07-13 19:26:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:50,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:50,730 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:50,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10208,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:50,930 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:50,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1821185413, now seen corresponding path program 147 times [2021-07-13 19:26:50,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:50,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385877235] [2021-07-13 19:26:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:50,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385877235] [2021-07-13 19:26:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385877235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274308731] [2021-07-13 19:26:50,958 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 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 [2021-07-13 19:26:50,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:50,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:26:51,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274308731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:51,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:51,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:26:51,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147229863] [2021-07-13 19:26:51,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:26:51,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:26:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:26:51,007 INFO L87 Difference]: Start difference. First operand 451 states and 1379 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:51,088 INFO L93 Difference]: Finished difference Result 581 states and 1594 transitions. [2021-07-13 19:26:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:26:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:51,089 INFO L225 Difference]: With dead ends: 581 [2021-07-13 19:26:51,089 INFO L226 Difference]: Without dead ends: 579 [2021-07-13 19:26:51,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-13 19:26:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 466. [2021-07-13 19:26:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0709677419354837) internal successors, (1428), 465 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1428 transitions. [2021-07-13 19:26:51,095 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1428 transitions. Word has length 19 [2021-07-13 19:26:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:51,095 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1428 transitions. [2021-07-13 19:26:51,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1428 transitions. [2021-07-13 19:26:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:51,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:51,095 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:51,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10209 [2021-07-13 19:26:51,296 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:51,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2123535389, now seen corresponding path program 148 times [2021-07-13 19:26:51,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:51,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305018876] [2021-07-13 19:26:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:51,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:51,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305018876] [2021-07-13 19:26:51,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305018876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:51,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669863714] [2021-07-13 19:26:51,328 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 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 [2021-07-13 19:26:51,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:51,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:51,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669863714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:51,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:51,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:51,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938185926] [2021-07-13 19:26:51,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:51,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:51,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:51,381 INFO L87 Difference]: Start difference. First operand 466 states and 1428 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:51,433 INFO L93 Difference]: Finished difference Result 595 states and 1618 transitions. [2021-07-13 19:26:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:26:51,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-13 19:26:51,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:51,434 INFO L225 Difference]: With dead ends: 595 [2021-07-13 19:26:51,434 INFO L226 Difference]: Without dead ends: 595 [2021-07-13 19:26:51,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-07-13 19:26:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 465. [2021-07-13 19:26:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-07-13 19:26:51,440 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-07-13 19:26:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:51,440 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-07-13 19:26:51,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-07-13 19:26:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:51,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:51,441 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:51,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10210,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:51,649 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:51,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1633576329, now seen corresponding path program 149 times [2021-07-13 19:26:51,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:51,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169026814] [2021-07-13 19:26:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:51,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:51,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169026814] [2021-07-13 19:26:51,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169026814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:51,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102885635] [2021-07-13 19:26:51,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:51,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:26:51,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:51,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102885635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:51,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:51,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:51,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646404280] [2021-07-13 19:26:51,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:51,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:51,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:51,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:51,740 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:51,815 INFO L93 Difference]: Finished difference Result 631 states and 1678 transitions. [2021-07-13 19:26:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:26:51,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:51,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:51,817 INFO L225 Difference]: With dead ends: 631 [2021-07-13 19:26:51,817 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 19:26:51,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:26:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 19:26:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 465. [2021-07-13 19:26:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 3.0689655172413794) internal successors, (1424), 464 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1424 transitions. [2021-07-13 19:26:51,822 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1424 transitions. Word has length 19 [2021-07-13 19:26:51,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:51,822 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1424 transitions. [2021-07-13 19:26:51,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1424 transitions. [2021-07-13 19:26:51,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:51,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:51,823 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:52,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10211 [2021-07-13 19:26:52,023 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1259104068, now seen corresponding path program 150 times [2021-07-13 19:26:52,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:52,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643262792] [2021-07-13 19:26:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643262792] [2021-07-13 19:26:52,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643262792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150104991] [2021-07-13 19:26:52,068 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 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 [2021-07-13 19:26:52,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:52,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150104991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:52,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:26:52,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572867831] [2021-07-13 19:26:52,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:52,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:52,117 INFO L87 Difference]: Start difference. First operand 465 states and 1424 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:52,226 INFO L93 Difference]: Finished difference Result 578 states and 1659 transitions. [2021-07-13 19:26:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:52,227 INFO L225 Difference]: With dead ends: 578 [2021-07-13 19:26:52,227 INFO L226 Difference]: Without dead ends: 570 [2021-07-13 19:26:52,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:26:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-13 19:26:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 469. [2021-07-13 19:26:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-07-13 19:26:52,233 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-07-13 19:26:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:52,233 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-07-13 19:26:52,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-07-13 19:26:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:52,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:52,234 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:52,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10212 [2021-07-13 19:26:52,435 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:52,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:52,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2139922595, now seen corresponding path program 151 times [2021-07-13 19:26:52,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:52,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318087860] [2021-07-13 19:26:52,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:52,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318087860] [2021-07-13 19:26:52,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318087860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062820348] [2021-07-13 19:26:52,484 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 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 [2021-07-13 19:26:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062820348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:52,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:26:52,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252216291] [2021-07-13 19:26:52,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:52,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:52,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:52,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:52,545 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:52,669 INFO L93 Difference]: Finished difference Result 678 states and 1771 transitions. [2021-07-13 19:26:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:26:52,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:52,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:52,670 INFO L225 Difference]: With dead ends: 678 [2021-07-13 19:26:52,670 INFO L226 Difference]: Without dead ends: 678 [2021-07-13 19:26:52,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:26:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-13 19:26:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 469. [2021-07-13 19:26:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0619658119658117) internal successors, (1433), 468 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1433 transitions. [2021-07-13 19:26:52,676 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1433 transitions. Word has length 19 [2021-07-13 19:26:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:52,676 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1433 transitions. [2021-07-13 19:26:52,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:52,676 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1433 transitions. [2021-07-13 19:26:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:52,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:52,677 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:52,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10213 [2021-07-13 19:26:52,877 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1702003208, now seen corresponding path program 152 times [2021-07-13 19:26:52,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:52,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404435924] [2021-07-13 19:26:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:52,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404435924] [2021-07-13 19:26:52,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404435924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304293480] [2021-07-13 19:26:52,925 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 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 [2021-07-13 19:26:52,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:52,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:52,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304293480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:52,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:52,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:52,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285220553] [2021-07-13 19:26:52,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:52,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:52,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:52,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:52,978 INFO L87 Difference]: Start difference. First operand 469 states and 1433 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:53,099 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-07-13 19:26:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:53,100 INFO L225 Difference]: With dead ends: 606 [2021-07-13 19:26:53,100 INFO L226 Difference]: Without dead ends: 596 [2021-07-13 19:26:53,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-07-13 19:26:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 477. [2021-07-13 19:26:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.03781512605042) internal successors, (1446), 476 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1446 transitions. [2021-07-13 19:26:53,106 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1446 transitions. Word has length 19 [2021-07-13 19:26:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:53,106 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1446 transitions. [2021-07-13 19:26:53,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1446 transitions. [2021-07-13 19:26:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:53,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:53,107 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:53,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10214,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:53,307 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:53,308 INFO L82 PathProgramCache]: Analyzing trace with hash -656787657, now seen corresponding path program 153 times [2021-07-13 19:26:53,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:53,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639175209] [2021-07-13 19:26:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:53,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:53,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639175209] [2021-07-13 19:26:53,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639175209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:53,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8555624] [2021-07-13 19:26:53,352 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 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 [2021-07-13 19:26:53,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:53,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:53,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8555624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:53,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:53,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:53,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433834459] [2021-07-13 19:26:53,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:53,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:53,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:53,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:53,412 INFO L87 Difference]: Start difference. First operand 477 states and 1446 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:53,591 INFO L93 Difference]: Finished difference Result 741 states and 1915 transitions. [2021-07-13 19:26:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:26:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:53,593 INFO L225 Difference]: With dead ends: 741 [2021-07-13 19:26:53,593 INFO L226 Difference]: Without dead ends: 741 [2021-07-13 19:26:53,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:26:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-07-13 19:26:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 466. [2021-07-13 19:26:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0279569892473117) internal successors, (1408), 465 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1408 transitions. [2021-07-13 19:26:53,599 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1408 transitions. Word has length 19 [2021-07-13 19:26:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:53,599 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1408 transitions. [2021-07-13 19:26:53,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1408 transitions. [2021-07-13 19:26:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:53,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:53,600 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:53,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10215 [2021-07-13 19:26:53,800 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1539478916, now seen corresponding path program 154 times [2021-07-13 19:26:53,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:53,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670008395] [2021-07-13 19:26:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:53,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:53,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670008395] [2021-07-13 19:26:53,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670008395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:53,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572198981] [2021-07-13 19:26:53,834 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 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 [2021-07-13 19:26:53,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:53,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:53,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:53,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572198981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:53,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:53,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:53,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141234124] [2021-07-13 19:26:53,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:53,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:53,887 INFO L87 Difference]: Start difference. First operand 466 states and 1408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:53,954 INFO L93 Difference]: Finished difference Result 658 states and 1841 transitions. [2021-07-13 19:26:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:26:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-13 19:26:53,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:53,955 INFO L225 Difference]: With dead ends: 658 [2021-07-13 19:26:53,955 INFO L226 Difference]: Without dead ends: 658 [2021-07-13 19:26:53,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-07-13 19:26:53,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 506. [2021-07-13 19:26:53,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.091089108910891) internal successors, (1561), 505 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1561 transitions. [2021-07-13 19:26:53,962 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1561 transitions. Word has length 19 [2021-07-13 19:26:53,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:53,962 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1561 transitions. [2021-07-13 19:26:53,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:53,962 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1561 transitions. [2021-07-13 19:26:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:53,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:53,963 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:54,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10216,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:54,163 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash 762329317, now seen corresponding path program 155 times [2021-07-13 19:26:54,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:54,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66937068] [2021-07-13 19:26:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:54,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66937068] [2021-07-13 19:26:54,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66937068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763837737] [2021-07-13 19:26:54,199 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:54,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:54,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:54,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:54,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763837737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:54,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:54,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323377862] [2021-07-13 19:26:54,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:54,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:54,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:54,247 INFO L87 Difference]: Start difference. First operand 506 states and 1561 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:54,340 INFO L93 Difference]: Finished difference Result 668 states and 1844 transitions. [2021-07-13 19:26:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-13 19:26:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:54,341 INFO L225 Difference]: With dead ends: 668 [2021-07-13 19:26:54,341 INFO L226 Difference]: Without dead ends: 666 [2021-07-13 19:26:54,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-13 19:26:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 524. [2021-07-13 19:26:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.108986615678776) internal successors, (1626), 523 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1626 transitions. [2021-07-13 19:26:54,348 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1626 transitions. Word has length 19 [2021-07-13 19:26:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:54,348 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1626 transitions. [2021-07-13 19:26:54,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1626 transitions. [2021-07-13 19:26:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:54,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:54,349 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:54,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10217 [2021-07-13 19:26:54,549 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:54,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:54,549 INFO L82 PathProgramCache]: Analyzing trace with hash -186000542, now seen corresponding path program 156 times [2021-07-13 19:26:54,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:54,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754121970] [2021-07-13 19:26:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:54,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:54,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754121970] [2021-07-13 19:26:54,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754121970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138027480] [2021-07-13 19:26:54,582 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 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 [2021-07-13 19:26:54,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:26:54,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138027480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:54,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439913320] [2021-07-13 19:26:54,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:54,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:54,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:54,634 INFO L87 Difference]: Start difference. First operand 524 states and 1626 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:54,722 INFO L93 Difference]: Finished difference Result 664 states and 1886 transitions. [2021-07-13 19:26:54,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:26:54,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-13 19:26:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:54,723 INFO L225 Difference]: With dead ends: 664 [2021-07-13 19:26:54,723 INFO L226 Difference]: Without dead ends: 662 [2021-07-13 19:26:54,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:54,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-07-13 19:26:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 524. [2021-07-13 19:26:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.107074569789675) internal successors, (1625), 523 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1625 transitions. [2021-07-13 19:26:54,729 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1625 transitions. Word has length 19 [2021-07-13 19:26:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:54,729 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1625 transitions. [2021-07-13 19:26:54,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1625 transitions. [2021-07-13 19:26:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:54,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:54,730 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:54,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10218,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:54,931 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1822024671, now seen corresponding path program 157 times [2021-07-13 19:26:54,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:54,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884631505] [2021-07-13 19:26:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:54,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884631505] [2021-07-13 19:26:54,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884631505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709548502] [2021-07-13 19:26:54,962 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 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 [2021-07-13 19:26:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:54,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:26:55,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709548502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:55,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:55,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:26:55,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731972105] [2021-07-13 19:26:55,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:26:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:26:55,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:26:55,014 INFO L87 Difference]: Start difference. First operand 524 states and 1625 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:55,064 INFO L93 Difference]: Finished difference Result 657 states and 1827 transitions. [2021-07-13 19:26:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:26:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 19 [2021-07-13 19:26:55,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:55,065 INFO L225 Difference]: With dead ends: 657 [2021-07-13 19:26:55,065 INFO L226 Difference]: Without dead ends: 657 [2021-07-13 19:26:55,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:55,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-07-13 19:26:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 524. [2021-07-13 19:26:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1032504780114722) internal successors, (1623), 523 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1623 transitions. [2021-07-13 19:26:55,072 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1623 transitions. Word has length 19 [2021-07-13 19:26:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:55,072 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1623 transitions. [2021-07-13 19:26:55,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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) [2021-07-13 19:26:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1623 transitions. [2021-07-13 19:26:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:55,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:55,073 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:55,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10219 [2021-07-13 19:26:55,289 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:55,289 INFO L82 PathProgramCache]: Analyzing trace with hash 949938401, now seen corresponding path program 158 times [2021-07-13 19:26:55,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:55,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271134747] [2021-07-13 19:26:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:55,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:55,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271134747] [2021-07-13 19:26:55,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271134747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:55,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941742351] [2021-07-13 19:26:55,325 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 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 [2021-07-13 19:26:55,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:55,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:55,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:55,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:55,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941742351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:55,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:55,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:55,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172853262] [2021-07-13 19:26:55,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:55,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:55,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:55,377 INFO L87 Difference]: Start difference. First operand 524 states and 1623 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:55,448 INFO L93 Difference]: Finished difference Result 654 states and 1817 transitions. [2021-07-13 19:26:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:55,449 INFO L225 Difference]: With dead ends: 654 [2021-07-13 19:26:55,449 INFO L226 Difference]: Without dead ends: 654 [2021-07-13 19:26:55,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-07-13 19:26:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 521. [2021-07-13 19:26:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 3.098076923076923) internal successors, (1611), 520 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1611 transitions. [2021-07-13 19:26:55,455 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1611 transitions. Word has length 19 [2021-07-13 19:26:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:55,455 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1611 transitions. [2021-07-13 19:26:55,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1611 transitions. [2021-07-13 19:26:55,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:55,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:55,456 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:55,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10220,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:55,657 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1324410662, now seen corresponding path program 159 times [2021-07-13 19:26:55,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:55,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298447566] [2021-07-13 19:26:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:55,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:55,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298447566] [2021-07-13 19:26:55,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298447566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:55,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558136141] [2021-07-13 19:26:55,700 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 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 [2021-07-13 19:26:55,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:55,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:55,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:55,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:55,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558136141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:55,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:55,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:26:55,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453376173] [2021-07-13 19:26:55,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:55,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:55,751 INFO L87 Difference]: Start difference. First operand 521 states and 1611 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:55,861 INFO L93 Difference]: Finished difference Result 678 states and 1970 transitions. [2021-07-13 19:26:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:26:55,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:55,862 INFO L225 Difference]: With dead ends: 678 [2021-07-13 19:26:55,862 INFO L226 Difference]: Without dead ends: 670 [2021-07-13 19:26:55,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:26:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-07-13 19:26:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 544. [2021-07-13 19:26:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.1270718232044197) internal successors, (1698), 543 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1698 transitions. [2021-07-13 19:26:55,869 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1698 transitions. Word has length 19 [2021-07-13 19:26:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:55,869 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1698 transitions. [2021-07-13 19:26:55,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1698 transitions. [2021-07-13 19:26:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:55,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:55,870 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:56,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10221 [2021-07-13 19:26:56,071 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:56,071 INFO L82 PathProgramCache]: Analyzing trace with hash 443592135, now seen corresponding path program 160 times [2021-07-13 19:26:56,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:56,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759254660] [2021-07-13 19:26:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:56,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759254660] [2021-07-13 19:26:56,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759254660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918307971] [2021-07-13 19:26:56,114 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 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 [2021-07-13 19:26:56,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:56,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:56,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918307971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:56,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:26:56,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893672946] [2021-07-13 19:26:56,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:56,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:56,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:56,170 INFO L87 Difference]: Start difference. First operand 544 states and 1698 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:56,285 INFO L93 Difference]: Finished difference Result 717 states and 1973 transitions. [2021-07-13 19:26:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:26:56,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:56,287 INFO L225 Difference]: With dead ends: 717 [2021-07-13 19:26:56,287 INFO L226 Difference]: Without dead ends: 717 [2021-07-13 19:26:56,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:26:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-13 19:26:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 548. [2021-07-13 19:26:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.126142595978062) internal successors, (1710), 547 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1710 transitions. [2021-07-13 19:26:56,293 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1710 transitions. Word has length 19 [2021-07-13 19:26:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:56,293 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1710 transitions. [2021-07-13 19:26:56,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1710 transitions. [2021-07-13 19:26:56,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:56,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:56,294 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:56,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10222 [2021-07-13 19:26:56,494 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:56,495 INFO L82 PathProgramCache]: Analyzing trace with hash 881511522, now seen corresponding path program 161 times [2021-07-13 19:26:56,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:56,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350328538] [2021-07-13 19:26:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:56,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350328538] [2021-07-13 19:26:56,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350328538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386085910] [2021-07-13 19:26:56,540 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 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 [2021-07-13 19:26:56,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:56,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:56,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386085910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:56,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:56,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:56,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080944130] [2021-07-13 19:26:56,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:56,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:56,618 INFO L87 Difference]: Start difference. First operand 548 states and 1710 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:56,743 INFO L93 Difference]: Finished difference Result 704 states and 2024 transitions. [2021-07-13 19:26:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:56,744 INFO L225 Difference]: With dead ends: 704 [2021-07-13 19:26:56,744 INFO L226 Difference]: Without dead ends: 694 [2021-07-13 19:26:56,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:26:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-07-13 19:26:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 548. [2021-07-13 19:26:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.1243144424131626) internal successors, (1709), 547 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1709 transitions. [2021-07-13 19:26:56,752 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1709 transitions. Word has length 19 [2021-07-13 19:26:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:56,752 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1709 transitions. [2021-07-13 19:26:56,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1709 transitions. [2021-07-13 19:26:56,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:56,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:56,753 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:56,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10223 [2021-07-13 19:26:56,964 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:56,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1926727073, now seen corresponding path program 162 times [2021-07-13 19:26:56,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:56,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529669974] [2021-07-13 19:26:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:57,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:57,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529669974] [2021-07-13 19:26:57,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529669974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:57,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648112910] [2021-07-13 19:26:57,007 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 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 [2021-07-13 19:26:57,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:26:57,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:57,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:57,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648112910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:57,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:57,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567758071] [2021-07-13 19:26:57,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:57,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:57,065 INFO L87 Difference]: Start difference. First operand 548 states and 1709 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:57,240 INFO L93 Difference]: Finished difference Result 763 states and 2067 transitions. [2021-07-13 19:26:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:26:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:57,242 INFO L225 Difference]: With dead ends: 763 [2021-07-13 19:26:57,242 INFO L226 Difference]: Without dead ends: 763 [2021-07-13 19:26:57,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:26:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-07-13 19:26:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 531. [2021-07-13 19:26:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1245283018867926) internal successors, (1656), 530 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1656 transitions. [2021-07-13 19:26:57,248 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1656 transitions. Word has length 19 [2021-07-13 19:26:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:57,248 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1656 transitions. [2021-07-13 19:26:57,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1656 transitions. [2021-07-13 19:26:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:57,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:57,249 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:57,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10224 [2021-07-13 19:26:57,449 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash 36540070, now seen corresponding path program 163 times [2021-07-13 19:26:57,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:57,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031355957] [2021-07-13 19:26:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:57,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:57,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031355957] [2021-07-13 19:26:57,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031355957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:57,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768393750] [2021-07-13 19:26:57,507 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 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 [2021-07-13 19:26:57,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:57,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:57,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768393750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:57,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:57,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:57,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801040161] [2021-07-13 19:26:57,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:57,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:57,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:57,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:57,562 INFO L87 Difference]: Start difference. First operand 531 states and 1656 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:57,618 INFO L93 Difference]: Finished difference Result 610 states and 1818 transitions. [2021-07-13 19:26:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:26:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:57,619 INFO L225 Difference]: With dead ends: 610 [2021-07-13 19:26:57,619 INFO L226 Difference]: Without dead ends: 598 [2021-07-13 19:26:57,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-07-13 19:26:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 531. [2021-07-13 19:26:57,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.1226415094339623) internal successors, (1655), 530 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1655 transitions. [2021-07-13 19:26:57,625 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1655 transitions. Word has length 19 [2021-07-13 19:26:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:57,625 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1655 transitions. [2021-07-13 19:26:57,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1655 transitions. [2021-07-13 19:26:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:57,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:57,626 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:57,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10225,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:57,827 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:57,827 INFO L82 PathProgramCache]: Analyzing trace with hash 659269895, now seen corresponding path program 164 times [2021-07-13 19:26:57,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:57,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869688896] [2021-07-13 19:26:57,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:57,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:57,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869688896] [2021-07-13 19:26:57,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869688896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:57,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676413306] [2021-07-13 19:26:57,873 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 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 [2021-07-13 19:26:57,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:57,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:57,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676413306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:57,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:57,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:26:57,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583455459] [2021-07-13 19:26:57,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:57,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:57,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:57,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:57,931 INFO L87 Difference]: Start difference. First operand 531 states and 1655 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:58,129 INFO L93 Difference]: Finished difference Result 855 states and 2351 transitions. [2021-07-13 19:26:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:26:58,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:58,130 INFO L225 Difference]: With dead ends: 855 [2021-07-13 19:26:58,130 INFO L226 Difference]: Without dead ends: 855 [2021-07-13 19:26:58,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:26:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-07-13 19:26:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 577. [2021-07-13 19:26:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1180555555555554) internal successors, (1796), 576 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1796 transitions. [2021-07-13 19:26:58,138 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1796 transitions. Word has length 19 [2021-07-13 19:26:58,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:58,138 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1796 transitions. [2021-07-13 19:26:58,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1796 transitions. [2021-07-13 19:26:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:58,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:58,139 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:58,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10226 [2021-07-13 19:26:58,339 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash 24056922, now seen corresponding path program 165 times [2021-07-13 19:26:58,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:58,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103760086] [2021-07-13 19:26:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103760086] [2021-07-13 19:26:58,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103760086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88558603] [2021-07-13 19:26:58,376 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 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 [2021-07-13 19:26:58,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:58,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:58,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:58,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88558603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:58,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:58,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502427440] [2021-07-13 19:26:58,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:58,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:58,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:58,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:58,430 INFO L87 Difference]: Start difference. First operand 577 states and 1796 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:58,487 INFO L93 Difference]: Finished difference Result 817 states and 2337 transitions. [2021-07-13 19:26:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:26:58,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:58,489 INFO L225 Difference]: With dead ends: 817 [2021-07-13 19:26:58,489 INFO L226 Difference]: Without dead ends: 817 [2021-07-13 19:26:58,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-07-13 19:26:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 632. [2021-07-13 19:26:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.172741679873217) internal successors, (2002), 631 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2002 transitions. [2021-07-13 19:26:58,497 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2002 transitions. Word has length 19 [2021-07-13 19:26:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:58,497 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2002 transitions. [2021-07-13 19:26:58,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2002 transitions. [2021-07-13 19:26:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:58,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:58,498 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:58,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10227,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:58,713 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash -753092677, now seen corresponding path program 166 times [2021-07-13 19:26:58,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:58,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705711362] [2021-07-13 19:26:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:58,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:58,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705711362] [2021-07-13 19:26:58,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705711362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960006796] [2021-07-13 19:26:58,749 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 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 [2021-07-13 19:26:58,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:58,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:58,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960006796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:58,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:58,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:58,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665024515] [2021-07-13 19:26:58,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:58,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:58,797 INFO L87 Difference]: Start difference. First operand 632 states and 2002 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:58,909 INFO L93 Difference]: Finished difference Result 820 states and 2329 transitions. [2021-07-13 19:26:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:58,911 INFO L225 Difference]: With dead ends: 820 [2021-07-13 19:26:58,911 INFO L226 Difference]: Without dead ends: 818 [2021-07-13 19:26:58,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:26:58,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-07-13 19:26:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 649. [2021-07-13 19:26:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 3.1882716049382718) internal successors, (2066), 648 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2066 transitions. [2021-07-13 19:26:58,923 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2066 transitions. Word has length 19 [2021-07-13 19:26:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:58,923 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 2066 transitions. [2021-07-13 19:26:58,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2066 transitions. [2021-07-13 19:26:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:58,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:58,924 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:59,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10228,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:59,125 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1701422536, now seen corresponding path program 167 times [2021-07-13 19:26:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:59,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691510354] [2021-07-13 19:26:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:59,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691510354] [2021-07-13 19:26:59,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691510354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429850258] [2021-07-13 19:26:59,162 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 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 [2021-07-13 19:26:59,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:26:59,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:59,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:59,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429850258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:59,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:59,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:59,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317825879] [2021-07-13 19:26:59,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:59,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:59,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:59,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:59,211 INFO L87 Difference]: Start difference. First operand 649 states and 2066 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:59,311 INFO L93 Difference]: Finished difference Result 822 states and 2381 transitions. [2021-07-13 19:26:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:26:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:59,313 INFO L225 Difference]: With dead ends: 822 [2021-07-13 19:26:59,313 INFO L226 Difference]: Without dead ends: 820 [2021-07-13 19:26:59,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:26:59,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-13 19:26:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 629. [2021-07-13 19:26:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.1640127388535033) internal successors, (1987), 628 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1987 transitions. [2021-07-13 19:26:59,321 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1987 transitions. Word has length 19 [2021-07-13 19:26:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:59,321 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1987 transitions. [2021-07-13 19:26:59,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1987 transitions. [2021-07-13 19:26:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:59,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:59,322 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:59,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10229,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:59,523 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash 957520631, now seen corresponding path program 168 times [2021-07-13 19:26:59,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:59,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563973073] [2021-07-13 19:26:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:59,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:59,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563973073] [2021-07-13 19:26:59,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563973073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:59,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447908224] [2021-07-13 19:26:59,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:26:59,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:26:59,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:59,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:59,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447908224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:59,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:59,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:59,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129133345] [2021-07-13 19:26:59,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:59,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:59,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:59,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:59,618 INFO L87 Difference]: Start difference. First operand 629 states and 1987 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:59,678 INFO L93 Difference]: Finished difference Result 797 states and 2254 transitions. [2021-07-13 19:26:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:26:59,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:26:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:59,680 INFO L225 Difference]: With dead ends: 797 [2021-07-13 19:26:59,680 INFO L226 Difference]: Without dead ends: 797 [2021-07-13 19:26:59,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-07-13 19:26:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 610. [2021-07-13 19:26:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.147783251231527) internal successors, (1917), 609 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1917 transitions. [2021-07-13 19:26:59,688 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1917 transitions. Word has length 19 [2021-07-13 19:26:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:59,688 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1917 transitions. [2021-07-13 19:26:59,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1917 transitions. [2021-07-13 19:26:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:26:59,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:59,689 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:59,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10230,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:59,889 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -212017540, now seen corresponding path program 169 times [2021-07-13 19:26:59,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:59,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189797467] [2021-07-13 19:26:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:59,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:59,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189797467] [2021-07-13 19:26:59,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189797467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:59,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859121587] [2021-07-13 19:26:59,926 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 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 [2021-07-13 19:26:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:59,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:26:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:59,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859121587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:59,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:59,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:26:59,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417154580] [2021-07-13 19:26:59,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:26:59,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:59,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:26:59,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:26:59,975 INFO L87 Difference]: Start difference. First operand 610 states and 1917 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:00,076 INFO L93 Difference]: Finished difference Result 795 states and 2316 transitions. [2021-07-13 19:27:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:27:00,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:00,078 INFO L225 Difference]: With dead ends: 795 [2021-07-13 19:27:00,078 INFO L226 Difference]: Without dead ends: 791 [2021-07-13 19:27:00,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:27:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-07-13 19:27:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 610. [2021-07-13 19:27:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.1461412151067325) internal successors, (1916), 609 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1916 transitions. [2021-07-13 19:27:00,086 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1916 transitions. Word has length 19 [2021-07-13 19:27:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:00,086 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1916 transitions. [2021-07-13 19:27:00,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,086 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1916 transitions. [2021-07-13 19:27:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:00,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:00,087 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:00,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10231 [2021-07-13 19:27:00,287 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:00,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1103339171, now seen corresponding path program 170 times [2021-07-13 19:27:00,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:00,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274799422] [2021-07-13 19:27:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274799422] [2021-07-13 19:27:00,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274799422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174783702] [2021-07-13 19:27:00,323 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 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 [2021-07-13 19:27:00,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:00,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:00,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:00,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174783702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:00,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:27:00,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691339983] [2021-07-13 19:27:00,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:27:00,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:00,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:27:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:27:00,377 INFO L87 Difference]: Start difference. First operand 610 states and 1916 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:00,442 INFO L93 Difference]: Finished difference Result 759 states and 2167 transitions. [2021-07-13 19:27:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:27:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:00,443 INFO L225 Difference]: With dead ends: 759 [2021-07-13 19:27:00,443 INFO L226 Difference]: Without dead ends: 759 [2021-07-13 19:27:00,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-07-13 19:27:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-07-13 19:27:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.134892086330935) internal successors, (1743), 556 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1743 transitions. [2021-07-13 19:27:00,450 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1743 transitions. Word has length 19 [2021-07-13 19:27:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:00,450 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1743 transitions. [2021-07-13 19:27:00,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1743 transitions. [2021-07-13 19:27:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:00,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:00,451 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:00,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10232 [2021-07-13 19:27:00,652 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash -191011332, now seen corresponding path program 171 times [2021-07-13 19:27:00,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:00,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40743067] [2021-07-13 19:27:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:00,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40743067] [2021-07-13 19:27:00,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40743067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765520374] [2021-07-13 19:27:00,696 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 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 [2021-07-13 19:27:00,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:27:00,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:00,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765520374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:00,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:00,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:00,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758673811] [2021-07-13 19:27:00,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:00,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:00,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:00,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:00,746 INFO L87 Difference]: Start difference. First operand 557 states and 1743 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:00,861 INFO L93 Difference]: Finished difference Result 713 states and 2090 transitions. [2021-07-13 19:27:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:27:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:00,862 INFO L225 Difference]: With dead ends: 713 [2021-07-13 19:27:00,862 INFO L226 Difference]: Without dead ends: 705 [2021-07-13 19:27:00,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-07-13 19:27:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 580. [2021-07-13 19:27:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.153713298791019) internal successors, (1826), 579 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1826 transitions. [2021-07-13 19:27:00,870 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1826 transitions. Word has length 19 [2021-07-13 19:27:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:00,870 INFO L482 AbstractCegarLoop]: Abstraction has 580 states and 1826 transitions. [2021-07-13 19:27:00,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1826 transitions. [2021-07-13 19:27:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:00,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:00,871 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:01,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10233 [2021-07-13 19:27:01,071 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1071829859, now seen corresponding path program 172 times [2021-07-13 19:27:01,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:01,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655868220] [2021-07-13 19:27:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:01,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:01,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655868220] [2021-07-13 19:27:01,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655868220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135833778] [2021-07-13 19:27:01,113 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 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 [2021-07-13 19:27:01,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:01,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:01,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:01,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135833778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:01,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:01,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286687650] [2021-07-13 19:27:01,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:01,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:01,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:01,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:01,166 INFO L87 Difference]: Start difference. First operand 580 states and 1826 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:01,262 INFO L93 Difference]: Finished difference Result 748 states and 2153 transitions. [2021-07-13 19:27:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:27:01,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:01,264 INFO L225 Difference]: With dead ends: 748 [2021-07-13 19:27:01,264 INFO L226 Difference]: Without dead ends: 748 [2021-07-13 19:27:01,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:27:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-07-13 19:27:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 605. [2021-07-13 19:27:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1506622516556293) internal successors, (1903), 604 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1903 transitions. [2021-07-13 19:27:01,271 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1903 transitions. Word has length 19 [2021-07-13 19:27:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:01,271 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1903 transitions. [2021-07-13 19:27:01,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1903 transitions. [2021-07-13 19:27:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:01,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:01,272 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:01,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10234 [2021-07-13 19:27:01,473 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash -633910472, now seen corresponding path program 173 times [2021-07-13 19:27:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:01,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45774337] [2021-07-13 19:27:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:01,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:01,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45774337] [2021-07-13 19:27:01,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45774337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761481689] [2021-07-13 19:27:01,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:01,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:27:01,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:01,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:01,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:01,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761481689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:01,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:01,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730540198] [2021-07-13 19:27:01,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:01,577 INFO L87 Difference]: Start difference. First operand 605 states and 1903 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:01,702 INFO L93 Difference]: Finished difference Result 772 states and 2234 transitions. [2021-07-13 19:27:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:01,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:01,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:01,703 INFO L225 Difference]: With dead ends: 772 [2021-07-13 19:27:01,704 INFO L226 Difference]: Without dead ends: 762 [2021-07-13 19:27:01,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:27:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-13 19:27:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-07-13 19:27:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 3.1490066225165565) internal successors, (1902), 604 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1902 transitions. [2021-07-13 19:27:01,711 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1902 transitions. Word has length 19 [2021-07-13 19:27:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:01,711 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1902 transitions. [2021-07-13 19:27:01,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1902 transitions. [2021-07-13 19:27:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:01,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:01,712 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:01,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10235,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:01,914 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:01,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:01,914 INFO L82 PathProgramCache]: Analyzing trace with hash 411305079, now seen corresponding path program 174 times [2021-07-13 19:27:01,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:01,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628116802] [2021-07-13 19:27:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:01,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:01,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628116802] [2021-07-13 19:27:01,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628116802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:01,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564647302] [2021-07-13 19:27:01,963 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 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 [2021-07-13 19:27:01,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:27:01,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564647302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:02,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993131678] [2021-07-13 19:27:02,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:02,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:02,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:02,022 INFO L87 Difference]: Start difference. First operand 605 states and 1902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:02,178 INFO L93 Difference]: Finished difference Result 764 states and 2153 transitions. [2021-07-13 19:27:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:27:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:02,179 INFO L225 Difference]: With dead ends: 764 [2021-07-13 19:27:02,179 INFO L226 Difference]: Without dead ends: 764 [2021-07-13 19:27:02,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-07-13 19:27:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 593. [2021-07-13 19:27:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.152027027027027) internal successors, (1866), 592 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1866 transitions. [2021-07-13 19:27:02,186 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1866 transitions. Word has length 19 [2021-07-13 19:27:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:02,186 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1866 transitions. [2021-07-13 19:27:02,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1866 transitions. [2021-07-13 19:27:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:02,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:02,187 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:02,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10236 [2021-07-13 19:27:02,389 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:02,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1478881924, now seen corresponding path program 175 times [2021-07-13 19:27:02,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:02,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672565654] [2021-07-13 19:27:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:02,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672565654] [2021-07-13 19:27:02,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672565654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448346564] [2021-07-13 19:27:02,441 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 [2021-07-13 19:27:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:02,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:02,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448346564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:02,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:02,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429326595] [2021-07-13 19:27:02,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:02,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:02,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:02,496 INFO L87 Difference]: Start difference. First operand 593 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:02,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:02,556 INFO L93 Difference]: Finished difference Result 677 states and 2039 transitions. [2021-07-13 19:27:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:27:02,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:02,557 INFO L225 Difference]: With dead ends: 677 [2021-07-13 19:27:02,557 INFO L226 Difference]: Without dead ends: 665 [2021-07-13 19:27:02,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-07-13 19:27:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 593. [2021-07-13 19:27:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1503378378378377) internal successors, (1865), 592 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1865 transitions. [2021-07-13 19:27:02,564 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1865 transitions. Word has length 19 [2021-07-13 19:27:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:02,564 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1865 transitions. [2021-07-13 19:27:02,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1865 transitions. [2021-07-13 19:27:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:02,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:02,565 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:02,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10237,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:02,781 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash -856152099, now seen corresponding path program 176 times [2021-07-13 19:27:02,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:02,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137143633] [2021-07-13 19:27:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137143633] [2021-07-13 19:27:02,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137143633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396520362] [2021-07-13 19:27:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:02,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:02,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:02,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:02,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396520362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:02,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:02,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:02,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434083501] [2021-07-13 19:27:02,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:02,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:02,884 INFO L87 Difference]: Start difference. First operand 593 states and 1865 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:03,057 INFO L93 Difference]: Finished difference Result 742 states and 2108 transitions. [2021-07-13 19:27:03,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:03,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:03,059 INFO L225 Difference]: With dead ends: 742 [2021-07-13 19:27:03,059 INFO L226 Difference]: Without dead ends: 742 [2021-07-13 19:27:03,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:27:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-13 19:27:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 587. [2021-07-13 19:27:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.151877133105802) internal successors, (1847), 586 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1847 transitions. [2021-07-13 19:27:03,066 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1847 transitions. Word has length 19 [2021-07-13 19:27:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:03,066 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1847 transitions. [2021-07-13 19:27:03,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1847 transitions. [2021-07-13 19:27:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:03,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:03,067 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:03,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10238 [2021-07-13 19:27:03,267 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:03,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1903193160, now seen corresponding path program 177 times [2021-07-13 19:27:03,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:03,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035655256] [2021-07-13 19:27:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:03,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:03,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035655256] [2021-07-13 19:27:03,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035655256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:03,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837576382] [2021-07-13 19:27:03,319 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 [2021-07-13 19:27:03,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:27:03,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:03,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:03,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837576382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:03,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:03,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:03,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57497092] [2021-07-13 19:27:03,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:03,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:03,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:03,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:03,377 INFO L87 Difference]: Start difference. First operand 587 states and 1847 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:03,436 INFO L93 Difference]: Finished difference Result 671 states and 2020 transitions. [2021-07-13 19:27:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:27:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:03,437 INFO L225 Difference]: With dead ends: 671 [2021-07-13 19:27:03,437 INFO L226 Difference]: Without dead ends: 657 [2021-07-13 19:27:03,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:03,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-07-13 19:27:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 587. [2021-07-13 19:27:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 3.150170648464164) internal successors, (1846), 586 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) [2021-07-13 19:27:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1846 transitions. [2021-07-13 19:27:03,444 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1846 transitions. Word has length 19 [2021-07-13 19:27:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:03,444 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1846 transitions. [2021-07-13 19:27:03,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1846 transitions. [2021-07-13 19:27:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:03,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:03,445 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:03,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10239,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:03,661 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1492618953, now seen corresponding path program 178 times [2021-07-13 19:27:03,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:03,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953545959] [2021-07-13 19:27:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:03,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953545959] [2021-07-13 19:27:03,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953545959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485438333] [2021-07-13 19:27:03,708 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 [2021-07-13 19:27:03,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:03,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:03,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485438333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:03,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:03,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:03,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564025227] [2021-07-13 19:27:03,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:03,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:03,766 INFO L87 Difference]: Start difference. First operand 587 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:03,939 INFO L93 Difference]: Finished difference Result 828 states and 2326 transitions. [2021-07-13 19:27:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:27:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:03,940 INFO L225 Difference]: With dead ends: 828 [2021-07-13 19:27:03,940 INFO L226 Difference]: Without dead ends: 828 [2021-07-13 19:27:03,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:27:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-13 19:27:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 591. [2021-07-13 19:27:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1491525423728812) internal successors, (1858), 590 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1858 transitions. [2021-07-13 19:27:03,947 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1858 transitions. Word has length 19 [2021-07-13 19:27:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:03,948 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1858 transitions. [2021-07-13 19:27:03,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1858 transitions. [2021-07-13 19:27:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:03,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:03,948 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:04,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10240,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:04,149 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:04,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:04,149 INFO L82 PathProgramCache]: Analyzing trace with hash 290615364, now seen corresponding path program 179 times [2021-07-13 19:27:04,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:04,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712807301] [2021-07-13 19:27:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:04,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:04,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712807301] [2021-07-13 19:27:04,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712807301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379580825] [2021-07-13 19:27:04,200 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 [2021-07-13 19:27:04,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:27:04,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:04,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:04,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:04,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379580825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:04,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:04,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686403981] [2021-07-13 19:27:04,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:04,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:04,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:04,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:04,255 INFO L87 Difference]: Start difference. First operand 591 states and 1858 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:04,319 INFO L93 Difference]: Finished difference Result 869 states and 2474 transitions. [2021-07-13 19:27:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:27:04,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:04,321 INFO L225 Difference]: With dead ends: 869 [2021-07-13 19:27:04,321 INFO L226 Difference]: Without dead ends: 869 [2021-07-13 19:27:04,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-07-13 19:27:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 667. [2021-07-13 19:27:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 3.205705705705706) internal successors, (2135), 666 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 2135 transitions. [2021-07-13 19:27:04,330 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 2135 transitions. Word has length 19 [2021-07-13 19:27:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:04,330 INFO L482 AbstractCegarLoop]: Abstraction has 667 states and 2135 transitions. [2021-07-13 19:27:04,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 2135 transitions. [2021-07-13 19:27:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:04,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:04,331 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:04,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10241,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:04,531 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:04,532 INFO L82 PathProgramCache]: Analyzing trace with hash -486534235, now seen corresponding path program 180 times [2021-07-13 19:27:04,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:04,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248620160] [2021-07-13 19:27:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:04,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248620160] [2021-07-13 19:27:04,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248620160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775942232] [2021-07-13 19:27:04,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:04,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:27:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:04,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775942232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:04,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:04,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:04,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20637591] [2021-07-13 19:27:04,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:04,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:04,642 INFO L87 Difference]: Start difference. First operand 667 states and 2135 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:04,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:04,783 INFO L93 Difference]: Finished difference Result 878 states and 2501 transitions. [2021-07-13 19:27:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:27:04,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:04,784 INFO L225 Difference]: With dead ends: 878 [2021-07-13 19:27:04,784 INFO L226 Difference]: Without dead ends: 876 [2021-07-13 19:27:04,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-07-13 19:27:04,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 684. [2021-07-13 19:27:04,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.2225475841874083) internal successors, (2201), 683 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2201 transitions. [2021-07-13 19:27:04,793 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2201 transitions. Word has length 19 [2021-07-13 19:27:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:04,793 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2201 transitions. [2021-07-13 19:27:04,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2201 transitions. [2021-07-13 19:27:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:04,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:04,794 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:04,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10242 [2021-07-13 19:27:04,994 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:04,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1434864094, now seen corresponding path program 181 times [2021-07-13 19:27:04,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:04,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107721642] [2021-07-13 19:27:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:05,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107721642] [2021-07-13 19:27:05,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107721642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724995801] [2021-07-13 19:27:05,038 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 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 [2021-07-13 19:27:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:05,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724995801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:05,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:05,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905673613] [2021-07-13 19:27:05,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:05,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:05,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:05,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:05,086 INFO L87 Difference]: Start difference. First operand 684 states and 2201 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:05,216 INFO L93 Difference]: Finished difference Result 876 states and 2523 transitions. [2021-07-13 19:27:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:27:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:05,218 INFO L225 Difference]: With dead ends: 876 [2021-07-13 19:27:05,218 INFO L226 Difference]: Without dead ends: 874 [2021-07-13 19:27:05,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-07-13 19:27:05,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 669. [2021-07-13 19:27:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2050898203592815) internal successors, (2141), 668 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2141 transitions. [2021-07-13 19:27:05,226 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2141 transitions. Word has length 19 [2021-07-13 19:27:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:05,226 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2141 transitions. [2021-07-13 19:27:05,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2141 transitions. [2021-07-13 19:27:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:05,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:05,227 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:05,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10243 [2021-07-13 19:27:05,428 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:05,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1224079073, now seen corresponding path program 182 times [2021-07-13 19:27:05,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:05,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901975850] [2021-07-13 19:27:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:05,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901975850] [2021-07-13 19:27:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901975850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542650416] [2021-07-13 19:27:05,486 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 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 [2021-07-13 19:27:05,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542650416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:05,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:05,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594713825] [2021-07-13 19:27:05,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:05,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:05,540 INFO L87 Difference]: Start difference. First operand 669 states and 2141 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:05,616 INFO L93 Difference]: Finished difference Result 868 states and 2462 transitions. [2021-07-13 19:27:05,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:27:05,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:05,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:05,617 INFO L225 Difference]: With dead ends: 868 [2021-07-13 19:27:05,617 INFO L226 Difference]: Without dead ends: 868 [2021-07-13 19:27:05,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:05,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-07-13 19:27:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 674. [2021-07-13 19:27:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.2005943536404162) internal successors, (2154), 673 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2154 transitions. [2021-07-13 19:27:05,625 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2154 transitions. Word has length 19 [2021-07-13 19:27:05,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:05,625 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2154 transitions. [2021-07-13 19:27:05,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:05,625 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2154 transitions. [2021-07-13 19:27:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:05,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:05,626 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:05,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10244 [2021-07-13 19:27:05,827 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:05,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:05,827 INFO L82 PathProgramCache]: Analyzing trace with hash 54540902, now seen corresponding path program 183 times [2021-07-13 19:27:05,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:05,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984387318] [2021-07-13 19:27:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:05,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984387318] [2021-07-13 19:27:05,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984387318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642492011] [2021-07-13 19:27:05,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:05,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:27:05,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:05,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:05,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642492011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:05,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:05,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:05,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894067777] [2021-07-13 19:27:05,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:05,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:05,919 INFO L87 Difference]: Start difference. First operand 674 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:06,031 INFO L93 Difference]: Finished difference Result 905 states and 2624 transitions. [2021-07-13 19:27:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:27:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:06,033 INFO L225 Difference]: With dead ends: 905 [2021-07-13 19:27:06,033 INFO L226 Difference]: Without dead ends: 901 [2021-07-13 19:27:06,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-07-13 19:27:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 674. [2021-07-13 19:27:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.199108469539376) internal successors, (2153), 673 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2153 transitions. [2021-07-13 19:27:06,042 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2153 transitions. Word has length 19 [2021-07-13 19:27:06,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:06,042 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2153 transitions. [2021-07-13 19:27:06,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,042 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2153 transitions. [2021-07-13 19:27:06,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:06,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:06,043 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:06,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10245 [2021-07-13 19:27:06,244 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:06,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:06,244 INFO L82 PathProgramCache]: Analyzing trace with hash -836780729, now seen corresponding path program 184 times [2021-07-13 19:27:06,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:06,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850369651] [2021-07-13 19:27:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:06,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850369651] [2021-07-13 19:27:06,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850369651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105312489] [2021-07-13 19:27:06,292 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:06,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:06,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:06,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105312489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:06,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:06,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903661960] [2021-07-13 19:27:06,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:06,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:06,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:06,357 INFO L87 Difference]: Start difference. First operand 674 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:06,441 INFO L93 Difference]: Finished difference Result 858 states and 2461 transitions. [2021-07-13 19:27:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:27:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:06,442 INFO L225 Difference]: With dead ends: 858 [2021-07-13 19:27:06,442 INFO L226 Difference]: Without dead ends: 858 [2021-07-13 19:27:06,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:27:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-07-13 19:27:06,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 687. [2021-07-13 19:27:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.2011661807580176) internal successors, (2196), 686 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2196 transitions. [2021-07-13 19:27:06,450 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2196 transitions. Word has length 19 [2021-07-13 19:27:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:06,451 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 2196 transitions. [2021-07-13 19:27:06,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2196 transitions. [2021-07-13 19:27:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:06,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:06,452 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:06,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10246 [2021-07-13 19:27:06,652 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:06,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1018544478, now seen corresponding path program 185 times [2021-07-13 19:27:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:06,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962174221] [2021-07-13 19:27:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:06,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962174221] [2021-07-13 19:27:06,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962174221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723525727] [2021-07-13 19:27:06,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:06,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:27:06,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:06,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:06,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723525727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:06,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:06,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:06,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556176312] [2021-07-13 19:27:06,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:06,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:06,743 INFO L87 Difference]: Start difference. First operand 687 states and 2196 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:06,856 INFO L93 Difference]: Finished difference Result 936 states and 2753 transitions. [2021-07-13 19:27:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:27:06,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:06,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:06,858 INFO L225 Difference]: With dead ends: 936 [2021-07-13 19:27:06,858 INFO L226 Difference]: Without dead ends: 930 [2021-07-13 19:27:06,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-13 19:27:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 695. [2021-07-13 19:27:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.2031700288184437) internal successors, (2223), 694 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2223 transitions. [2021-07-13 19:27:06,867 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2223 transitions. Word has length 19 [2021-07-13 19:27:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:06,867 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2223 transitions. [2021-07-13 19:27:06,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2223 transitions. [2021-07-13 19:27:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:06,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:06,869 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:07,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10247,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:07,085 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:07,085 INFO L82 PathProgramCache]: Analyzing trace with hash -298925151, now seen corresponding path program 186 times [2021-07-13 19:27:07,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:07,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125318866] [2021-07-13 19:27:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:07,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:07,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125318866] [2021-07-13 19:27:07,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125318866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491802182] [2021-07-13 19:27:07,133 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 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 [2021-07-13 19:27:07,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:27:07,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:07,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:07,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491802182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:07,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:07,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977838993] [2021-07-13 19:27:07,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:07,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:07,197 INFO L87 Difference]: Start difference. First operand 695 states and 2223 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:07,279 INFO L93 Difference]: Finished difference Result 835 states and 2456 transitions. [2021-07-13 19:27:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:27:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:07,280 INFO L225 Difference]: With dead ends: 835 [2021-07-13 19:27:07,281 INFO L226 Difference]: Without dead ends: 835 [2021-07-13 19:27:07,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:27:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-07-13 19:27:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 707. [2021-07-13 19:27:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.2011331444759206) internal successors, (2260), 706 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2260 transitions. [2021-07-13 19:27:07,289 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2260 transitions. Word has length 19 [2021-07-13 19:27:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:07,289 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2260 transitions. [2021-07-13 19:27:07,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2260 transitions. [2021-07-13 19:27:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:07,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:07,290 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:07,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10248 [2021-07-13 19:27:07,505 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash 75547110, now seen corresponding path program 187 times [2021-07-13 19:27:07,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:07,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965229033] [2021-07-13 19:27:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:07,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:07,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965229033] [2021-07-13 19:27:07,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965229033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163720108] [2021-07-13 19:27:07,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:07,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163720108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:07,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:07,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439527649] [2021-07-13 19:27:07,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:07,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:07,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:07,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:07,600 INFO L87 Difference]: Start difference. First operand 707 states and 2260 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:07,706 INFO L93 Difference]: Finished difference Result 914 states and 2697 transitions. [2021-07-13 19:27:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:27:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:07,708 INFO L225 Difference]: With dead ends: 914 [2021-07-13 19:27:07,708 INFO L226 Difference]: Without dead ends: 906 [2021-07-13 19:27:07,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:27:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-07-13 19:27:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 707. [2021-07-13 19:27:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.198300283286119) internal successors, (2258), 706 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2258 transitions. [2021-07-13 19:27:07,718 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2258 transitions. Word has length 19 [2021-07-13 19:27:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:07,718 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2258 transitions. [2021-07-13 19:27:07,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2258 transitions. [2021-07-13 19:27:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:07,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:07,719 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:07,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10249,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:07,919 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:07,920 INFO L82 PathProgramCache]: Analyzing trace with hash -805271417, now seen corresponding path program 188 times [2021-07-13 19:27:07,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:07,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593829851] [2021-07-13 19:27:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:07,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593829851] [2021-07-13 19:27:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593829851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:07,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400236919] [2021-07-13 19:27:07,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:07,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:07,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:07,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:27:08,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400236919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:08,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:27:08,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167740149] [2021-07-13 19:27:08,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:27:08,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:27:08,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:27:08,019 INFO L87 Difference]: Start difference. First operand 707 states and 2258 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:08,086 INFO L93 Difference]: Finished difference Result 812 states and 2469 transitions. [2021-07-13 19:27:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:27:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:08,088 INFO L225 Difference]: With dead ends: 812 [2021-07-13 19:27:08,088 INFO L226 Difference]: Without dead ends: 812 [2021-07-13 19:27:08,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-13 19:27:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 737. [2021-07-13 19:27:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.1956521739130435) internal successors, (2352), 736 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2352 transitions. [2021-07-13 19:27:08,097 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2352 transitions. Word has length 19 [2021-07-13 19:27:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:08,097 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2352 transitions. [2021-07-13 19:27:08,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2352 transitions. [2021-07-13 19:27:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:08,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:08,098 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:08,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10250,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:08,298 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:08,299 INFO L82 PathProgramCache]: Analyzing trace with hash -367352030, now seen corresponding path program 189 times [2021-07-13 19:27:08,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:08,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997228925] [2021-07-13 19:27:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:08,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:08,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997228925] [2021-07-13 19:27:08,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997228925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173689023] [2021-07-13 19:27:08,340 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 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 [2021-07-13 19:27:08,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:27:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173689023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:08,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239784525] [2021-07-13 19:27:08,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:08,398 INFO L87 Difference]: Start difference. First operand 737 states and 2352 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:08,513 INFO L93 Difference]: Finished difference Result 930 states and 2762 transitions. [2021-07-13 19:27:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:27:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:08,515 INFO L225 Difference]: With dead ends: 930 [2021-07-13 19:27:08,515 INFO L226 Difference]: Without dead ends: 920 [2021-07-13 19:27:08,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:27:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-13 19:27:08,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 766. [2021-07-13 19:27:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.197385620915033) internal successors, (2446), 765 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2446 transitions. [2021-07-13 19:27:08,525 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2446 transitions. Word has length 19 [2021-07-13 19:27:08,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:08,525 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2446 transitions. [2021-07-13 19:27:08,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,525 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2446 transitions. [2021-07-13 19:27:08,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:08,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:08,526 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:08,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10251,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:08,727 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash 677863521, now seen corresponding path program 190 times [2021-07-13 19:27:08,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:08,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673203060] [2021-07-13 19:27:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:08,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673203060] [2021-07-13 19:27:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673203060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704212666] [2021-07-13 19:27:08,776 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 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 [2021-07-13 19:27:08,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:08,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704212666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:08,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:08,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:08,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067272312] [2021-07-13 19:27:08,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:08,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:08,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:08,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:08,836 INFO L87 Difference]: Start difference. First operand 766 states and 2446 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:08,955 INFO L93 Difference]: Finished difference Result 870 states and 2608 transitions. [2021-07-13 19:27:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:27:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:08,956 INFO L225 Difference]: With dead ends: 870 [2021-07-13 19:27:08,956 INFO L226 Difference]: Without dead ends: 870 [2021-07-13 19:27:08,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:27:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-07-13 19:27:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 762. [2021-07-13 19:27:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1984231274638635) internal successors, (2434), 761 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2434 transitions. [2021-07-13 19:27:08,965 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2434 transitions. Word has length 19 [2021-07-13 19:27:08,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:08,966 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2434 transitions. [2021-07-13 19:27:08,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2434 transitions. [2021-07-13 19:27:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:08,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:08,967 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:09,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:09,167 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:09,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1212323482, now seen corresponding path program 191 times [2021-07-13 19:27:09,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:09,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505732883] [2021-07-13 19:27:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:09,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505732883] [2021-07-13 19:27:09,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505732883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822259388] [2021-07-13 19:27:09,210 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 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 [2021-07-13 19:27:09,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:27:09,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:09,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822259388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:09,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:09,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297711936] [2021-07-13 19:27:09,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:09,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:09,266 INFO L87 Difference]: Start difference. First operand 762 states and 2434 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:09,329 INFO L93 Difference]: Finished difference Result 853 states and 2620 transitions. [2021-07-13 19:27:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:27:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:09,331 INFO L225 Difference]: With dead ends: 853 [2021-07-13 19:27:09,331 INFO L226 Difference]: Without dead ends: 841 [2021-07-13 19:27:09,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:27:09,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-07-13 19:27:09,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 762. [2021-07-13 19:27:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.1971090670170828) internal successors, (2433), 761 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2433 transitions. [2021-07-13 19:27:09,341 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2433 transitions. Word has length 19 [2021-07-13 19:27:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:09,341 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2433 transitions. [2021-07-13 19:27:09,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2433 transitions. [2021-07-13 19:27:09,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:09,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:09,342 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:09,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10253,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:09,542 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash -589593657, now seen corresponding path program 192 times [2021-07-13 19:27:09,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:09,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574546152] [2021-07-13 19:27:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:09,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574546152] [2021-07-13 19:27:09,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574546152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900929187] [2021-07-13 19:27:09,593 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 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 [2021-07-13 19:27:09,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:27:09,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:09,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:09,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:09,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900929187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:09,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:09,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:09,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175411684] [2021-07-13 19:27:09,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:09,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:09,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:09,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:09,655 INFO L87 Difference]: Start difference. First operand 762 states and 2433 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:09,794 INFO L93 Difference]: Finished difference Result 875 states and 2625 transitions. [2021-07-13 19:27:09,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:27:09,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:09,796 INFO L225 Difference]: With dead ends: 875 [2021-07-13 19:27:09,796 INFO L226 Difference]: Without dead ends: 875 [2021-07-13 19:27:09,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-13 19:27:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 759. [2021-07-13 19:27:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1978891820580473) internal successors, (2424), 758 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2424 transitions. [2021-07-13 19:27:09,805 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2424 transitions. Word has length 19 [2021-07-13 19:27:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:09,805 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2424 transitions. [2021-07-13 19:27:09,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2424 transitions. [2021-07-13 19:27:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:09,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:09,806 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:10,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-07-13 19:27:10,007 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1636634718, now seen corresponding path program 193 times [2021-07-13 19:27:10,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:10,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701177866] [2021-07-13 19:27:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:10,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:10,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701177866] [2021-07-13 19:27:10,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701177866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206052799] [2021-07-13 19:27:10,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:10,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206052799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:10,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:10,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345764682] [2021-07-13 19:27:10,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:10,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:10,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:10,111 INFO L87 Difference]: Start difference. First operand 759 states and 2424 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:10,177 INFO L93 Difference]: Finished difference Result 848 states and 2607 transitions. [2021-07-13 19:27:10,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:27:10,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:10,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:10,178 INFO L225 Difference]: With dead ends: 848 [2021-07-13 19:27:10,178 INFO L226 Difference]: Without dead ends: 834 [2021-07-13 19:27:10,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:27:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-07-13 19:27:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 759. [2021-07-13 19:27:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-07-13 19:27:10,187 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-07-13 19:27:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:10,187 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-07-13 19:27:10,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-07-13 19:27:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:10,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:10,189 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:10,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10255 [2021-07-13 19:27:10,389 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:10,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:10,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1226060511, now seen corresponding path program 194 times [2021-07-13 19:27:10,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:10,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495049081] [2021-07-13 19:27:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:10,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:10,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495049081] [2021-07-13 19:27:10,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495049081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348361138] [2021-07-13 19:27:10,445 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 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 [2021-07-13 19:27:10,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:10,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:10,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348361138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:10,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:10,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91129759] [2021-07-13 19:27:10,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:10,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:10,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:10,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:10,509 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:10,649 INFO L93 Difference]: Finished difference Result 921 states and 2738 transitions. [2021-07-13 19:27:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:27:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:10,651 INFO L225 Difference]: With dead ends: 921 [2021-07-13 19:27:10,651 INFO L226 Difference]: Without dead ends: 921 [2021-07-13 19:27:10,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-07-13 19:27:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 759. [2021-07-13 19:27:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.1965699208443272) internal successors, (2423), 758 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2423 transitions. [2021-07-13 19:27:10,660 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2423 transitions. Word has length 19 [2021-07-13 19:27:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:10,660 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2423 transitions. [2021-07-13 19:27:10,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2423 transitions. [2021-07-13 19:27:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:10,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:10,661 INFO L508 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:10,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10256 [2021-07-13 19:27:10,862 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1905381146, now seen corresponding path program 195 times [2021-07-13 19:27:10,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:10,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151631885] [2021-07-13 19:27:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:10,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:10,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151631885] [2021-07-13 19:27:10,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151631885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384886653] [2021-07-13 19:27:10,912 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 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 [2021-07-13 19:27:10,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:27:10,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:10,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384886653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:10,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:10,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:10,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380517213] [2021-07-13 19:27:10,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:10,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:10,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:10,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:10,968 INFO L87 Difference]: Start difference. First operand 759 states and 2423 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:11,018 INFO L93 Difference]: Finished difference Result 846 states and 2603 transitions. [2021-07-13 19:27:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:27:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:11,020 INFO L225 Difference]: With dead ends: 846 [2021-07-13 19:27:11,020 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 19:27:11,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:27:11,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 19:27:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 757. [2021-07-13 19:27:11,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1997354497354498) internal successors, (2419), 756 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2419 transitions. [2021-07-13 19:27:11,028 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2419 transitions. Word has length 19 [2021-07-13 19:27:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:11,029 INFO L482 AbstractCegarLoop]: Abstraction has 757 states and 2419 transitions. [2021-07-13 19:27:11,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2419 transitions. [2021-07-13 19:27:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:27:11,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:11,030 INFO L508 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:11,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10257 [2021-07-13 19:27:11,230 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:11,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash 518303495, now seen corresponding path program 196 times [2021-07-13 19:27:11,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:11,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556621314] [2021-07-13 19:27:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:11,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556621314] [2021-07-13 19:27:11,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556621314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516511444] [2021-07-13 19:27:11,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:27:11,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:27:11,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:27:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:11,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516511444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:11,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:11,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:27:11,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207506173] [2021-07-13 19:27:11,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:27:11,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:11,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:27:11,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:27:11,342 INFO L87 Difference]: Start difference. First operand 757 states and 2419 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:11,489 INFO L93 Difference]: Finished difference Result 1025 states and 3016 transitions. [2021-07-13 19:27:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:27:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:27:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:11,491 INFO L225 Difference]: With dead ends: 1025 [2021-07-13 19:27:11,491 INFO L226 Difference]: Without dead ends: 1025 [2021-07-13 19:27:11,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:27:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-13 19:27:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 769. [2021-07-13 19:27:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1927083333333335) internal successors, (2452), 768 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2452 transitions. [2021-07-13 19:27:11,501 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2452 transitions. Word has length 19 [2021-07-13 19:27:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:11,501 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2452 transitions. [2021-07-13 19:27:11,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2452 transitions. [2021-07-13 19:27:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:27:11,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:11,502 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:11,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10258 [2021-07-13 19:27:11,719 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1714157417, now seen corresponding path program 197 times [2021-07-13 19:27:11,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:11,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391909847] [2021-07-13 19:27:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:11,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391909847] [2021-07-13 19:27:11,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391909847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720466168] [2021-07-13 19:27:11,834 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 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 [2021-07-13 19:27:11,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:27:11,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:11,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:27:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:12,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:12,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:27:12,843 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 262 [2021-07-13 19:27:13,929 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 332 [2021-07-13 19:27:14,145 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 394 [2021-07-13 19:27:14,418 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-07-13 19:27:14,691 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 384 [2021-07-13 19:27:14,993 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 522 DAG size of output: 389 [2021-07-13 19:27:15,234 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 359 [2021-07-13 19:27:15,368 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 251 [2021-07-13 19:27:15,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:15,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:15,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:15,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:27:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:15,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720466168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:15,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:15,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 19:27:15,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498957947] [2021-07-13 19:27:15,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:27:15,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:15,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:27:15,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:27:15,917 INFO L87 Difference]: Start difference. First operand 769 states and 2452 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:16,303 INFO L93 Difference]: Finished difference Result 853 states and 2629 transitions. [2021-07-13 19:27:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:27:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 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 20 [2021-07-13 19:27:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:16,305 INFO L225 Difference]: With dead ends: 853 [2021-07-13 19:27:16,305 INFO L226 Difference]: Without dead ends: 826 [2021-07-13 19:27:16,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:27:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-07-13 19:27:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 787. [2021-07-13 19:27:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 3.1895674300254453) internal successors, (2507), 786 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2507 transitions. [2021-07-13 19:27:16,315 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2507 transitions. Word has length 20 [2021-07-13 19:27:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:16,315 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2507 transitions. [2021-07-13 19:27:16,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2507 transitions. [2021-07-13 19:27:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:27:16,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:16,316 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:16,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10259,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:16,516 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:16,517 INFO L82 PathProgramCache]: Analyzing trace with hash -122454295, now seen corresponding path program 198 times [2021-07-13 19:27:16,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:16,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162030532] [2021-07-13 19:27:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:16,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162030532] [2021-07-13 19:27:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162030532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115274539] [2021-07-13 19:27:16,617 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 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 [2021-07-13 19:27:16,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:27:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:16,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:27:16,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:17,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:17,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:27:17,766 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 353 [2021-07-13 19:27:19,106 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-07-13 19:27:19,329 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 349 [2021-07-13 19:27:19,557 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 356 [2021-07-13 19:27:19,752 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 338 [2021-07-13 19:27:20,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:20,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:20,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:20,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:27:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115274539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:20,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:20,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:27:20,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974351628] [2021-07-13 19:27:20,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:27:20,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:20,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:27:20,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:20,524 INFO L87 Difference]: Start difference. First operand 787 states and 2507 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:20,862 INFO L93 Difference]: Finished difference Result 877 states and 2701 transitions. [2021-07-13 19:27:20,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:27:20,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:27:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:20,864 INFO L225 Difference]: With dead ends: 877 [2021-07-13 19:27:20,864 INFO L226 Difference]: Without dead ends: 861 [2021-07-13 19:27:20,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:27:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-07-13 19:27:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 806. [2021-07-13 19:27:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 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) [2021-07-13 19:27:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-07-13 19:27:20,873 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-07-13 19:27:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:20,873 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-07-13 19:27:20,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-07-13 19:27:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:27:20,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:20,874 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:21,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10557 [2021-07-13 19:27:21,075 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:21,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:21,075 INFO L82 PathProgramCache]: Analyzing trace with hash 736420235, now seen corresponding path program 199 times [2021-07-13 19:27:21,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:21,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304623550] [2021-07-13 19:27:21,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:21,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:21,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304623550] [2021-07-13 19:27:21,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304623550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:21,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077212397] [2021-07-13 19:27:21,179 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 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 [2021-07-13 19:27:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:21,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:27:21,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:21,843 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 2028 DAG size of output: 48 [2021-07-13 19:27:21,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:21,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:27:22,421 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 188 [2021-07-13 19:27:23,083 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 237 [2021-07-13 19:27:23,261 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-07-13 19:27:23,477 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 308 [2021-07-13 19:27:23,693 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 313 [2021-07-13 19:27:23,849 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 274 [2021-07-13 19:27:24,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:25,142 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:27:25,143 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:27:25,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:27:26,289 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 241 [2021-07-13 19:27:26,445 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 264 [2021-07-13 19:27:27,175 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-07-13 19:27:27,473 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 354 [2021-07-13 19:27:27,833 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 364 [2021-07-13 19:27:28,003 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 245 [2021-07-13 19:27:28,149 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 248 [2021-07-13 19:27:28,976 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 225 [2021-07-13 19:27:29,141 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-07-13 19:27:29,290 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 237 [2021-07-13 19:27:29,449 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 240 [2021-07-13 19:27:29,632 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 248 [2021-07-13 19:27:30,464 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 176 [2021-07-13 19:27:31,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:27:31,392 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:27:31,392 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:27:31,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:27:31,964 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 263 [2021-07-13 19:27:32,945 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 267 [2021-07-13 19:27:33,107 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 283 [2021-07-13 19:27:33,266 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 296 [2021-07-13 19:27:34,440 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 314 [2021-07-13 19:27:34,626 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 339 [2021-07-13 19:27:35,035 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 777 DAG size of output: 513 [2021-07-13 19:27:35,516 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-07-13 19:27:36,008 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 531 [2021-07-13 19:27:36,615 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 543 [2021-07-13 19:27:37,061 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 456 [2021-07-13 19:27:37,472 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 292 [2021-07-13 19:27:38,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:27:38,515 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:27:38,516 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:27:38,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:27:39,131 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 214 [2021-07-13 19:27:39,235 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 238 [2021-07-13 19:27:40,427 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-07-13 19:27:40,574 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 239 [2021-07-13 19:27:40,788 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 253 [2021-07-13 19:27:41,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:27:41,564 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:27:41,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:27:41,565 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:27:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:41,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077212397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:41,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:41,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:27:41,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621492066] [2021-07-13 19:27:41,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:27:41,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:41,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:27:41,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:41,593 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:41,977 INFO L93 Difference]: Finished difference Result 901 states and 2754 transitions. [2021-07-13 19:27:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:27:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:27:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:41,979 INFO L225 Difference]: With dead ends: 901 [2021-07-13 19:27:41,979 INFO L226 Difference]: Without dead ends: 891 [2021-07-13 19:27:41,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:27:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-07-13 19:27:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 806. [2021-07-13 19:27:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1962732919254657) internal successors, (2573), 805 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) [2021-07-13 19:27:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2573 transitions. [2021-07-13 19:27:41,989 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2573 transitions. Word has length 20 [2021-07-13 19:27:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:41,989 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2573 transitions. [2021-07-13 19:27:41,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2573 transitions. [2021-07-13 19:27:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:27:41,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:41,990 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:42,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10960,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:42,191 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:42,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1564059463, now seen corresponding path program 200 times [2021-07-13 19:27:42,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:42,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807582221] [2021-07-13 19:27:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:42,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:42,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807582221] [2021-07-13 19:27:42,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807582221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:42,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224130259] [2021-07-13 19:27:42,292 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 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 [2021-07-13 19:27:42,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:27:42,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:42,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:27:42,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:42,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:27:44,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:44,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:44,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:27:44,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:27:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224130259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:44,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:27:44,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:27:44,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132895624] [2021-07-13 19:27:44,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:27:44,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:27:44,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:27:44,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:27:44,037 INFO L87 Difference]: Start difference. First operand 806 states and 2573 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:44,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:27:44,480 INFO L93 Difference]: Finished difference Result 938 states and 2953 transitions. [2021-07-13 19:27:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:27:44,480 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:27:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:27:44,482 INFO L225 Difference]: With dead ends: 938 [2021-07-13 19:27:44,482 INFO L226 Difference]: Without dead ends: 922 [2021-07-13 19:27:44,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:27:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-07-13 19:27:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 871. [2021-07-13 19:27:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.2367816091954023) internal successors, (2816), 870 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2816 transitions. [2021-07-13 19:27:44,492 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2816 transitions. Word has length 20 [2021-07-13 19:27:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:27:44,493 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2816 transitions. [2021-07-13 19:27:44,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:27:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2816 transitions. [2021-07-13 19:27:44,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:27:44,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:27:44,494 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:27:44,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12509,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:27:44,694 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:27:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:27:44,695 INFO L82 PathProgramCache]: Analyzing trace with hash -705184933, now seen corresponding path program 201 times [2021-07-13 19:27:44,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:27:44,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871744985] [2021-07-13 19:27:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:27:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:27:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:27:44,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:27:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871744985] [2021-07-13 19:27:44,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871744985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:27:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651436644] [2021-07-13 19:27:44,795 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 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 [2021-07-13 19:27:44,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:27:44,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:27:44,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:27:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:27:45,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:27:45,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:27:45,960 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 262 [2021-07-13 19:27:46,297 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 358 [2021-07-13 19:27:46,534 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 318 [2021-07-13 19:27:46,796 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 183 [2021-07-13 19:27:47,654 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 202 [2021-07-13 19:27:47,895 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 158 [2021-07-13 19:27:48,501 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-07-13 19:27:48,724 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 574 DAG size of output: 261 [2021-07-13 19:27:48,961 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 268 [2021-07-13 19:27:49,092 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 231 [2021-07-13 19:27:49,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:27:50,070 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:27:50,071 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:27:50,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:27:51,680 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 212 [2021-07-13 19:27:51,877 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 224 [2021-07-13 19:27:52,138 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 239 [2021-07-13 19:27:53,053 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 221 [2021-07-13 19:27:53,232 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 231 [2021-07-13 19:27:53,469 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 252 [2021-07-13 19:27:53,766 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 262 [2021-07-13 19:27:54,359 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 329 [2021-07-13 19:27:54,965 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 348 [2021-07-13 19:27:56,025 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 185 [2021-07-13 19:27:56,193 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 234 [2021-07-13 19:27:56,399 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 249 [2021-07-13 19:27:56,642 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 259 [2021-07-13 19:27:56,913 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 272 [2021-07-13 19:27:57,611 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 206 [2021-07-13 19:27:57,727 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 214 [2021-07-13 19:27:57,875 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 241 [2021-07-13 19:27:58,047 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 251 [2021-07-13 19:27:58,290 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 294 [2021-07-13 19:27:58,873 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 359 [2021-07-13 19:27:59,560 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 398 [2021-07-13 19:28:00,295 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 399 [2021-07-13 19:28:01,858 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 965 DAG size of output: 559 [2021-07-13 19:28:03,608 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-07-13 19:28:05,383 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 1033 DAG size of output: 607 [2021-07-13 19:28:07,235 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 1039 DAG size of output: 578 [2021-07-13 19:28:08,496 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 580 DAG size of output: 594 [2021-07-13 19:28:09,670 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 573 DAG size of output: 578 [2021-07-13 19:28:11,005 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 567 DAG size of output: 601 [2021-07-13 19:28:12,376 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 562 DAG size of output: 494 [2021-07-13 19:28:12,491 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 443 [2021-07-13 19:28:12,687 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 409 [2021-07-13 19:28:13,577 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 210 [2021-07-13 19:28:13,697 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 216 [2021-07-13 19:28:13,856 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 235 [2021-07-13 19:28:14,018 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 265 [2021-07-13 19:28:14,255 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 299 [2021-07-13 19:28:14,633 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 359 [2021-07-13 19:28:15,107 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 550 DAG size of output: 376 [2021-07-13 19:28:15,686 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-07-13 19:28:16,283 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 422 [2021-07-13 19:28:16,964 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 426 [2021-07-13 19:28:17,975 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 428 DAG size of output: 651 [2021-07-13 19:28:18,614 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 343 [2021-07-13 19:28:19,377 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 351 [2021-07-13 19:28:20,321 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 272 [2021-07-13 19:28:20,510 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 286 [2021-07-13 19:28:20,792 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 392 [2021-07-13 19:28:21,403 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 453 [2021-07-13 19:28:22,065 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 323 [2021-07-13 19:28:22,953 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 259 [2021-07-13 19:28:23,106 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 270 [2021-07-13 19:28:23,280 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 273 [2021-07-13 19:28:23,585 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 313 [2021-07-13 19:28:24,002 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 382 [2021-07-13 19:28:24,399 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 444 [2021-07-13 19:28:25,216 WARN L205 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-07-13 19:28:26,017 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 679 [2021-07-13 19:28:26,908 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 1028 DAG size of output: 677 [2021-07-13 19:28:27,149 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 258 [2021-07-13 19:28:27,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:28:28,065 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:28:28,066 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:28:28,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:28:29,238 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-07-13 19:28:29,408 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 597 DAG size of output: 410 [2021-07-13 19:28:29,649 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 416 [2021-07-13 19:28:29,944 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 522 [2021-07-13 19:28:30,320 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 518 [2021-07-13 19:28:30,645 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 479 [2021-07-13 19:28:30,949 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 485 [2021-07-13 19:28:31,186 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 350 [2021-07-13 19:28:31,947 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 347 [2021-07-13 19:28:32,264 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 416 [2021-07-13 19:28:32,444 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 331 [2021-07-13 19:28:33,299 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 405 [2021-07-13 19:28:33,789 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 576 [2021-07-13 19:28:34,543 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 969 DAG size of output: 660 [2021-07-13 19:28:34,725 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 352 [2021-07-13 19:28:34,875 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 303 [2021-07-13 19:28:35,397 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 248 [2021-07-13 19:28:35,990 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 390 [2021-07-13 19:28:36,107 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 249 [2021-07-13 19:28:36,227 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 227 [2021-07-13 19:28:37,209 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 334 [2021-07-13 19:28:37,693 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 554 [2021-07-13 19:28:38,716 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1305 DAG size of output: 734 [2021-07-13 19:28:40,006 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-07-13 19:28:41,296 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 1481 DAG size of output: 824 [2021-07-13 19:28:42,879 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 1487 DAG size of output: 829 [2021-07-13 19:28:44,521 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 831 DAG size of output: 1033 [2021-07-13 19:28:46,216 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 779 DAG size of output: 893 [2021-07-13 19:28:46,923 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 555 [2021-07-13 19:28:47,732 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 258 [2021-07-13 19:28:47,941 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 326 [2021-07-13 19:28:48,715 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 239 [2021-07-13 19:28:49,017 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 579 DAG size of output: 408 [2021-07-13 19:28:49,159 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 573 [2021-07-13 19:28:49,812 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 526 [2021-07-13 19:28:50,394 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 251 [2021-07-13 19:28:50,819 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 314 [2021-07-13 19:28:50,928 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 207 [2021-07-13 19:28:51,600 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 411 [2021-07-13 19:28:51,942 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 448 [2021-07-13 19:28:52,613 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 720 [2021-07-13 19:28:53,531 WARN L205 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 619 [2021-07-13 19:28:54,055 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 481 [2021-07-13 19:28:54,220 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 242 [2021-07-13 19:28:54,815 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 246 [2021-07-13 19:28:55,379 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 261 [2021-07-13 19:28:55,595 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 295 [2021-07-13 19:28:55,943 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 359 [2021-07-13 19:28:56,903 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 264 [2021-07-13 19:28:57,056 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 269 [2021-07-13 19:28:57,418 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 680 DAG size of output: 449 [2021-07-13 19:28:58,530 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-07-13 19:28:59,652 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 1606 DAG size of output: 905 [2021-07-13 19:29:00,928 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 1612 DAG size of output: 912 [2021-07-13 19:29:01,752 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 718 [2021-07-13 19:29:02,072 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 242 [2021-07-13 19:29:02,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:29:02,856 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:29:02,857 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:29:02,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:29:04,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:29:04,363 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:29:04,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:04,364 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:29:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:04,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651436644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:04,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:04,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:29:04,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593666485] [2021-07-13 19:29:04,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:29:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:29:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:04,392 INFO L87 Difference]: Start difference. First operand 871 states and 2816 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:04,833 INFO L93 Difference]: Finished difference Result 978 states and 3027 transitions. [2021-07-13 19:29:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:29:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:29:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:04,835 INFO L225 Difference]: With dead ends: 978 [2021-07-13 19:29:04,835 INFO L226 Difference]: Without dead ends: 959 [2021-07-13 19:29:04,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:29:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-07-13 19:29:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 869. [2021-07-13 19:29:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.224654377880184) internal successors, (2799), 868 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2799 transitions. [2021-07-13 19:29:04,845 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2799 transitions. Word has length 20 [2021-07-13 19:29:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:04,846 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2799 transitions. [2021-07-13 19:29:04,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2799 transitions. [2021-07-13 19:29:04,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:29:04,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:04,847 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:05,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12726,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:29:05,047 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:05,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1005428375, now seen corresponding path program 202 times [2021-07-13 19:29:05,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:05,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688105235] [2021-07-13 19:29:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:05,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:05,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688105235] [2021-07-13 19:29:05,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688105235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:05,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540665918] [2021-07-13 19:29:05,149 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 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 [2021-07-13 19:29:05,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:29:05,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:05,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:05,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:05,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:29:06,316 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 249 [2021-07-13 19:29:06,451 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 202 [2021-07-13 19:29:06,726 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 238 [2021-07-13 19:29:07,644 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-07-13 19:29:07,767 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 232 [2021-07-13 19:29:07,908 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 237 [2021-07-13 19:29:08,022 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 239 [2021-07-13 19:29:08,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:08,795 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:29:08,795 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:29:08,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:29:09,508 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 255 [2021-07-13 19:29:09,662 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 299 [2021-07-13 19:29:10,655 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 315 [2021-07-13 19:29:10,844 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-07-13 19:29:11,023 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 326 [2021-07-13 19:29:11,234 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 337 [2021-07-13 19:29:11,581 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 399 [2021-07-13 19:29:11,923 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 308 [2021-07-13 19:29:12,207 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 310 [2021-07-13 19:29:13,172 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 265 [2021-07-13 19:29:14,617 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 291 [2021-07-13 19:29:15,217 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 434 [2021-07-13 19:29:15,775 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 610 DAG size of output: 577 [2021-07-13 19:29:16,438 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 578 [2021-07-13 19:29:17,246 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 653 [2021-07-13 19:29:17,410 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 266 [2021-07-13 19:29:18,328 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 228 [2021-07-13 19:29:18,482 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 247 [2021-07-13 19:29:19,418 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 233 [2021-07-13 19:29:19,852 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 301 [2021-07-13 19:29:20,711 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 458 [2021-07-13 19:29:21,289 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 463 [2021-07-13 19:29:22,020 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 569 [2021-07-13 19:29:23,719 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-07-13 19:29:25,396 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 1194 DAG size of output: 1035 [2021-07-13 19:29:27,110 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 1200 DAG size of output: 859 [2021-07-13 19:29:28,376 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 861 DAG size of output: 700 [2021-07-13 19:29:29,269 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 590 [2021-07-13 19:29:29,787 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 672 [2021-07-13 19:29:30,699 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 215 [2021-07-13 19:29:30,866 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-07-13 19:29:31,033 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 230 [2021-07-13 19:29:31,203 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 234 [2021-07-13 19:29:31,360 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 255 [2021-07-13 19:29:32,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:29:32,352 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:29:32,353 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:29:32,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:29:34,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:29:34,668 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:29:34,669 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:29:34,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:29:35,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:29:35,816 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:29:35,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:29:35,817 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:29:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:35,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540665918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:35,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:35,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:29:35,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170419467] [2021-07-13 19:29:35,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:29:35,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:35,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:29:35,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:35,857 INFO L87 Difference]: Start difference. First operand 869 states and 2799 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:36,298 INFO L93 Difference]: Finished difference Result 942 states and 2954 transitions. [2021-07-13 19:29:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:29:36,299 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:29:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:36,300 INFO L225 Difference]: With dead ends: 942 [2021-07-13 19:29:36,300 INFO L226 Difference]: Without dead ends: 932 [2021-07-13 19:29:36,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:29:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-07-13 19:29:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 872. [2021-07-13 19:29:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.2238805970149254) internal successors, (2808), 871 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2808 transitions. [2021-07-13 19:29:36,310 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2808 transitions. Word has length 20 [2021-07-13 19:29:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:36,310 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2808 transitions. [2021-07-13 19:29:36,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2808 transitions. [2021-07-13 19:29:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:29:36,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:36,312 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:36,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15864 [2021-07-13 19:29:36,512 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:36,513 INFO L82 PathProgramCache]: Analyzing trace with hash 990820585, now seen corresponding path program 203 times [2021-07-13 19:29:36,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:36,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810531887] [2021-07-13 19:29:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:36,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:36,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810531887] [2021-07-13 19:29:36,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810531887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:36,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621039546] [2021-07-13 19:29:36,610 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 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 [2021-07-13 19:29:36,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:29:36,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:29:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:37,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:37,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:29:37,523 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 312 [2021-07-13 19:29:38,001 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 475 [2021-07-13 19:29:38,202 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-07-13 19:29:38,407 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 485 [2021-07-13 19:29:38,653 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 496 [2021-07-13 19:29:38,951 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 658 [2021-07-13 19:29:39,079 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 446 [2021-07-13 19:29:39,882 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-07-13 19:29:40,028 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 294 [2021-07-13 19:29:40,259 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 584 DAG size of output: 318 [2021-07-13 19:29:40,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:40,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:40,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:29:40,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:3 [2021-07-13 19:29:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:40,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621039546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:40,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:29:40,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:29:40,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698378620] [2021-07-13 19:29:40,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:29:40,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:29:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:29:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:29:40,678 INFO L87 Difference]: Start difference. First operand 872 states and 2808 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:29:41,201 INFO L93 Difference]: Finished difference Result 1010 states and 3206 transitions. [2021-07-13 19:29:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:29:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:29:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:29:41,203 INFO L225 Difference]: With dead ends: 1010 [2021-07-13 19:29:41,203 INFO L226 Difference]: Without dead ends: 994 [2021-07-13 19:29:41,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:29:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-13 19:29:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 941. [2021-07-13 19:29:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.2542553191489363) internal successors, (3059), 940 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:41,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3059 transitions. [2021-07-13 19:29:41,214 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3059 transitions. Word has length 20 [2021-07-13 19:29:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:29:41,214 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3059 transitions. [2021-07-13 19:29:41,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:29:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3059 transitions. [2021-07-13 19:29:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:29:41,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:29:41,215 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:29:41,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18783 [2021-07-13 19:29:41,416 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:29:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:29:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1849695115, now seen corresponding path program 204 times [2021-07-13 19:29:41,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:29:41,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459493559] [2021-07-13 19:29:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:29:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:29:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:29:41,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:29:41,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459493559] [2021-07-13 19:29:41,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459493559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:29:41,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168966009] [2021-07-13 19:29:41,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:29:41,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:29:41,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:29:41,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:29:41,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:29:41,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:29:41,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:29:43,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:29:43,752 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:29:43,753 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:29:43,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:29:45,565 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 375 [2021-07-13 19:29:45,819 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-07-13 19:29:46,061 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 404 [2021-07-13 19:29:46,336 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 394 [2021-07-13 19:29:46,599 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 391 [2021-07-13 19:29:46,755 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 302 [2021-07-13 19:29:46,956 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 266 [2021-07-13 19:29:47,122 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 271 [2021-07-13 19:29:47,739 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 249 [2021-07-13 19:29:47,862 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 259 [2021-07-13 19:29:48,429 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 331 [2021-07-13 19:29:49,403 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 258 [2021-07-13 19:29:49,558 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 280 [2021-07-13 19:29:49,914 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 299 [2021-07-13 19:29:50,313 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 478 [2021-07-13 19:29:50,795 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 504 [2021-07-13 19:29:51,414 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-07-13 19:29:52,022 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 804 DAG size of output: 581 [2021-07-13 19:29:52,677 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 809 DAG size of output: 559 [2021-07-13 19:29:53,225 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 561 [2021-07-13 19:29:54,230 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 465 [2021-07-13 19:29:54,947 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 355 [2021-07-13 19:29:55,183 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 370 [2021-07-13 19:29:55,461 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-07-13 19:29:55,699 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 378 [2021-07-13 19:29:55,975 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-07-13 19:29:56,444 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 291 [2021-07-13 19:29:57,008 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 229 [2021-07-13 19:29:57,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:29:57,768 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:29:57,768 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:29:57,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:29:59,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:30:00,065 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:30:00,066 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:30:00,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:30:01,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:30:01,345 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:30:01,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:30:01,346 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:30:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:01,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168966009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:01,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:30:01,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:30:01,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226558572] [2021-07-13 19:30:01,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:30:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:30:01,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:30:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:30:01,374 INFO L87 Difference]: Start difference. First operand 941 states and 3059 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:30:02,006 INFO L93 Difference]: Finished difference Result 1081 states and 3355 transitions. [2021-07-13 19:30:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:30:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:30:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:30:02,008 INFO L225 Difference]: With dead ends: 1081 [2021-07-13 19:30:02,008 INFO L226 Difference]: Without dead ends: 1055 [2021-07-13 19:30:02,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:30:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-07-13 19:30:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 947. [2021-07-13 19:30:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.251585623678647) internal successors, (3076), 946 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3076 transitions. [2021-07-13 19:30:02,020 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3076 transitions. Word has length 20 [2021-07-13 19:30:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:30:02,020 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3076 transitions. [2021-07-13 19:30:02,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:30:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3076 transitions. [2021-07-13 19:30:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:30:02,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:30:02,021 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:30:02,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19257,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:30:02,222 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:30:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:30:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash -734658873, now seen corresponding path program 205 times [2021-07-13 19:30:02,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:30:02,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628732529] [2021-07-13 19:30:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:30:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:30:02,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:30:02,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628732529] [2021-07-13 19:30:02,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628732529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:30:02,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735068351] [2021-07-13 19:30:02,325 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 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 [2021-07-13 19:30:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:30:02,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:30:02,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:30:02,650 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 49 [2021-07-13 19:30:02,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:30:02,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:30:03,477 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 256 [2021-07-13 19:30:03,588 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 273 [2021-07-13 19:30:04,351 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-07-13 19:30:04,476 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 254 [2021-07-13 19:30:04,628 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 262 [2021-07-13 19:30:04,767 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 253 [2021-07-13 19:30:05,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:30:05,613 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:30:05,614 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:30:05,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:30:06,702 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 315 [2021-07-13 19:30:06,882 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-07-13 19:30:07,068 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 331 [2021-07-13 19:30:07,294 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 341 [2021-07-13 19:30:07,729 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 439 [2021-07-13 19:30:08,119 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 423 [2021-07-13 19:30:08,333 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 343 [2021-07-13 19:30:08,500 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 295 [2021-07-13 19:30:08,609 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 255 [2021-07-13 19:30:10,104 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 231 [2021-07-13 19:30:10,334 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 291 [2021-07-13 19:30:10,601 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 320 [2021-07-13 19:30:10,961 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 374 [2021-07-13 19:30:11,425 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 417 [2021-07-13 19:30:11,626 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 294 [2021-07-13 19:30:12,700 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 242 [2021-07-13 19:30:13,388 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 220 [2021-07-13 19:30:13,644 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 330 [2021-07-13 19:30:14,005 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 402 [2021-07-13 19:30:14,440 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 559 DAG size of output: 432 [2021-07-13 19:30:15,016 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 646 DAG size of output: 497 [2021-07-13 19:30:16,158 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 924 DAG size of output: 729 [2021-07-13 19:30:17,631 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 1058 DAG size of output: 857 [2021-07-13 19:30:17,988 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 348 [2021-07-13 19:30:18,167 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 302 [2021-07-13 19:30:18,343 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 265 [2021-07-13 19:30:18,451 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 228 [2021-07-13 19:30:19,269 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 239 [2021-07-13 19:30:20,107 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 298 [2021-07-13 19:30:20,415 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 349 [2021-07-13 19:30:20,647 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 298 [2021-07-13 19:30:20,766 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 248 [2021-07-13 19:30:20,899 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 233 [2021-07-13 19:30:21,817 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 262 [2021-07-13 19:30:22,755 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 226 [2021-07-13 19:30:22,919 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 280 [2021-07-13 19:30:23,129 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 287 [2021-07-13 19:30:23,528 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 406 [2021-07-13 19:30:24,081 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 482 [2021-07-13 19:30:25,046 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 671 [2021-07-13 19:30:26,310 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 981 DAG size of output: 787 [2021-07-13 19:30:29,452 WARN L205 SmtUtils]: Spent 3.14 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1383 [2021-07-13 19:30:29,938 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 426 [2021-07-13 19:30:30,165 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 351 [2021-07-13 19:30:30,343 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 304 [2021-07-13 19:30:30,465 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 264 [2021-07-13 19:30:31,376 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 222 [2021-07-13 19:30:31,524 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 245 [2021-07-13 19:30:32,351 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 250 [2021-07-13 19:30:32,505 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 257 [2021-07-13 19:30:32,860 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 344 [2021-07-13 19:30:33,302 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 390 [2021-07-13 19:30:33,517 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 300 [2021-07-13 19:30:33,640 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 250 [2021-07-13 19:30:34,493 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 243 [2021-07-13 19:30:34,653 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 262 [2021-07-13 19:30:34,881 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 330 [2021-07-13 19:30:35,122 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 262 [2021-07-13 19:30:36,133 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 245 [2021-07-13 19:30:36,354 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 310 [2021-07-13 19:30:36,655 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 389 [2021-07-13 19:30:37,240 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 540 [2021-07-13 19:30:38,005 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 622 [2021-07-13 19:30:39,355 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 1030 DAG size of output: 835 [2021-07-13 19:30:41,090 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 1173 DAG size of output: 953 [2021-07-13 19:30:41,309 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 346 [2021-07-13 19:30:41,474 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 297 [2021-07-13 19:30:42,185 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 256 [2021-07-13 19:30:42,361 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 289 [2021-07-13 19:30:43,055 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 262 [2021-07-13 19:30:43,631 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-07-13 19:30:43,893 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 378 [2021-07-13 19:30:44,283 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 410 [2021-07-13 19:30:44,894 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 560 [2021-07-13 19:30:45,702 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 595 [2021-07-13 19:30:45,835 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 254 [2021-07-13 19:30:46,691 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 233 [2021-07-13 19:30:47,493 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 319 [2021-07-13 19:30:47,795 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 373 [2021-07-13 19:30:48,168 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 401 [2021-07-13 19:30:48,639 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 439 [2021-07-13 19:30:49,980 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1076 DAG size of output: 887 [2021-07-13 19:30:51,668 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 1212 DAG size of output: 1004 [2021-07-13 19:30:55,576 WARN L205 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 1979 DAG size of output: 1641 [2021-07-13 19:31:03,574 WARN L205 SmtUtils]: Spent 7.99 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-07-13 19:31:11,604 WARN L205 SmtUtils]: Spent 8.01 s on a formula simplification. DAG size of input: 3193 DAG size of output: 2569 [2021-07-13 19:31:21,125 WARN L205 SmtUtils]: Spent 9.51 s on a formula simplification. DAG size of input: 3202 DAG size of output: 2270 [2021-07-13 19:31:37,454 WARN L205 SmtUtils]: Spent 16.32 s on a formula simplification. DAG size of input: 2272 DAG size of output: 2759 [2021-07-13 19:31:38,955 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 1300 DAG size of output: 1279 [2021-07-13 19:31:42,009 WARN L205 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 829 DAG size of output: 1038 [2021-07-13 19:31:43,049 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 566 DAG size of output: 530 [2021-07-13 19:31:43,358 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 399 [2021-07-13 19:31:44,135 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 252 [2021-07-13 19:31:44,433 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 245 [2021-07-13 19:31:44,560 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 219 [2021-07-13 19:31:45,232 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 213 [2021-07-13 19:31:45,441 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 263 [2021-07-13 19:31:45,688 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 282 [2021-07-13 19:31:46,178 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 350 [2021-07-13 19:31:47,117 WARN L205 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 1044 DAG size of output: 557 [2021-07-13 19:31:47,408 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 608 DAG size of output: 521 [2021-07-13 19:31:48,027 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 459 [2021-07-13 19:31:48,380 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 269 [2021-07-13 19:31:48,598 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 303 [2021-07-13 19:31:48,810 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 275 [2021-07-13 19:31:49,434 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 397 [2021-07-13 19:31:50,873 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1554 DAG size of output: 803 [2021-07-13 19:31:55,968 WARN L205 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-07-13 19:32:01,042 WARN L205 SmtUtils]: Spent 5.06 s on a formula simplification. DAG size of input: 3037 DAG size of output: 1686 [2021-07-13 19:32:06,370 WARN L205 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 3039 DAG size of output: 1662 [2021-07-13 19:32:06,801 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1662 [2021-07-13 19:32:06,967 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 781 [2021-07-13 19:32:07,239 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 298 [2021-07-13 19:32:08,776 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 207 [2021-07-13 19:32:09,082 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 251 [2021-07-13 19:32:09,385 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 375 [2021-07-13 19:32:10,275 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 263 [2021-07-13 19:32:10,767 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 794 DAG size of output: 508 [2021-07-13 19:32:13,516 WARN L205 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 986 DAG size of output: 1338 [2021-07-13 19:32:14,031 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 749 [2021-07-13 19:32:14,421 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 305 [2021-07-13 19:32:15,331 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 211 [2021-07-13 19:32:16,193 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 224 [2021-07-13 19:32:16,331 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 229 [2021-07-13 19:32:16,774 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 484 [2021-07-13 19:32:17,156 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 231 [2021-07-13 19:32:17,482 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 217 [2021-07-13 19:32:17,764 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 321 [2021-07-13 19:32:18,225 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 399 [2021-07-13 19:32:18,573 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 723 DAG size of output: 686 [2021-07-13 19:32:18,841 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 361 [2021-07-13 19:32:19,747 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 224 [2021-07-13 19:32:20,186 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 403 [2021-07-13 19:32:21,205 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 281 [2021-07-13 19:32:21,333 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 249 [2021-07-13 19:32:21,895 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 347 [2021-07-13 19:32:22,286 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 415 [2021-07-13 19:32:23,212 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 1350 DAG size of output: 700 [2021-07-13 19:32:24,816 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-07-13 19:32:26,410 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 2054 DAG size of output: 1054 [2021-07-13 19:32:27,534 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 2056 DAG size of output: 695 [2021-07-13 19:32:28,586 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 697 DAG size of output: 852 [2021-07-13 19:32:28,706 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 214 [2021-07-13 19:32:29,434 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 541 [2021-07-13 19:32:29,805 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 496 DAG size of output: 313 [2021-07-13 19:32:30,127 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-07-13 19:32:30,455 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 380 [2021-07-13 19:32:30,831 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 371 [2021-07-13 19:32:31,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:32:31,467 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:32:31,467 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:32:31,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:32:32,215 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 453 DAG size of output: 298 [2021-07-13 19:32:32,347 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-07-13 19:32:32,477 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 312 [2021-07-13 19:32:32,635 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 312 [2021-07-13 19:32:32,874 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 396 [2021-07-13 19:32:33,007 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 309 [2021-07-13 19:32:34,134 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 239 [2021-07-13 19:32:34,326 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 308 [2021-07-13 19:32:35,451 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 308 [2021-07-13 19:32:36,326 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 447 [2021-07-13 19:32:36,674 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 721 DAG size of output: 505 [2021-07-13 19:32:37,325 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 1067 DAG size of output: 653 [2021-07-13 19:32:38,342 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 315 [2021-07-13 19:32:38,568 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 343 [2021-07-13 19:32:39,156 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 245 [2021-07-13 19:32:39,299 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 271 [2021-07-13 19:32:39,720 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 581 DAG size of output: 495 [2021-07-13 19:32:40,323 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 250 [2021-07-13 19:32:40,466 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 278 [2021-07-13 19:32:41,161 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 383 [2021-07-13 19:32:41,431 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 406 [2021-07-13 19:32:42,254 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 740 [2021-07-13 19:32:43,545 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 257 [2021-07-13 19:32:43,713 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 302 [2021-07-13 19:32:44,019 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 450 [2021-07-13 19:32:44,397 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 602 DAG size of output: 489 [2021-07-13 19:32:45,372 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 322 [2021-07-13 19:32:45,583 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 351 [2021-07-13 19:32:45,810 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 378 [2021-07-13 19:32:46,527 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 913 DAG size of output: 704 [2021-07-13 19:32:48,290 WARN L205 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 1540 DAG size of output: 1209 [2021-07-13 19:32:51,147 WARN L205 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 2433 DAG size of output: 1679 [2021-07-13 19:32:54,474 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-07-13 19:32:57,771 WARN L205 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 2445 DAG size of output: 1690 [2021-07-13 19:33:01,125 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 2450 DAG size of output: 1487 [2021-07-13 19:33:06,068 WARN L205 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 1489 DAG size of output: 1519 [2021-07-13 19:33:06,314 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1328 [2021-07-13 19:33:06,466 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-07-13 19:33:07,295 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 474 [2021-07-13 19:33:08,192 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 349 [2021-07-13 19:33:08,347 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 366 [2021-07-13 19:33:08,636 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 389 [2021-07-13 19:33:08,912 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 487 [2021-07-13 19:33:09,348 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 1443 DAG size of output: 594 [2021-07-13 19:33:09,877 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 1486 DAG size of output: 610 [2021-07-13 19:33:10,553 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-07-13 19:33:11,232 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 684 [2021-07-13 19:33:12,031 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 683 [2021-07-13 19:33:12,526 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 451 [2021-07-13 19:33:13,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:33:13,797 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:33:13,797 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:33:13,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:33:14,476 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 316 [2021-07-13 19:33:14,622 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 329 [2021-07-13 19:33:14,789 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-07-13 19:33:14,953 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 341 [2021-07-13 19:33:15,165 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 331 [2021-07-13 19:33:15,381 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 381 [2021-07-13 19:33:15,616 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 361 [2021-07-13 19:33:15,772 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 306 [2021-07-13 19:33:15,995 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 287 [2021-07-13 19:33:16,326 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 298 [2021-07-13 19:33:16,662 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 351 [2021-07-13 19:33:16,858 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 311 [2021-07-13 19:33:17,214 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 285 [2021-07-13 19:33:17,455 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 285 [2021-07-13 19:33:17,585 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 298 [2021-07-13 19:33:17,788 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 367 [2021-07-13 19:33:18,197 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 688 DAG size of output: 491 [2021-07-13 19:33:18,612 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 494 [2021-07-13 19:33:18,817 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 269 [2021-07-13 19:33:18,926 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 226 [2021-07-13 19:33:19,053 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 199 [2021-07-13 19:33:20,159 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 430 DAG size of output: 292 [2021-07-13 19:33:20,821 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-07-13 19:33:21,479 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 652 [2021-07-13 19:33:22,236 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 985 DAG size of output: 651 [2021-07-13 19:33:23,063 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 691 [2021-07-13 19:33:24,490 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 234 [2021-07-13 19:33:24,822 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 321 [2021-07-13 19:33:25,498 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 621 [2021-07-13 19:33:26,316 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 211 [2021-07-13 19:33:26,729 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 284 [2021-07-13 19:33:26,952 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 289 [2021-07-13 19:33:27,679 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 708 DAG size of output: 396 [2021-07-13 19:33:28,104 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-07-13 19:33:28,533 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 466 [2021-07-13 19:33:29,016 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 1031 DAG size of output: 465 [2021-07-13 19:33:29,157 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 278 [2021-07-13 19:33:29,293 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 285 [2021-07-13 19:33:29,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:33:29,584 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:33:29,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:29,584 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:33:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:29,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735068351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:29,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:29,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:33:29,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706090095] [2021-07-13 19:33:29,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:33:29,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:29,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:33:29,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:29,612 INFO L87 Difference]: Start difference. First operand 947 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:30,071 INFO L93 Difference]: Finished difference Result 1018 states and 3228 transitions. [2021-07-13 19:33:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:33:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:33:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:30,073 INFO L225 Difference]: With dead ends: 1018 [2021-07-13 19:33:30,073 INFO L226 Difference]: Without dead ends: 1008 [2021-07-13 19:33:30,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:33:30,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-07-13 19:33:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 951. [2021-07-13 19:33:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:30,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-07-13 19:33:30,084 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-07-13 19:33:30,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:30,084 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-07-13 19:33:30,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-07-13 19:33:30,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:33:30,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:30,085 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:30,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20630 [2021-07-13 19:33:30,286 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash 754746123, now seen corresponding path program 206 times [2021-07-13 19:33:30,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:30,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319877825] [2021-07-13 19:33:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:30,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:30,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319877825] [2021-07-13 19:33:30,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319877825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:30,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392981187] [2021-07-13 19:33:30,385 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 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 [2021-07-13 19:33:30,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:33:30,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:30,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:33:30,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:30,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:30,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:33:31,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:33:31,891 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:33:31,891 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:33:31,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:33:32,526 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-07-13 19:33:32,673 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 311 [2021-07-13 19:33:33,449 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 219 [2021-07-13 19:33:33,620 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 280 [2021-07-13 19:33:33,760 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 310 [2021-07-13 19:33:33,878 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 246 [2021-07-13 19:33:34,888 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 264 [2021-07-13 19:33:35,066 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 284 [2021-07-13 19:33:35,294 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 307 [2021-07-13 19:33:35,655 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 430 [2021-07-13 19:33:36,180 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-07-13 19:33:36,697 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 458 [2021-07-13 19:33:37,322 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 466 [2021-07-13 19:33:37,743 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 328 [2021-07-13 19:33:38,498 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 190 [2021-07-13 19:33:38,658 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 217 [2021-07-13 19:33:38,879 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2021-07-13 19:33:39,304 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 190 [2021-07-13 19:33:40,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:33:40,487 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:33:40,487 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:33:40,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:33:41,792 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 263 [2021-07-13 19:33:41,970 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 285 [2021-07-13 19:33:43,167 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 252 [2021-07-13 19:33:43,572 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 424 [2021-07-13 19:33:44,793 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 266 [2021-07-13 19:33:45,718 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 291 [2021-07-13 19:33:46,090 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 429 [2021-07-13 19:33:46,991 WARN L205 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 1007 DAG size of output: 696 [2021-07-13 19:33:48,057 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1051 DAG size of output: 720 [2021-07-13 19:33:49,329 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-07-13 19:33:50,599 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1093 DAG size of output: 752 [2021-07-13 19:33:51,688 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 1098 DAG size of output: 513 [2021-07-13 19:33:52,089 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 458 [2021-07-13 19:33:52,321 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 276 [2021-07-13 19:33:52,965 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 243 [2021-07-13 19:33:53,106 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-07-13 19:33:53,247 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 267 [2021-07-13 19:33:53,426 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 271 [2021-07-13 19:33:53,604 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 280 [2021-07-13 19:33:53,725 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 193 [2021-07-13 19:33:54,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:33:54,495 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:33:54,495 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:33:54,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:33:55,649 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 301 DAG size of output: 230 [2021-07-13 19:33:55,800 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 277 [2021-07-13 19:33:56,597 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 243 [2021-07-13 19:33:56,897 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-07-13 19:33:57,203 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 426 [2021-07-13 19:33:57,576 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 571 DAG size of output: 430 [2021-07-13 19:33:57,898 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 422 [2021-07-13 19:33:58,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:33:58,587 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:33:58,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:33:58,588 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:33:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:58,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392981187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:58,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:33:58,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:33:58,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151322679] [2021-07-13 19:33:58,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:33:58,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:33:58,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:33:58,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:33:58,615 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:33:59,129 INFO L93 Difference]: Finished difference Result 1044 states and 3286 transitions. [2021-07-13 19:33:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:33:59,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:33:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:33:59,131 INFO L225 Difference]: With dead ends: 1044 [2021-07-13 19:33:59,131 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 19:33:59,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:33:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 19:33:59,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 951. [2021-07-13 19:33:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 3.2505263157894735) internal successors, (3088), 950 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 3088 transitions. [2021-07-13 19:33:59,142 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 3088 transitions. Word has length 20 [2021-07-13 19:33:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:33:59,142 INFO L482 AbstractCegarLoop]: Abstraction has 951 states and 3088 transitions. [2021-07-13 19:33:59,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:33:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 3088 transitions. [2021-07-13 19:33:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:33:59,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:33:59,144 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:33:59,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28098 [2021-07-13 19:33:59,360 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:33:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:33:59,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1412276551, now seen corresponding path program 207 times [2021-07-13 19:33:59,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:33:59,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885194133] [2021-07-13 19:33:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:33:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:33:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:33:59,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:33:59,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885194133] [2021-07-13 19:33:59,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885194133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:33:59,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278534746] [2021-07-13 19:33:59,458 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 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 [2021-07-13 19:33:59,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:33:59,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:33:59,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:33:59,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:33:59,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:33:59,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:34:00,577 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 316 [2021-07-13 19:34:00,750 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 277 [2021-07-13 19:34:00,883 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 274 [2021-07-13 19:34:02,054 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 272 [2021-07-13 19:34:02,190 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 266 [2021-07-13 19:34:02,364 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 330 [2021-07-13 19:34:02,630 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 433 [2021-07-13 19:34:02,980 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 736 DAG size of output: 517 [2021-07-13 19:34:03,184 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 216 [2021-07-13 19:34:04,018 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 321 [2021-07-13 19:34:04,196 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 339 [2021-07-13 19:34:04,847 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-07-13 19:34:05,507 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 744 [2021-07-13 19:34:06,236 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 1149 DAG size of output: 749 [2021-07-13 19:34:06,641 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 513 [2021-07-13 19:34:06,777 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 281 [2021-07-13 19:34:07,434 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 477 [2021-07-13 19:34:08,107 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 282 [2021-07-13 19:34:08,598 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 258 [2021-07-13 19:34:08,771 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-07-13 19:34:08,947 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 324 [2021-07-13 19:34:09,135 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 630 DAG size of output: 328 [2021-07-13 19:34:09,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:09,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:09,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:34:09,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-13 19:34:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:09,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278534746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:09,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:09,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:34:09,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130767757] [2021-07-13 19:34:09,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:34:09,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:09,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:34:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:09,447 INFO L87 Difference]: Start difference. First operand 951 states and 3088 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:09,833 INFO L93 Difference]: Finished difference Result 1074 states and 3428 transitions. [2021-07-13 19:34:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:34:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:34:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:09,835 INFO L225 Difference]: With dead ends: 1074 [2021-07-13 19:34:09,835 INFO L226 Difference]: Without dead ends: 1058 [2021-07-13 19:34:09,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:34:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-07-13 19:34:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1006. [2021-07-13 19:34:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.261691542288557) internal successors, (3278), 1005 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3278 transitions. [2021-07-13 19:34:09,847 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3278 transitions. Word has length 20 [2021-07-13 19:34:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:09,847 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3278 transitions. [2021-07-13 19:34:09,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3278 transitions. [2021-07-13 19:34:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:34:09,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:09,848 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:10,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29718,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:10,049 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -553402021, now seen corresponding path program 208 times [2021-07-13 19:34:10,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:10,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139094516] [2021-07-13 19:34:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:10,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:10,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139094516] [2021-07-13 19:34:10,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139094516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:10,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755680852] [2021-07-13 19:34:10,148 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 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 [2021-07-13 19:34:10,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:34:10,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:10,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:34:10,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:10,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:10,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:34:11,429 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 298 [2021-07-13 19:34:11,531 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 274 [2021-07-13 19:34:12,440 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 292 [2021-07-13 19:34:13,241 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-07-13 19:34:13,433 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 725 DAG size of output: 414 [2021-07-13 19:34:13,640 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 729 DAG size of output: 418 [2021-07-13 19:34:14,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:14,894 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:34:14,895 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:34:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:34:15,553 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 291 [2021-07-13 19:34:16,457 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 297 [2021-07-13 19:34:16,670 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-07-13 19:34:16,887 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 362 [2021-07-13 19:34:17,133 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 449 DAG size of output: 345 [2021-07-13 19:34:17,574 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 363 [2021-07-13 19:34:17,751 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 242 [2021-07-13 19:34:18,048 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 243 [2021-07-13 19:34:18,442 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-07-13 19:34:18,603 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 275 [2021-07-13 19:34:18,778 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 280 [2021-07-13 19:34:18,929 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 272 [2021-07-13 19:34:19,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:34:20,116 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:34:20,117 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:34:20,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:34:20,840 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 238 [2021-07-13 19:34:20,947 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 246 [2021-07-13 19:34:21,071 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 311 [2021-07-13 19:34:21,240 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 307 [2021-07-13 19:34:21,477 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 278 [2021-07-13 19:34:22,027 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 331 [2021-07-13 19:34:23,037 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 344 [2021-07-13 19:34:23,334 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 639 DAG size of output: 487 [2021-07-13 19:34:23,701 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 527 [2021-07-13 19:34:24,248 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-07-13 19:34:24,654 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 791 DAG size of output: 555 [2021-07-13 19:34:25,153 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 802 DAG size of output: 565 [2021-07-13 19:34:25,349 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 670 [2021-07-13 19:34:25,806 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 419 [2021-07-13 19:34:26,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:34:26,864 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:34:26,864 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:34:26,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:34:27,922 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 258 [2021-07-13 19:34:28,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:34:28,596 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:34:28,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:34:28,596 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:34:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:28,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755680852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:28,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:34:28,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:34:28,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153384816] [2021-07-13 19:34:28,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:34:28,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:34:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:34:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:34:28,624 INFO L87 Difference]: Start difference. First operand 1006 states and 3278 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:34:29,320 INFO L93 Difference]: Finished difference Result 1179 states and 3670 transitions. [2021-07-13 19:34:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:34:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:34:29,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:34:29,322 INFO L225 Difference]: With dead ends: 1179 [2021-07-13 19:34:29,322 INFO L226 Difference]: Without dead ends: 1153 [2021-07-13 19:34:29,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:34:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-07-13 19:34:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1019. [2021-07-13 19:34:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.2652259332023577) internal successors, (3324), 1018 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3324 transitions. [2021-07-13 19:34:29,333 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3324 transitions. Word has length 20 [2021-07-13 19:34:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:34:29,333 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3324 transitions. [2021-07-13 19:34:29,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:34:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3324 transitions. [2021-07-13 19:34:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:34:29,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:34:29,335 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:34:29,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30435,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:34:29,535 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:34:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:34:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1157211287, now seen corresponding path program 209 times [2021-07-13 19:34:29,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:34:29,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491371417] [2021-07-13 19:34:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:34:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:34:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:34:29,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:34:29,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491371417] [2021-07-13 19:34:29,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491371417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:34:29,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32277728] [2021-07-13 19:34:29,634 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 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 [2021-07-13 19:34:29,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:34:29,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:34:29,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:34:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:34:30,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:34:30,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:34:31,277 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 253 [2021-07-13 19:34:31,466 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 325 [2021-07-13 19:34:31,709 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-07-13 19:34:31,955 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 364 [2021-07-13 19:34:32,230 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 371 [2021-07-13 19:34:32,577 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 425 [2021-07-13 19:34:32,812 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 341 [2021-07-13 19:34:33,729 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-07-13 19:34:33,911 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 298 [2021-07-13 19:34:34,091 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 301 [2021-07-13 19:34:34,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:34:34,722 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:34:34,723 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:34:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:34:35,610 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 350 [2021-07-13 19:34:35,743 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 370 [2021-07-13 19:34:35,910 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 397 [2021-07-13 19:34:36,127 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 419 [2021-07-13 19:34:36,354 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 440 [2021-07-13 19:34:36,842 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 595 DAG size of output: 457 [2021-07-13 19:34:37,180 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-07-13 19:34:37,513 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 482 [2021-07-13 19:34:37,910 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 488 [2021-07-13 19:34:38,161 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 489 [2021-07-13 19:34:38,494 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 381 [2021-07-13 19:34:38,689 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 351 [2021-07-13 19:34:38,922 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 348 [2021-07-13 19:34:39,300 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 300 [2021-07-13 19:34:39,669 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 250 [2021-07-13 19:34:39,993 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 316 [2021-07-13 19:34:40,445 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 582 DAG size of output: 341 [2021-07-13 19:34:40,721 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 606 DAG size of output: 364 [2021-07-13 19:34:41,028 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 381 [2021-07-13 19:34:41,351 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 394 [2021-07-13 19:34:41,737 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 418 [2021-07-13 19:34:42,178 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-07-13 19:34:42,620 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 679 DAG size of output: 429 [2021-07-13 19:34:43,141 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 430 [2021-07-13 19:34:44,011 WARN L205 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 468 [2021-07-13 19:34:44,418 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 425 [2021-07-13 19:34:44,698 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 356 [2021-07-13 19:34:44,921 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 349 [2021-07-13 19:34:45,117 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 334 [2021-07-13 19:34:45,886 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 238 [2021-07-13 19:34:46,046 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 250 [2021-07-13 19:34:46,240 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 261 [2021-07-13 19:34:46,417 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 286 [2021-07-13 19:34:46,653 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 287 [2021-07-13 19:34:46,802 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 275 [2021-07-13 19:34:46,922 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 210 [2021-07-13 19:34:47,866 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-07-13 19:34:48,206 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 317 [2021-07-13 19:34:48,513 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 276 [2021-07-13 19:34:49,027 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 299 [2021-07-13 19:34:49,270 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 263 [2021-07-13 19:34:49,878 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 203 [2021-07-13 19:34:50,047 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-07-13 19:34:50,207 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 233 [2021-07-13 19:34:50,356 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 206 [2021-07-13 19:34:50,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:34:51,140 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:34:51,141 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:34:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:34:52,259 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-07-13 19:34:52,474 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 476 DAG size of output: 442 [2021-07-13 19:34:52,718 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 370 [2021-07-13 19:34:53,106 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 473 [2021-07-13 19:34:53,378 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 292 [2021-07-13 19:34:54,354 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 504 DAG size of output: 308 [2021-07-13 19:34:54,883 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 567 [2021-07-13 19:34:55,210 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 350 [2021-07-13 19:34:56,166 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 282 [2021-07-13 19:34:56,338 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 292 [2021-07-13 19:34:56,565 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 365 [2021-07-13 19:34:56,937 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-07-13 19:34:57,307 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 456 [2021-07-13 19:34:57,737 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 968 DAG size of output: 445 [2021-07-13 19:34:58,197 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 447 DAG size of output: 589 [2021-07-13 19:34:58,555 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 460 [2021-07-13 19:34:58,781 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 232 [2021-07-13 19:34:59,580 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 473 DAG size of output: 268 [2021-07-13 19:34:59,872 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-07-13 19:35:00,164 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 405 [2021-07-13 19:35:00,467 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 635 DAG size of output: 382 [2021-07-13 19:35:00,694 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 346 [2021-07-13 19:35:01,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:35:01,939 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:35:01,939 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:35:01,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:35:03,359 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 272 [2021-07-13 19:35:03,501 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 311 [2021-07-13 19:35:03,993 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 358 [2021-07-13 19:35:04,248 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-07-13 19:35:04,506 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 408 [2021-07-13 19:35:04,805 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 414 [2021-07-13 19:35:04,990 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 451 [2021-07-13 19:35:05,194 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 340 [2021-07-13 19:35:05,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:35:05,767 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:35:05,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:35:05,767 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:35:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:05,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32277728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:05,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:05,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:35:05,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063333047] [2021-07-13 19:35:05,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:35:05,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:05,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:35:05,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:05,795 INFO L87 Difference]: Start difference. First operand 1019 states and 3324 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:06,301 INFO L93 Difference]: Finished difference Result 1092 states and 3484 transitions. [2021-07-13 19:35:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:35:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:35:06,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:06,303 INFO L225 Difference]: With dead ends: 1092 [2021-07-13 19:35:06,303 INFO L226 Difference]: Without dead ends: 1082 [2021-07-13 19:35:06,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:35:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-07-13 19:35:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-07-13 19:35:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-07-13 19:35:06,314 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-07-13 19:35:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:06,315 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-07-13 19:35:06,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-07-13 19:35:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:35:06,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:06,316 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:06,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31818,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:35:06,517 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:06,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1648351013, now seen corresponding path program 210 times [2021-07-13 19:35:06,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:06,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148755512] [2021-07-13 19:35:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:06,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:06,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148755512] [2021-07-13 19:35:06,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148755512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:06,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040903836] [2021-07-13 19:35:06,616 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 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 [2021-07-13 19:35:06,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:35:06,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:35:06,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:35:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:07,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:07,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:35:08,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:08,710 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:35:08,711 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:35:08,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:35:09,753 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 361 [2021-07-13 19:35:09,945 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-07-13 19:35:10,148 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 378 [2021-07-13 19:35:10,392 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 555 DAG size of output: 388 [2021-07-13 19:35:10,687 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 494 [2021-07-13 19:35:10,899 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 378 [2021-07-13 19:35:11,716 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 267 [2021-07-13 19:35:11,883 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 316 [2021-07-13 19:35:12,013 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 301 [2021-07-13 19:35:12,613 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 236 [2021-07-13 19:35:12,839 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 231 [2021-07-13 19:35:13,085 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-07-13 19:35:13,321 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 345 [2021-07-13 19:35:13,621 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 353 [2021-07-13 19:35:13,758 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 356 [2021-07-13 19:35:14,054 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-07-13 19:35:14,229 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 352 [2021-07-13 19:35:15,621 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 273 [2021-07-13 19:35:15,823 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 294 [2021-07-13 19:35:16,078 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 343 [2021-07-13 19:35:16,395 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-07-13 19:35:16,716 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 355 [2021-07-13 19:35:17,031 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 327 [2021-07-13 19:35:17,445 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 407 [2021-07-13 19:35:17,867 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 286 [2021-07-13 19:35:18,039 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 266 [2021-07-13 19:35:18,757 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 229 [2021-07-13 19:35:19,005 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-07-13 19:35:19,257 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 319 [2021-07-13 19:35:19,519 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 318 [2021-07-13 19:35:19,869 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 371 [2021-07-13 19:35:19,999 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 293 [2021-07-13 19:35:20,787 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 309 [2021-07-13 19:35:20,976 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-07-13 19:35:21,164 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 357 [2021-07-13 19:35:21,389 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 362 [2021-07-13 19:35:21,581 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 265 [2021-07-13 19:35:21,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 19:35:22,318 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 167 [2021-07-13 19:35:22,319 INFO L354 Elim1Store]: treesize reduction 68, result has 81.2 percent of original size [2021-07-13 19:35:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 43 treesize of output 326 [2021-07-13 19:35:22,945 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 249 [2021-07-13 19:35:23,082 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 288 [2021-07-13 19:35:23,952 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-07-13 19:35:24,077 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 239 [2021-07-13 19:35:24,231 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 217 [2021-07-13 19:35:24,352 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 267 [2021-07-13 19:35:25,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 19:35:25,660 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 147 [2021-07-13 19:35:25,660 INFO L354 Elim1Store]: treesize reduction 32, result has 88.9 percent of original size [2021-07-13 19:35:25,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 41 treesize of output 287 [2021-07-13 19:35:26,853 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 219 [2021-07-13 19:35:27,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 19:35:27,548 INFO L628 ElimStorePlain]: treesize reduction 56, result has 21.1 percent of original size [2021-07-13 19:35:27,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:35:27,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:190, output treesize:15 [2021-07-13 19:35:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:27,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040903836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:27,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:35:27,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 19:35:27,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31187328] [2021-07-13 19:35:27,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:35:27,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:35:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:35:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:35:27,593 INFO L87 Difference]: Start difference. First operand 1022 states and 3333 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:35:28,133 INFO L93 Difference]: Finished difference Result 1112 states and 3526 transitions. [2021-07-13 19:35:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:35:28,133 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 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 20 [2021-07-13 19:35:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:35:28,134 INFO L225 Difference]: With dead ends: 1112 [2021-07-13 19:35:28,134 INFO L226 Difference]: Without dead ends: 1102 [2021-07-13 19:35:28,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 531.5ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:35:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-07-13 19:35:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1022. [2021-07-13 19:35:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.2644466209598435) internal successors, (3333), 1021 states have internal predecessors, (3333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3333 transitions. [2021-07-13 19:35:28,147 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3333 transitions. Word has length 20 [2021-07-13 19:35:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:35:28,147 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3333 transitions. [2021-07-13 19:35:28,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:35:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3333 transitions. [2021-07-13 19:35:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:35:28,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:35:28,149 INFO L508 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:35:28,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34189 [2021-07-13 19:35:28,349 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:35:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:35:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1573530903, now seen corresponding path program 211 times [2021-07-13 19:35:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:35:28,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800743479] [2021-07-13 19:35:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:35:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:35:28,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:35:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800743479] [2021-07-13 19:35:28,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800743479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:35:28,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668824698] [2021-07-13 19:35:28,449 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 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 [2021-07-13 19:35:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:35:28,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:35:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:35:28,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:35:28,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-13 19:35:29,678 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 260 [2021-07-13 19:35:29,938 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 351 [2021-07-13 19:35:30,046 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 265 [2021-07-13 19:35:30,214 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 253 [2021-07-13 19:35:30,794 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 296 [2021-07-13 19:35:31,183 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 543 DAG size of output: 361 [2021-07-13 19:35:31,399 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 591 DAG size of output: 390 [2021-07-13 19:35:31,651 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 683 DAG size of output: 434 [2021-07-13 19:35:31,858 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 286 [2021-07-13 19:35:32,917 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 249 [2021-07-13 19:35:33,204 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 289 [2021-07-13 19:35:33,422 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 372 [2021-07-13 19:35:33,963 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 1157 DAG size of output: 652 [2021-07-13 19:35:34,630 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-07-13 19:35:35,299 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 1229 DAG size of output: 708 [2021-07-13 19:35:36,033 WARN L205 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 715 [2021-07-13 19:35:37,441 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 717 DAG size of output: 423 [2021-07-13 19:35:38,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:35:38,676 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 209 [2021-07-13 19:35:38,677 INFO L354 Elim1Store]: treesize reduction 68, result has 84.6 percent of original size [2021-07-13 19:35:38,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 21 new quantified variables, introduced 55 case distinctions, treesize of input 45 treesize of output 409 [2021-07-13 19:35:39,659 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 331 [2021-07-13 19:35:39,832 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 481 [2021-07-13 19:35:40,054 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 501 [2021-07-13 19:35:40,319 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 681 DAG size of output: 529 [2021-07-13 19:35:40,641 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 544 [2021-07-13 19:35:41,685 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 414 [2021-07-13 19:35:41,871 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 436 [2021-07-13 19:35:42,096 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 615 DAG size of output: 452 [2021-07-13 19:35:42,712 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-07-13 19:35:43,321 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 819 [2021-07-13 19:35:44,063 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 807 [2021-07-13 19:35:45,088 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 809 DAG size of output: 994 [2021-07-13 19:35:45,974 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 881 [2021-07-13 19:35:46,600 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 638 DAG size of output: 648 [2021-07-13 19:35:46,825 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 566 [2021-07-13 19:35:47,130 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 414 [2021-07-13 19:35:47,280 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 388 [2021-07-13 19:35:47,456 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 369 [2021-07-13 19:35:48,041 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 240 [2021-07-13 19:35:48,159 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 268 [2021-07-13 19:35:48,832 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 281 [2021-07-13 19:35:49,001 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 300 [2021-07-13 19:35:49,341 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 510 DAG size of output: 367 [2021-07-13 19:35:49,914 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 690 DAG size of output: 551 [2021-07-13 19:35:50,747 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 831 DAG size of output: 677 [2021-07-13 19:35:51,466 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 242 [2021-07-13 19:35:51,996 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 240 [2021-07-13 19:35:52,128 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 259 [2021-07-13 19:35:52,405 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 320 [2021-07-13 19:35:52,786 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 397 [2021-07-13 19:35:53,242 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 418 [2021-07-13 19:35:53,841 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 654 DAG size of output: 507 [2021-07-13 19:35:55,472 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1053 DAG size of output: 866 [2021-07-13 19:35:56,159 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 542 DAG size of output: 607 [2021-07-13 19:35:56,622 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 545 [2021-07-13 19:35:56,839 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-07-13 19:35:57,622 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 424 DAG size of output: 343 [2021-07-13 19:35:58,092 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 291 [2021-07-13 19:35:58,488 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 451 [2021-07-13 19:35:58,975 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 472 [2021-07-13 19:35:59,573 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 587 DAG size of output: 488 [2021-07-13 19:36:00,585 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 885 DAG size of output: 764 [2021-07-13 19:36:01,028 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 549 [2021-07-13 19:36:01,228 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 345 [2021-07-13 19:36:01,899 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 278 [2021-07-13 19:36:02,563 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 253 [2021-07-13 19:36:02,941 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 498 DAG size of output: 418 [2021-07-13 19:36:03,434 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 446 [2021-07-13 19:36:04,005 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 474 [2021-07-13 19:36:04,807 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 568 [2021-07-13 19:36:06,067 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 994 DAG size of output: 861 [2021-07-13 19:36:08,698 WARN L205 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 1302 DAG size of output: 1160 [2021-07-13 19:36:13,299 WARN L205 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 1780 DAG size of output: 1685 [2021-07-13 19:36:13,516 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 348 [2021-07-13 19:36:13,837 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 375 [2021-07-13 19:36:14,044 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 333 [2021-07-13 19:36:14,343 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 349 [2021-07-13 19:36:14,934 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 270 [2021-07-13 19:36:15,126 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 327 [2021-07-13 19:36:15,282 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 287 [2021-07-13 19:36:15,795 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 327 [2021-07-13 19:36:16,155 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 477 [2021-07-13 19:36:16,598 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 562 DAG size of output: 495 [2021-07-13 19:36:17,295 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 552 [2021-07-13 19:36:18,243 WARN L205 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 634 [2021-07-13 19:36:18,603 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 359 [2021-07-13 19:36:18,777 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 316 [2021-07-13 19:36:18,893 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 276 [2021-07-13 19:36:19,035 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 283 [2021-07-13 19:36:19,277 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 250 [2021-07-13 19:36:19,484 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 359 [2021-07-13 19:36:19,861 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 593 DAG size of output: 503 [2021-07-13 19:36:20,336 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 525 [2021-07-13 19:36:20,912 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 533 [2021-07-13 19:36:21,374 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 259 [2021-07-13 19:36:21,496 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 267 [2021-07-13 19:36:22,326 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 587 [2021-07-13 19:36:24,391 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 996 DAG size of output: 805 [2021-07-13 19:36:24,505 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 256 [2021-07-13 19:36:24,716 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 265 [2021-07-13 19:36:25,236 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 215 [2021-07-13 19:36:25,827 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 264 [2021-07-13 19:36:26,134 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 304 [2021-07-13 19:36:26,654 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 238 [2021-07-13 19:36:26,847 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 257 [2021-07-13 19:36:26,981 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 273 [2021-07-13 19:36:27,147 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 281 [2021-07-13 19:36:27,713 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 561 DAG size of output: 426 [2021-07-13 19:36:29,941 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 1211 DAG size of output: 891 [2021-07-13 19:36:37,084 WARN L205 SmtUtils]: Spent 7.14 s on a formula simplification. DAG size of input: 2487 DAG size of output: 2146 [2021-07-13 19:36:37,992 WARN L205 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 675 DAG size of output: 716 [2021-07-13 19:36:38,197 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 369 [2021-07-13 19:36:38,499 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 395 [2021-07-13 19:36:38,810 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 382 [2021-07-13 19:36:39,019 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 370 [2021-07-13 19:36:39,247 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 342 [2021-07-13 19:36:39,725 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 267 [2021-07-13 19:36:39,881 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 275 [2021-07-13 19:36:40,152 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 428 [2021-07-13 19:36:40,631 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 586 [2021-07-13 19:36:40,877 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 353 [2021-07-13 19:36:41,151 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 352 [2021-07-13 19:36:41,814 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 325 [2021-07-13 19:36:42,178 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 470 [2021-07-13 19:36:43,199 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 813 DAG size of output: 755 [2021-07-13 19:36:43,369 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 343 [2021-07-13 19:36:43,612 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 363 [2021-07-13 19:36:43,986 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 253 [2021-07-13 19:36:44,125 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 273 [2021-07-13 19:36:44,245 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 332 [2021-07-13 19:36:44,621 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 270 [2021-07-13 19:36:44,858 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 429 [2021-07-13 19:36:45,176 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 455 [2021-07-13 19:36:45,720 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 549 [2021-07-13 19:36:46,467 WARN L205 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 731 DAG size of output: 649 [2021-07-13 19:36:47,385 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 765 DAG size of output: 671 [2021-07-13 19:36:49,601 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 1203 DAG size of output: 1037 [2021-07-13 19:36:49,714 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 255 [2021-07-13 19:36:49,864 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 266 [2021-07-13 19:36:50,396 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 254 [2021-07-13 19:36:50,528 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 262 [2021-07-13 19:36:51,134 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 246 [2021-07-13 19:36:51,277 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 254 [2021-07-13 19:36:51,461 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 283 [2021-07-13 19:36:51,850 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 364 [2021-07-13 19:36:52,039 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 264 [2021-07-13 19:36:52,612 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 247 [2021-07-13 19:36:52,747 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 268 [2021-07-13 19:36:53,311 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 245 [2021-07-13 19:36:53,443 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 274 [2021-07-13 19:36:53,772 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 369 [2021-07-13 19:36:54,213 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 530 DAG size of output: 409 [2021-07-13 19:36:55,188 WARN L205 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 721 DAG size of output: 540 [2021-07-13 19:36:58,140 WARN L205 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 1571 DAG size of output: 1210 [2021-07-13 19:36:58,297 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 563 [2021-07-13 19:36:59,157 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 270 [2021-07-13 19:36:59,285 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 285 [2021-07-13 19:36:59,921 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 278 [2021-07-13 19:37:00,104 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 301 [2021-07-13 19:37:00,474 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 377 [2021-07-13 19:37:00,960 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 453 [2021-07-13 19:37:01,660 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-07-13 19:37:02,347 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 350 [2021-07-13 19:37:02,722 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 432 [2021-07-13 19:37:03,201 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 483 [2021-07-13 19:37:03,807 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 624 DAG size of output: 506 [2021-07-13 19:37:05,021 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 856 DAG size of output: 678 [2021-07-13 19:37:05,234 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 385 [2021-07-13 19:37:05,410 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 399 [2021-07-13 19:37:06,102 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 312 [2021-07-13 19:37:06,594 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 208 [2021-07-13 19:37:06,786 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 247 [2021-07-13 19:37:07,251 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 458 [2021-07-13 19:37:07,822 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 476 [2021-07-13 19:37:08,605 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 620 [2021-07-13 19:37:08,785 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 379 [2021-07-13 19:37:09,518 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 306 [2021-07-13 19:37:09,950 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 221 [2021-07-13 19:37:10,131 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 258 [2021-07-13 19:37:10,559 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 470 [2021-07-13 19:37:11,167 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 584 [2021-07-13 19:37:11,977 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 729 [2021-07-13 19:37:12,924 WARN L205 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 807 DAG size of output: 756 [2021-07-13 19:37:14,920 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 1058 DAG size of output: 1016 [2021-07-13 19:37:18,381 WARN L205 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 1591 DAG size of output: 1440 [2021-07-13 19:37:22,425 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 1650 DAG size of output: 1493 [2021-07-13 19:37:27,137 WARN L205 SmtUtils]: Spent 4.70 s on a formula simplification. DAG size of input: 1836 DAG size of output: 1636 [2021-07-13 19:37:35,888 WARN L205 SmtUtils]: Spent 8.74 s on a formula simplification. DAG size of input: 2963 DAG size of output: 2563 [2021-07-13 19:37:53,127 WARN L205 SmtUtils]: Spent 17.22 s on a formula simplification. DAG size of input: 4614 DAG size of output: 4052 [2021-07-13 19:37:54,253 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 800 DAG size of output: 976 [2021-07-13 19:37:55,434 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 716 DAG size of output: 682 [2021-07-13 19:37:55,676 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 358 [2021-07-13 19:37:56,786 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 227 [2021-07-13 19:37:57,049 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 229 [2021-07-13 19:37:57,293 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 262 [2021-07-13 19:37:57,592 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 387 [2021-07-13 19:37:57,751 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 330 [2021-07-13 19:37:58,198 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 234 [2021-07-13 19:37:58,423 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 285 [2021-07-13 19:37:58,648 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 301 [2021-07-13 19:37:59,001 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 392 [2021-07-13 19:37:59,286 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 369 [2021-07-13 19:37:59,450 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 354 [2021-07-13 19:37:59,614 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 299 [2021-07-13 19:37:59,847 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 243 [2021-07-13 19:38:00,000 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 257 [2021-07-13 19:38:00,356 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 521 DAG size of output: 425 [2021-07-13 19:38:00,539 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 317 [2021-07-13 19:38:00,839 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 251 [2021-07-13 19:38:01,052 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 265 [2021-07-13 19:38:01,733 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 566 DAG size of output: 457 [2021-07-13 19:38:02,893 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 791 DAG size of output: 601 [2021-07-13 19:38:03,955 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 903 DAG size of output: 569 [2021-07-13 19:38:05,199 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 917 DAG size of output: 577 [2021-07-13 19:38:05,442 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 536 DAG size of output: 556 [2021-07-13 19:38:05,758 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 407 [2021-07-13 19:38:06,468 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 252 [2021-07-13 19:38:07,152 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 226 [2021-07-13 19:38:07,472 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 301 [2021-07-13 19:38:07,912 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 387 [2021-07-13 19:38:08,064 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 381 [2021-07-13 19:38:08,243 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 362 [2021-07-13 19:38:09,013 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 196 [2021-07-13 19:38:09,167 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 212 [2021-07-13 19:38:09,366 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 232 [2021-07-13 19:38:09,745 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 517 DAG size of output: 408 [2021-07-13 19:38:10,346 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 657 DAG size of output: 540 [2021-07-13 19:38:11,481 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 806 DAG size of output: 647 [2021-07-13 19:38:12,189 WARN L205 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 534 DAG size of output: 597 [2021-07-13 19:38:12,668 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 527 DAG size of output: 542 [2021-07-13 19:38:12,924 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 343 [2021-07-13 19:38:13,346 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 391 DAG size of output: 303 [2021-07-13 19:38:13,554 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 317 [2021-07-13 19:38:14,127 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 264 [2021-07-13 19:38:14,306 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 278 [2021-07-13 19:38:14,783 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 413 [2021-07-13 19:38:15,333 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 422 [2021-07-13 19:38:16,317 WARN L205 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 832 DAG size of output: 690 [2021-07-13 19:38:16,776 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 529 DAG size of output: 554 [2021-07-13 19:38:16,941 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 493 [2021-07-13 19:38:17,480 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 219 [2021-07-13 19:38:17,906 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 210 [2021-07-13 19:38:18,077 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 307 [2021-07-13 19:38:18,435 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 400 [2021-07-13 19:38:18,888 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 427 [2021-07-13 19:38:19,404 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 531 DAG size of output: 446 [2021-07-13 19:38:20,145 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 703 DAG size of output: 589 [2021-07-13 19:38:21,354 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 947 DAG size of output: 808 [2021-07-13 19:38:23,638 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 1252 DAG size of output: 1075 [2021-07-13 19:38:27,336 WARN L205 SmtUtils]: Spent 3.69 s on a formula simplification. DAG size of input: 1464 DAG size of output: 1303 [2021-07-13 19:38:32,399 WARN L205 SmtUtils]: Spent 5.06 s on a formula simplification. DAG size of input: 1926 DAG size of output: 1441 [2021-07-13 19:38:33,429 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 715 DAG size of output: 728 [2021-07-13 19:38:33,656 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 611 DAG size of output: 631 [2021-07-13 19:38:34,350 WARN L205 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 609 DAG size of output: 672 [2021-07-13 19:38:34,515 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 551 [2021-07-13 19:38:34,752 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 405 [2021-07-13 19:38:35,050 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 389 [2021-07-13 19:38:35,185 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 343 [2021-07-13 19:38:35,662 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 216 [2021-07-13 19:38:35,929 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 424 [2021-07-13 19:38:36,130 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 383 [2021-07-13 19:38:36,677 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 281 [2021-07-13 19:38:36,854 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 288 [2021-07-13 19:38:37,177 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 418 [2021-07-13 19:38:37,894 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 650 [2021-07-13 19:38:38,863 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 868 DAG size of output: 789 [2021-07-13 19:38:40,136 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 1058 DAG size of output: 918 [2021-07-13 19:38:40,586 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 629 [2021-07-13 19:38:41,027 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 598 [2021-07-13 19:38:41,268 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 374 [2021-07-13 19:38:41,866 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 307 [2021-07-13 19:38:42,058 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 328 [2021-07-13 19:38:42,552 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 273 [2021-07-13 19:38:42,952 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 451 [2021-07-13 19:38:43,439 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 469 [2021-07-13 19:38:44,321 WARN L205 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 854 DAG size of output: 753 [2021-07-13 19:38:45,659 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 1110 DAG size of output: 1016 [2021-07-13 19:38:48,480 WARN L205 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 1605 DAG size of output: 1449 [2021-07-13 19:38:48,790 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 408 [2021-07-13 19:38:48,944 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 382 [2021-07-13 19:38:49,113 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 363 [2021-07-13 19:38:50,065 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 294 [2021-07-13 19:38:50,308 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 318 [2021-07-13 19:38:50,585 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 336 [2021-07-13 19:38:51,074 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 568 DAG size of output: 519 [2021-07-13 19:38:51,786 WARN L205 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 659 [2021-07-13 19:38:51,968 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 364 [2021-07-13 19:38:52,991 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 303 [2021-07-13 19:38:53,224 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 321 [2021-07-13 19:38:53,505 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 328 [2021-07-13 19:38:53,996 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 496 [2021-07-13 19:38:55,282 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 907 DAG size of output: 849 [2021-07-13 19:38:59,752 WARN L205 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 2012 DAG size of output: 1850 [2021-07-13 19:38:59,973 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 364 [2021-07-13 19:39:01,297 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 219 [2021-07-13 19:39:01,497 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 294 DAG size of output: 303 [2021-07-13 19:39:01,831 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 400 [2021-07-13 19:39:02,237 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 418 DAG size of output: 421 [2021-07-13 19:39:02,495 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 393 [2021-07-13 19:39:02,650 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 344 [2021-07-13 19:39:02,887 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 365 [2021-07-13 19:39:03,078 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 342 [2021-07-13 19:39:03,495 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 355 [2021-07-13 19:39:03,654 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 353 [2021-07-13 19:39:03,981 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 246 [2021-07-13 19:39:04,251 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 411 [2021-07-13 19:39:04,798 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 596 [2021-07-13 19:39:05,568 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 761 DAG size of output: 696 [2021-07-13 19:39:05,830 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 377 [2021-07-13 19:39:05,995 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 363 [2021-07-13 19:39:06,171 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 339 [2021-07-13 19:39:06,605 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 355 [2021-07-13 19:39:06,994 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 521 [2021-07-13 19:39:07,448 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 251 [2021-07-13 19:39:08,081 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 648 DAG size of output: 598 Received shutdown request... [2021-07-13 19:39:09,472 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 994 DAG size of output: 833 [2021-07-13 19:39:11,165 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 1209 DAG size of output: 932 [2021-07-13 19:39:13,152 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 1223 DAG size of output: 940 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown