/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 17:02:57,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 17:02:57,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 17:02:57,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 17:02:58,018 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 [2021-05-03 17:02:58,047 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 17:02:58,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 17:02:58,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 17:02:58,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 17:02:58,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 17:02:58,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 17:02:58,050 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 17:02:58,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 17:02:58,050 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 17:02:58,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 17:02:58,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 17:02:58,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 17:02:58,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 17:02:58,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 17:02:58,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 17:02:58,051 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 17:02:58,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 17:02:58,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 17:02:58,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 17:02:58,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 17:02:58,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 17:02:58,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 17:02:58,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 17:02:58,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 17:02:58,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 17:02:58,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 17:02:58,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 17:02:58,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 17:02:58,317 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 17:02:58,317 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 17:02:58,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-05-03 17:02:58,318 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-05-03 17:02:58,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 17:02:58,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 17:02:58,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 17:02:58,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 17:02:58,373 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 17:02:58,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 17:02:58,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 17:02:58,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 17:02:58,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 17:02:58,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/1) ... [2021-05-03 17:02:58,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 17:02:58,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 17:02:58,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 17:02:58,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 17:02:58,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (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 [2021-05-03 17:02:58,469 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 17:02:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 17:02:58,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 17:02:58,470 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 17:02:58,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 17:02:58,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 17:02:58,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 17:02:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 17:02:58,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 17:02:58,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 17:02:58,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 17:02:58,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 17:02:58,472 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 17:02:58,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 17:02:58,665 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 17:02:58,666 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:02:58 BoogieIcfgContainer [2021-05-03 17:02:58,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 17:02:58,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 17:02:58,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 17:02:58,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 17:02:58,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 05:02:58" (1/2) ... [2021-05-03 17:02:58,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d1c253 and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 05:02:58, skipping insertion in model container [2021-05-03 17:02:58,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 05:02:58" (2/2) ... [2021-05-03 17:02:58,672 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-05-03 17:02:58,675 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 17:02:58,675 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 17:02:58,695 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 17:02:58,696 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 17:02:58,746 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 17:02:58,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 17:02:58,797 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 17:02:58,798 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 17:02:58,798 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 17:02:58,798 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 17:02:58,799 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 17:02:58,801 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 17:02:58,801 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 17:02:58,801 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 17:02:58,811 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-05-03 17:02:58,823 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 17:02:58,830 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:58,830 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:58,830 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1178018128, now seen corresponding path program 1 times [2021-05-03 17:02:58,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:58,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451905593] [2021-05-03 17:02:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:58,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451905593] [2021-05-03 17:02:58,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:02:58,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:02:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808441297] [2021-05-03 17:02:59,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:02:59,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:02:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:02:59,014 INFO L87 Difference]: Start difference. First operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 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 4.2) internal successors, (21), 5 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) [2021-05-03 17:02:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:59,074 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-05-03 17:02:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:02:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 17:02:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:59,092 INFO L225 Difference]: With dead ends: 410 [2021-05-03 17:02:59,092 INFO L226 Difference]: Without dead ends: 395 [2021-05-03 17:02:59,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:02:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-03 17:02:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-05-03 17:02:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-05-03 17:02:59,151 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-05-03 17:02:59,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:59,152 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-05-03 17:02:59,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2021-05-03 17:02:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-05-03 17:02:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:02:59,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:59,157 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:59,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 17:02:59,158 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 435293552, now seen corresponding path program 1 times [2021-05-03 17:02:59,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:59,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451913852] [2021-05-03 17:02:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:59,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451913852] [2021-05-03 17:02:59,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996815509] [2021-05-03 17:02:59,267 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 [2021-05-03 17:02:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:02:59,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:02:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:02:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:02:59,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:02:59,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 17:02:59,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14410956] [2021-05-03 17:02:59,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:02:59,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:02:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:02:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:02:59,491 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:02:59,713 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-05-03 17:02:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:02:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 17:02:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:02:59,717 INFO L225 Difference]: With dead ends: 532 [2021-05-03 17:02:59,717 INFO L226 Difference]: Without dead ends: 532 [2021-05-03 17:02:59,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:02:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-03 17:02:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-05-03 17:02:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-05-03 17:02:59,726 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-05-03 17:02:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:02:59,726 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-05-03 17:02:59,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:02:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-05-03 17:02:59,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:02:59,727 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:02:59,727 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:02:59,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 17:02:59,943 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:02:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:02:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1894116080, now seen corresponding path program 2 times [2021-05-03 17:02:59,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:02:59,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513626291] [2021-05-03 17:02:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:02:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:00,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513626291] [2021-05-03 17:03:00,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377537068] [2021-05-03 17:03:00,007 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 [2021-05-03 17:03:00,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:03:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:00,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:00,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 17:03:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149079939] [2021-05-03 17:03:00,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:00,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:00,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:00,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:00,119 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:00,351 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-05-03 17:03:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 17:03:00,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 17:03:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:00,354 INFO L225 Difference]: With dead ends: 565 [2021-05-03 17:03:00,354 INFO L226 Difference]: Without dead ends: 565 [2021-05-03 17:03:00,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:03:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-05-03 17:03:00,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-05-03 17:03:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-05-03 17:03:00,362 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-05-03 17:03:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:00,362 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-05-03 17:03:00,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-05-03 17:03:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:00,363 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:00,363 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:00,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:00,577 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:00,578 INFO L82 PathProgramCache]: Analyzing trace with hash -672666414, now seen corresponding path program 1 times [2021-05-03 17:03:00,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:00,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209577695] [2021-05-03 17:03:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:00,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209577695] [2021-05-03 17:03:00,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:03:00,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:03:00,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663693069] [2021-05-03 17:03:00,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:03:00,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:00,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:03:00,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:03:00,619 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:03:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:00,674 INFO L93 Difference]: Finished difference Result 302 states and 837 transitions. [2021-05-03 17:03:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:03:00,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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 23 [2021-05-03 17:03:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:00,676 INFO L225 Difference]: With dead ends: 302 [2021-05-03 17:03:00,676 INFO L226 Difference]: Without dead ends: 291 [2021-05-03 17:03:00,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-03 17:03:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 219. [2021-05-03 17:03:00,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.876146788990826) internal successors, (627), 218 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 627 transitions. [2021-05-03 17:03:00,682 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 627 transitions. Word has length 23 [2021-05-03 17:03:00,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:00,682 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 627 transitions. [2021-05-03 17:03:00,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 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) [2021-05-03 17:03:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 627 transitions. [2021-05-03 17:03:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:00,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:00,683 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:00,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 17:03:00,683 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1246032622, now seen corresponding path program 1 times [2021-05-03 17:03:00,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:00,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963139699] [2021-05-03 17:03:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:00,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963139699] [2021-05-03 17:03:00,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:03:00,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:03:00,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228322340] [2021-05-03 17:03:00,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:03:00,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:03:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:03:00,720 INFO L87 Difference]: Start difference. First operand 219 states and 627 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 17:03:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:00,773 INFO L93 Difference]: Finished difference Result 341 states and 932 transitions. [2021-05-03 17:03:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:03:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2021-05-03 17:03:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:00,774 INFO L225 Difference]: With dead ends: 341 [2021-05-03 17:03:00,774 INFO L226 Difference]: Without dead ends: 328 [2021-05-03 17:03:00,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 17:03:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-03 17:03:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 249. [2021-05-03 17:03:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.879032258064516) internal successors, (714), 248 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 714 transitions. [2021-05-03 17:03:00,794 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 714 transitions. Word has length 23 [2021-05-03 17:03:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:00,794 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 714 transitions. [2021-05-03 17:03:00,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 17:03:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 714 transitions. [2021-05-03 17:03:00,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:00,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:00,796 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:00,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 17:03:00,797 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:00,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:00,797 INFO L82 PathProgramCache]: Analyzing trace with hash 730755178, now seen corresponding path program 2 times [2021-05-03 17:03:00,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:00,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732720136] [2021-05-03 17:03:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:00,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732720136] [2021-05-03 17:03:00,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492927577] [2021-05-03 17:03:00,840 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 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 [2021-05-03 17:03:00,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:00,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:03:00,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:00,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:00,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 17:03:00,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901679355] [2021-05-03 17:03:00,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:03:00,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:00,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:03:00,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:00,917 INFO L87 Difference]: Start difference. First operand 249 states and 714 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:00,959 INFO L93 Difference]: Finished difference Result 311 states and 872 transitions. [2021-05-03 17:03:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:03:00,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 17:03:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:00,961 INFO L225 Difference]: With dead ends: 311 [2021-05-03 17:03:00,961 INFO L226 Difference]: Without dead ends: 311 [2021-05-03 17:03:00,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-03 17:03:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 231. [2021-05-03 17:03:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-05-03 17:03:00,966 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-05-03 17:03:00,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:00,966 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-05-03 17:03:00,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:00,966 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-05-03 17:03:00,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:00,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:00,967 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:01,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:01,175 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:01,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:01,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1327749482, now seen corresponding path program 3 times [2021-05-03 17:03:01,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:01,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128922483] [2021-05-03 17:03:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:01,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128922483] [2021-05-03 17:03:01,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286104478] [2021-05-03 17:03:01,215 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:01,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:03:01,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 17:03:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:01,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:01,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-03 17:03:01,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585665005] [2021-05-03 17:03:01,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:01,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:01,328 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:01,463 INFO L93 Difference]: Finished difference Result 520 states and 1433 transitions. [2021-05-03 17:03:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:03:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 17:03:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:01,466 INFO L225 Difference]: With dead ends: 520 [2021-05-03 17:03:01,466 INFO L226 Difference]: Without dead ends: 520 [2021-05-03 17:03:01,467 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:03:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-03 17:03:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 231. [2021-05-03 17:03:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-05-03 17:03:01,475 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-05-03 17:03:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:01,476 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-05-03 17:03:01,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-05-03 17:03:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:01,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:01,478 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:01,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:01,693 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:01,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1918692182, now seen corresponding path program 2 times [2021-05-03 17:03:01,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:01,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030273106] [2021-05-03 17:03:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:01,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030273106] [2021-05-03 17:03:01,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:03:01,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 17:03:01,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595986141] [2021-05-03 17:03:01,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 17:03:01,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 17:03:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 17:03:01,722 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 17:03:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:01,747 INFO L93 Difference]: Finished difference Result 253 states and 731 transitions. [2021-05-03 17:03:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 17:03:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2021-05-03 17:03:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:01,749 INFO L225 Difference]: With dead ends: 253 [2021-05-03 17:03:01,749 INFO L226 Difference]: Without dead ends: 253 [2021-05-03 17:03:01,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:03:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-03 17:03:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 209. [2021-05-03 17:03:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.889423076923077) internal successors, (601), 208 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 601 transitions. [2021-05-03 17:03:01,753 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 601 transitions. Word has length 23 [2021-05-03 17:03:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:01,754 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 601 transitions. [2021-05-03 17:03:01,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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) [2021-05-03 17:03:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 601 transitions. [2021-05-03 17:03:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:01,754 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:01,754 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:01,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-03 17:03:01,755 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1943824618, now seen corresponding path program 3 times [2021-05-03 17:03:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:01,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605892894] [2021-05-03 17:03:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605892894] [2021-05-03 17:03:01,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:03:01,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 17:03:01,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705006425] [2021-05-03 17:03:01,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:03:01,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:03:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:03:01,780 INFO L87 Difference]: Start difference. First operand 209 states and 601 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:01,821 INFO L93 Difference]: Finished difference Result 240 states and 689 transitions. [2021-05-03 17:03:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 17:03:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 23 [2021-05-03 17:03:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:01,823 INFO L225 Difference]: With dead ends: 240 [2021-05-03 17:03:01,823 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 17:03:01,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:03:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 17:03:01,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 178. [2021-05-03 17:03:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.8587570621468927) internal successors, (506), 177 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 506 transitions. [2021-05-03 17:03:01,828 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 506 transitions. Word has length 23 [2021-05-03 17:03:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:01,828 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 506 transitions. [2021-05-03 17:03:01,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 506 transitions. [2021-05-03 17:03:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:01,829 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:01,829 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:01,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-03 17:03:01,829 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2060210918, now seen corresponding path program 4 times [2021-05-03 17:03:01,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:01,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546660263] [2021-05-03 17:03:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:01,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546660263] [2021-05-03 17:03:01,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:03:01,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 17:03:01,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526373761] [2021-05-03 17:03:01,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:03:01,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:03:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:03:01,865 INFO L87 Difference]: Start difference. First operand 178 states and 506 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:01,915 INFO L93 Difference]: Finished difference Result 255 states and 720 transitions. [2021-05-03 17:03:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 17:03:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 23 [2021-05-03 17:03:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:01,917 INFO L225 Difference]: With dead ends: 255 [2021-05-03 17:03:01,917 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 17:03:01,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 17:03:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 17:03:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2021-05-03 17:03:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-05-03 17:03:01,922 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-05-03 17:03:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:01,922 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-05-03 17:03:01,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-05-03 17:03:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:01,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:01,923 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:01,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-03 17:03:01,923 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:01,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash -961400090, now seen corresponding path program 5 times [2021-05-03 17:03:01,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:01,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463388784] [2021-05-03 17:03:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:01,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463388784] [2021-05-03 17:03:01,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:03:01,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 17:03:01,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287180469] [2021-05-03 17:03:01,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:03:01,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:01,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:03:01,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:03:01,946 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:02,025 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-05-03 17:03:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 17:03:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 23 [2021-05-03 17:03:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:02,027 INFO L225 Difference]: With dead ends: 331 [2021-05-03 17:03:02,027 INFO L226 Difference]: Without dead ends: 327 [2021-05-03 17:03:02,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-05-03 17:03:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-05-03 17:03:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-05-03 17:03:02,032 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-05-03 17:03:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:02,032 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-05-03 17:03:02,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-05-03 17:03:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 17:03:02,033 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:02,033 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:02,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-03 17:03:02,033 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash 17157354, now seen corresponding path program 6 times [2021-05-03 17:03:02,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:02,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097823813] [2021-05-03 17:03:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:02,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097823813] [2021-05-03 17:03:02,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 17:03:02,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 17:03:02,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721971769] [2021-05-03 17:03:02,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 17:03:02,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 17:03:02,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-03 17:03:02,073 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:02,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:02,181 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-05-03 17:03:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:03:02,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 23 [2021-05-03 17:03:02,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:02,183 INFO L225 Difference]: With dead ends: 313 [2021-05-03 17:03:02,183 INFO L226 Difference]: Without dead ends: 313 [2021-05-03 17:03:02,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-03 17:03:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-05-03 17:03:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-05-03 17:03:02,190 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-05-03 17:03:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:02,190 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-05-03 17:03:02,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-05-03 17:03:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-05-03 17:03:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:03:02,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:02,191 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:02,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-03 17:03:02,191 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:02,191 INFO L82 PathProgramCache]: Analyzing trace with hash 751961810, now seen corresponding path program 1 times [2021-05-03 17:03:02,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:02,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049396921] [2021-05-03 17:03:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:02,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049396921] [2021-05-03 17:03:02,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27630874] [2021-05-03 17:03:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:03:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 17:03:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:02,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:02,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:02,969 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 17:03:02,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 23 [2021-05-03 17:03:02,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:03,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:03,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:03,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:03,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:03,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-05-03 17:03:03,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:03,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:03,085 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 17:03:03,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-05-03 17:03:03,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:03,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:03,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:03,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:03,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-05-03 17:03:03,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:03,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:03,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 17:03:03,195 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:121, output treesize:51 [2021-05-03 17:03:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:03,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:03,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 17:03:03,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811962241] [2021-05-03 17:03:03,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 17:03:03,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:03,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 17:03:03,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:03:03,286 INFO L87 Difference]: Start difference. First operand 182 states and 514 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:03,939 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-05-03 17:03:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:03:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:03:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:03,942 INFO L225 Difference]: With dead ends: 545 [2021-05-03 17:03:03,942 INFO L226 Difference]: Without dead ends: 515 [2021-05-03 17:03:03,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 832.3ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:03:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-05-03 17:03:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-05-03 17:03:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-05-03 17:03:03,950 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-05-03 17:03:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:03,950 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-05-03 17:03:03,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-05-03 17:03:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:03:03,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:03,951 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:04,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 17:03:04,170 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:04,170 INFO L82 PathProgramCache]: Analyzing trace with hash 758582462, now seen corresponding path program 2 times [2021-05-03 17:03:04,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:04,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70323302] [2021-05-03 17:03:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:04,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70323302] [2021-05-03 17:03:04,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543572093] [2021-05-03 17:03:04,456 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 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 [2021-05-03 17:03:04,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:04,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:04,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 17:03:04,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:04,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,634 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 17:03:04,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 19 [2021-05-03 17:03:04,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:04,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:04,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-05-03 17:03:04,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,691 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:03:04,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-05-03 17:03:04,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:04,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:04,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:04,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-05-03 17:03:04,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:04,748 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-05-03 17:03:04,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:03:04,749 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:35 [2021-05-03 17:03:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:04,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:04,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 17:03:04,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002715920] [2021-05-03 17:03:04,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 17:03:04,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:04,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 17:03:04,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-03 17:03:04,837 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:05,825 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-05-03 17:03:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:03:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:03:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:05,829 INFO L225 Difference]: With dead ends: 697 [2021-05-03 17:03:05,829 INFO L226 Difference]: Without dead ends: 682 [2021-05-03 17:03:05,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1042.2ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:03:05,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-05-03 17:03:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-05-03 17:03:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-05-03 17:03:05,836 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-05-03 17:03:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:05,836 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-05-03 17:03:05,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-05-03 17:03:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:03:05,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:05,837 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:06,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 17:03:06,056 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1762556338, now seen corresponding path program 3 times [2021-05-03 17:03:06,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:06,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269164770] [2021-05-03 17:03:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269164770] [2021-05-03 17:03:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274104696] [2021-05-03 17:03:06,398 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 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 [2021-05-03 17:03:06,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:03:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 17:03:06,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:06,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:06,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:03:06,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350636715] [2021-05-03 17:03:06,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:03:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:06,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:03:06,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:03:06,646 INFO L87 Difference]: Start difference. First operand 256 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:06,828 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-05-03 17:03:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:03:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:03:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:06,830 INFO L225 Difference]: With dead ends: 450 [2021-05-03 17:03:06,830 INFO L226 Difference]: Without dead ends: 435 [2021-05-03 17:03:06,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:03:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-05-03 17:03:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-05-03 17:03:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-05-03 17:03:06,837 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-05-03 17:03:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:06,837 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-05-03 17:03:06,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-05-03 17:03:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:03:06,838 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:06,838 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:07,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:07,053 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:07,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:07,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1965066352, now seen corresponding path program 4 times [2021-05-03 17:03:07,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:07,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973529695] [2021-05-03 17:03:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:07,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973529695] [2021-05-03 17:03:07,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548452558] [2021-05-03 17:03:07,332 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 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 [2021-05-03 17:03:07,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:07,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:07,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 17:03:07,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:07,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:07,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 17:03:07,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331673063] [2021-05-03 17:03:07,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 17:03:07,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:07,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 17:03:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:03:07,563 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:07,768 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-05-03 17:03:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 17:03:07,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:03:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:07,771 INFO L225 Difference]: With dead ends: 406 [2021-05-03 17:03:07,771 INFO L226 Difference]: Without dead ends: 391 [2021-05-03 17:03:07,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:03:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-05-03 17:03:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-05-03 17:03:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-05-03 17:03:07,781 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-05-03 17:03:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:07,782 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-05-03 17:03:07,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-05-03 17:03:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:03:07,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:07,782 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:07,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-03 17:03:07,998 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1336701998, now seen corresponding path program 1 times [2021-05-03 17:03:07,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:07,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483792791] [2021-05-03 17:03:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483792791] [2021-05-03 17:03:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901644863] [2021-05-03 17:03:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:08,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:03:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:08,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:08,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 17:03:08,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757998952] [2021-05-03 17:03:08,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:03:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:03:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:03:08,199 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:08,262 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-05-03 17:03:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:03:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:03:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:08,264 INFO L225 Difference]: With dead ends: 469 [2021-05-03 17:03:08,264 INFO L226 Difference]: Without dead ends: 454 [2021-05-03 17:03:08,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:03:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-03 17:03:08,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-05-03 17:03:08,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-05-03 17:03:08,271 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-05-03 17:03:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:08,271 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-05-03 17:03:08,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-05-03 17:03:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 17:03:08,272 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:08,272 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:08,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:08,488 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash -297591214, now seen corresponding path program 2 times [2021-05-03 17:03:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769093201] [2021-05-03 17:03:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:08,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769093201] [2021-05-03 17:03:08,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636588918] [2021-05-03 17:03:08,553 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 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 [2021-05-03 17:03:08,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:08,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 17:03:08,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:08,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:08,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 17:03:08,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779694479] [2021-05-03 17:03:08,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 17:03:08,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:08,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 17:03:08,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:03:08,687 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:08,741 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-05-03 17:03:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 17:03:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 17:03:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:08,744 INFO L225 Difference]: With dead ends: 491 [2021-05-03 17:03:08,744 INFO L226 Difference]: Without dead ends: 476 [2021-05-03 17:03:08,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 17:03:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-05-03 17:03:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-05-03 17:03:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 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) [2021-05-03 17:03:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-05-03 17:03:08,750 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-05-03 17:03:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:08,751 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-05-03 17:03:08,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-05-03 17:03:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:08,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:08,751 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:08,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:08,967 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:08,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:08,967 INFO L82 PathProgramCache]: Analyzing trace with hash 127479732, now seen corresponding path program 5 times [2021-05-03 17:03:08,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:08,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994737322] [2021-05-03 17:03:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994737322] [2021-05-03 17:03:09,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390786843] [2021-05-03 17:03:09,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:03:09,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:03:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:09,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:09,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:03:09,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626577404] [2021-05-03 17:03:09,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:09,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:09,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:09,138 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:09,265 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-05-03 17:03:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 17:03:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:09,267 INFO L225 Difference]: With dead ends: 446 [2021-05-03 17:03:09,267 INFO L226 Difference]: Without dead ends: 446 [2021-05-03 17:03:09,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:03:09,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-03 17:03:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-05-03 17:03:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-05-03 17:03:09,274 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-05-03 17:03:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:09,275 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-05-03 17:03:09,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-05-03 17:03:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:09,275 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:09,275 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:09,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 17:03:09,493 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1011534832, now seen corresponding path program 6 times [2021-05-03 17:03:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:09,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065115811] [2021-05-03 17:03:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:09,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065115811] [2021-05-03 17:03:09,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855992441] [2021-05-03 17:03:09,524 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 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 [2021-05-03 17:03:09,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:03:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:09,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:09,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458984146] [2021-05-03 17:03:09,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:09,607 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:10,014 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-05-03 17:03:10,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 17:03:10,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:10,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:10,019 INFO L225 Difference]: With dead ends: 1017 [2021-05-03 17:03:10,019 INFO L226 Difference]: Without dead ends: 1017 [2021-05-03 17:03:10,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 17:03:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-05-03 17:03:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-05-03 17:03:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-05-03 17:03:10,033 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-05-03 17:03:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:10,033 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-05-03 17:03:10,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-05-03 17:03:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:10,034 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:10,034 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:10,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 17:03:10,249 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:10,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:10,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1961184076, now seen corresponding path program 1 times [2021-05-03 17:03:10,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:10,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017212297] [2021-05-03 17:03:10,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:10,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017212297] [2021-05-03 17:03:10,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729980029] [2021-05-03 17:03:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 17:03:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:10,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:10,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:10,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:10,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421756353] [2021-05-03 17:03:10,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:10,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:10,367 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:10,552 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-05-03 17:03:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:03:10,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:10,555 INFO L225 Difference]: With dead ends: 838 [2021-05-03 17:03:10,555 INFO L226 Difference]: Without dead ends: 832 [2021-05-03 17:03:10,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:03:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-05-03 17:03:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-05-03 17:03:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-05-03 17:03:10,565 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-05-03 17:03:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:10,566 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-05-03 17:03:10,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-05-03 17:03:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:10,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:10,567 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:10,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-05-03 17:03:10,781 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:10,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:10,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1602477532, now seen corresponding path program 2 times [2021-05-03 17:03:10,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:10,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757900610] [2021-05-03 17:03:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:10,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757900610] [2021-05-03 17:03:10,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056317952] [2021-05-03 17:03:10,821 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 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 [2021-05-03 17:03:10,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:10,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:10,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:10,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:10,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:10,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:10,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752927229] [2021-05-03 17:03:10,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:10,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:10,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:10,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:10,929 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:11,111 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-05-03 17:03:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:03:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:11,115 INFO L225 Difference]: With dead ends: 905 [2021-05-03 17:03:11,115 INFO L226 Difference]: Without dead ends: 905 [2021-05-03 17:03:11,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:03:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-05-03 17:03:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-05-03 17:03:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-05-03 17:03:11,127 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-05-03 17:03:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:11,127 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-05-03 17:03:11,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-05-03 17:03:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:11,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:11,128 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:11,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:11,337 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:11,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1743996268, now seen corresponding path program 7 times [2021-05-03 17:03:11,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:11,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24563520] [2021-05-03 17:03:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24563520] [2021-05-03 17:03:11,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132449444] [2021-05-03 17:03:11,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:11,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:11,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:11,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:11,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:11,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397501241] [2021-05-03 17:03:11,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:11,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:11,466 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:11,763 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-05-03 17:03:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:03:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:11,768 INFO L225 Difference]: With dead ends: 1149 [2021-05-03 17:03:11,768 INFO L226 Difference]: Without dead ends: 1145 [2021-05-03 17:03:11,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 17:03:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-05-03 17:03:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-05-03 17:03:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-05-03 17:03:11,782 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-05-03 17:03:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:11,782 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-05-03 17:03:11,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:11,782 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-05-03 17:03:11,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:11,783 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:11,783 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:11,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:11,997 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:11,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:11,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1159578392, now seen corresponding path program 3 times [2021-05-03 17:03:11,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:11,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989522938] [2021-05-03 17:03:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:12,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989522938] [2021-05-03 17:03:12,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572703129] [2021-05-03 17:03:12,027 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:12,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:03:12,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:12,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:12,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:12,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:12,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:12,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115557307] [2021-05-03 17:03:12,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:12,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:12,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:12,104 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:12,243 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-05-03 17:03:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:03:12,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:12,246 INFO L225 Difference]: With dead ends: 751 [2021-05-03 17:03:12,246 INFO L226 Difference]: Without dead ends: 751 [2021-05-03 17:03:12,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:03:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-05-03 17:03:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-05-03 17:03:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-05-03 17:03:12,256 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-05-03 17:03:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:12,257 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-05-03 17:03:12,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-05-03 17:03:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:12,258 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:12,258 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:12,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:12,473 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash -480090768, now seen corresponding path program 8 times [2021-05-03 17:03:12,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:12,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940068396] [2021-05-03 17:03:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:12,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940068396] [2021-05-03 17:03:12,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295944758] [2021-05-03 17:03:12,505 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 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 [2021-05-03 17:03:12,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:12,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:12,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:12,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545893135] [2021-05-03 17:03:12,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:12,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:12,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:12,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:12,577 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:12,738 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-05-03 17:03:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:03:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:12,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:12,742 INFO L225 Difference]: With dead ends: 983 [2021-05-03 17:03:12,742 INFO L226 Difference]: Without dead ends: 971 [2021-05-03 17:03:12,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:03:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-05-03 17:03:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-05-03 17:03:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:12,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-05-03 17:03:12,753 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-05-03 17:03:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:12,754 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-05-03 17:03:12,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-05-03 17:03:12,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:12,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:12,755 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:12,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:12,971 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1407034092, now seen corresponding path program 9 times [2021-05-03 17:03:12,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:12,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379180422] [2021-05-03 17:03:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:12,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379180422] [2021-05-03 17:03:12,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280946943] [2021-05-03 17:03:13,000 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 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 [2021-05-03 17:03:13,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:03:13,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:13,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:13,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:03:13,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122775853] [2021-05-03 17:03:13,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:13,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:13,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:13,098 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:13,257 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-05-03 17:03:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:03:13,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:13,261 INFO L225 Difference]: With dead ends: 983 [2021-05-03 17:03:13,261 INFO L226 Difference]: Without dead ends: 983 [2021-05-03 17:03:13,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:03:13,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-05-03 17:03:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-05-03 17:03:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-05-03 17:03:13,273 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-05-03 17:03:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:13,273 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-05-03 17:03:13,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-05-03 17:03:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:13,275 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:13,275 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:13,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-03 17:03:13,486 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:13,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2004028396, now seen corresponding path program 10 times [2021-05-03 17:03:13,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:13,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036871203] [2021-05-03 17:03:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:13,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036871203] [2021-05-03 17:03:13,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869550656] [2021-05-03 17:03:13,512 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:13,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:13,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:13,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:13,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:13,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:13,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:13,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068791964] [2021-05-03 17:03:13,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:13,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:13,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:13,609 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:14,026 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-05-03 17:03:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 17:03:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:14,032 INFO L225 Difference]: With dead ends: 1871 [2021-05-03 17:03:14,032 INFO L226 Difference]: Without dead ends: 1871 [2021-05-03 17:03:14,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:03:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-05-03 17:03:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-05-03 17:03:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-05-03 17:03:14,052 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-05-03 17:03:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:14,053 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-05-03 17:03:14,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-05-03 17:03:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:14,054 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:14,054 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:14,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:14,269 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1558477464, now seen corresponding path program 11 times [2021-05-03 17:03:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:14,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862708768] [2021-05-03 17:03:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:14,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862708768] [2021-05-03 17:03:14,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106699310] [2021-05-03 17:03:14,297 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 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 [2021-05-03 17:03:14,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:14,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:14,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:14,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:14,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:14,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:14,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364281103] [2021-05-03 17:03:14,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:14,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:14,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:14,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:14,383 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:14,771 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-05-03 17:03:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:03:14,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:14,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:14,784 INFO L225 Difference]: With dead ends: 1774 [2021-05-03 17:03:14,784 INFO L226 Difference]: Without dead ends: 1766 [2021-05-03 17:03:14,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:03:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-05-03 17:03:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-05-03 17:03:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-05-03 17:03:14,801 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-05-03 17:03:14,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:14,801 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-05-03 17:03:14,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-05-03 17:03:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:14,802 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:14,802 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:15,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 17:03:15,020 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1799894256, now seen corresponding path program 12 times [2021-05-03 17:03:15,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:15,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998595680] [2021-05-03 17:03:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:15,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998595680] [2021-05-03 17:03:15,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582609240] [2021-05-03 17:03:15,050 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:15,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:03:15,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:15,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:15,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:15,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134017671] [2021-05-03 17:03:15,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:15,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:15,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:15,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:15,142 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:15,581 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-05-03 17:03:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 17:03:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:15,585 INFO L225 Difference]: With dead ends: 1916 [2021-05-03 17:03:15,585 INFO L226 Difference]: Without dead ends: 1916 [2021-05-03 17:03:15,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:03:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-05-03 17:03:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-05-03 17:03:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-05-03 17:03:15,607 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-05-03 17:03:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:15,607 INFO L480 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-05-03 17:03:15,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-05-03 17:03:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:15,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:15,609 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:15,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-03 17:03:15,825 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1036250512, now seen corresponding path program 13 times [2021-05-03 17:03:15,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:15,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021256336] [2021-05-03 17:03:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:15,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021256336] [2021-05-03 17:03:15,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850807661] [2021-05-03 17:03:15,854 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 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 [2021-05-03 17:03:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:15,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:15,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:15,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:15,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941321780] [2021-05-03 17:03:15,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:15,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:15,960 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:16,359 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-05-03 17:03:16,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 17:03:16,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:16,363 INFO L225 Difference]: With dead ends: 1888 [2021-05-03 17:03:16,363 INFO L226 Difference]: Without dead ends: 1888 [2021-05-03 17:03:16,364 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 17:03:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-05-03 17:03:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-05-03 17:03:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-05-03 17:03:16,380 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-05-03 17:03:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:16,380 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-05-03 17:03:16,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-05-03 17:03:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:16,381 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:16,381 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:16,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:16,595 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash 904089908, now seen corresponding path program 14 times [2021-05-03 17:03:16,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:16,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177430415] [2021-05-03 17:03:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:16,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177430415] [2021-05-03 17:03:16,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142394981] [2021-05-03 17:03:16,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:16,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:16,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:16,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:16,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:16,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:16,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:03:16,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442093674] [2021-05-03 17:03:16,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:16,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:16,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:16,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:16,728 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:16,893 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-05-03 17:03:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:03:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:16,895 INFO L225 Difference]: With dead ends: 912 [2021-05-03 17:03:16,895 INFO L226 Difference]: Without dead ends: 902 [2021-05-03 17:03:16,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:03:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-05-03 17:03:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-05-03 17:03:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-05-03 17:03:16,907 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-05-03 17:03:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:16,907 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-05-03 17:03:16,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-05-03 17:03:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:16,908 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:16,909 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:17,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:17,125 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash -285121176, now seen corresponding path program 15 times [2021-05-03 17:03:17,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:17,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129344292] [2021-05-03 17:03:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:17,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129344292] [2021-05-03 17:03:17,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949281104] [2021-05-03 17:03:17,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:17,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:03:17,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:17,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:17,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:17,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:17,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894447059] [2021-05-03 17:03:17,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:17,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:17,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:17,241 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:17,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:17,548 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-05-03 17:03:17,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:03:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:17,551 INFO L225 Difference]: With dead ends: 1623 [2021-05-03 17:03:17,551 INFO L226 Difference]: Without dead ends: 1615 [2021-05-03 17:03:17,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:03:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-05-03 17:03:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-05-03 17:03:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-05-03 17:03:17,566 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-05-03 17:03:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:17,566 INFO L480 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-05-03 17:03:17,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-05-03 17:03:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:17,568 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:17,568 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:17,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:17,781 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash 693436268, now seen corresponding path program 16 times [2021-05-03 17:03:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:17,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515327383] [2021-05-03 17:03:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:17,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515327383] [2021-05-03 17:03:17,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482241736] [2021-05-03 17:03:17,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:17,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:17,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:17,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:17,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:17,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:17,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850430683] [2021-05-03 17:03:17,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:17,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:17,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:17,895 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:18,234 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-05-03 17:03:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 17:03:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:18,238 INFO L225 Difference]: With dead ends: 1707 [2021-05-03 17:03:18,238 INFO L226 Difference]: Without dead ends: 1707 [2021-05-03 17:03:18,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:03:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-05-03 17:03:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-05-03 17:03:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-05-03 17:03:18,254 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-05-03 17:03:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:18,255 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-05-03 17:03:18,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-05-03 17:03:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:18,256 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:18,256 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:18,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-05-03 17:03:18,473 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash 339248496, now seen corresponding path program 17 times [2021-05-03 17:03:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:18,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507332101] [2021-05-03 17:03:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507332101] [2021-05-03 17:03:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995285599] [2021-05-03 17:03:18,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:18,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:18,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:18,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:18,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:18,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208406298] [2021-05-03 17:03:18,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:18,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:18,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:18,577 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:18,781 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-05-03 17:03:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:03:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:18,785 INFO L225 Difference]: With dead ends: 1202 [2021-05-03 17:03:18,785 INFO L226 Difference]: Without dead ends: 1190 [2021-05-03 17:03:18,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:03:18,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-05-03 17:03:18,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-05-03 17:03:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-05-03 17:03:18,798 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-05-03 17:03:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:18,798 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-05-03 17:03:18,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-05-03 17:03:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:18,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:18,799 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:19,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:19,013 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1260950636, now seen corresponding path program 18 times [2021-05-03 17:03:19,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:19,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355487059] [2021-05-03 17:03:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355487059] [2021-05-03 17:03:19,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161688048] [2021-05-03 17:03:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:19,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:03:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:19,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:19,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:19,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:19,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096782099] [2021-05-03 17:03:19,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:19,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:19,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:19,130 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:19,387 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-05-03 17:03:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 17:03:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:19,390 INFO L225 Difference]: With dead ends: 1451 [2021-05-03 17:03:19,390 INFO L226 Difference]: Without dead ends: 1443 [2021-05-03 17:03:19,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:03:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-05-03 17:03:19,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-05-03 17:03:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-05-03 17:03:19,405 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-05-03 17:03:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:19,405 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-05-03 17:03:19,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-05-03 17:03:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:19,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:19,407 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:19,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-03 17:03:19,621 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2055459216, now seen corresponding path program 19 times [2021-05-03 17:03:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:19,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041959552] [2021-05-03 17:03:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:19,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041959552] [2021-05-03 17:03:19,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256207410] [2021-05-03 17:03:19,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:19,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:19,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089916825] [2021-05-03 17:03:19,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:19,727 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:20,014 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-05-03 17:03:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 17:03:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:20,017 INFO L225 Difference]: With dead ends: 1579 [2021-05-03 17:03:20,017 INFO L226 Difference]: Without dead ends: 1579 [2021-05-03 17:03:20,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 17:03:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-05-03 17:03:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-05-03 17:03:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-05-03 17:03:20,032 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-05-03 17:03:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:20,032 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-05-03 17:03:20,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-05-03 17:03:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:20,034 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:20,034 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:20,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:20,249 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1812947492, now seen corresponding path program 20 times [2021-05-03 17:03:20,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:20,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72295480] [2021-05-03 17:03:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:20,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72295480] [2021-05-03 17:03:20,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372919818] [2021-05-03 17:03:20,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:20,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:20,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:20,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:20,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:20,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:03:20,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86756441] [2021-05-03 17:03:20,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:20,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:20,363 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:20,613 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-05-03 17:03:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:03:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:20,616 INFO L225 Difference]: With dead ends: 1913 [2021-05-03 17:03:20,616 INFO L226 Difference]: Without dead ends: 1913 [2021-05-03 17:03:20,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:03:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-05-03 17:03:20,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-05-03 17:03:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-05-03 17:03:20,633 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-05-03 17:03:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:20,633 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-05-03 17:03:20,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-05-03 17:03:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:20,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:20,635 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:20,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-03 17:03:20,851 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:20,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1979075620, now seen corresponding path program 21 times [2021-05-03 17:03:20,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:20,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802320057] [2021-05-03 17:03:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:20,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802320057] [2021-05-03 17:03:20,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033591227] [2021-05-03 17:03:20,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:20,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:03:20,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:20,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:20,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:20,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:20,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:03:20,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186438359] [2021-05-03 17:03:20,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:20,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:20,965 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:21,207 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-05-03 17:03:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:03:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:21,209 INFO L225 Difference]: With dead ends: 1741 [2021-05-03 17:03:21,210 INFO L226 Difference]: Without dead ends: 1731 [2021-05-03 17:03:21,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:03:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-05-03 17:03:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-05-03 17:03:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-05-03 17:03:21,227 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-05-03 17:03:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:21,227 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-05-03 17:03:21,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-05-03 17:03:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:21,228 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:21,228 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:21,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:21,441 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1712063380, now seen corresponding path program 22 times [2021-05-03 17:03:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:21,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311413106] [2021-05-03 17:03:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:21,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311413106] [2021-05-03 17:03:21,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344186805] [2021-05-03 17:03:21,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:21,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:21,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:21,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:21,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:21,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:21,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583132229] [2021-05-03 17:03:21,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:21,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:21,561 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:21,852 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-05-03 17:03:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:03:21,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:21,855 INFO L225 Difference]: With dead ends: 1821 [2021-05-03 17:03:21,855 INFO L226 Difference]: Without dead ends: 1821 [2021-05-03 17:03:21,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:03:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-03 17:03:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-05-03 17:03:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-05-03 17:03:21,875 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-05-03 17:03:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:21,875 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-05-03 17:03:21,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-05-03 17:03:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:21,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:21,877 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:22,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 17:03:22,085 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:22,085 INFO L82 PathProgramCache]: Analyzing trace with hash -406491114, now seen corresponding path program 23 times [2021-05-03 17:03:22,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:22,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862397162] [2021-05-03 17:03:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:22,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862397162] [2021-05-03 17:03:22,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680933758] [2021-05-03 17:03:22,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:22,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:22,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:22,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:22,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:22,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 17:03:22,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64738235] [2021-05-03 17:03:22,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:22,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:22,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:22,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:22,214 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:22,372 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-05-03 17:03:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:03:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:22,374 INFO L225 Difference]: With dead ends: 1342 [2021-05-03 17:03:22,374 INFO L226 Difference]: Without dead ends: 1311 [2021-05-03 17:03:22,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 17:03:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-05-03 17:03:22,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-05-03 17:03:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-05-03 17:03:22,397 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-05-03 17:03:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:22,397 INFO L480 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-05-03 17:03:22,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-05-03 17:03:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:22,399 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:22,399 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:22,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 17:03:22,605 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1176867492, now seen corresponding path program 24 times [2021-05-03 17:03:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:22,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354299120] [2021-05-03 17:03:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:22,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354299120] [2021-05-03 17:03:22,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169668010] [2021-05-03 17:03:22,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:22,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:03:22,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:22,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:22,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:22,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:22,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988411790] [2021-05-03 17:03:22,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:22,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:22,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:22,711 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:23,005 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-05-03 17:03:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:03:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:23,008 INFO L225 Difference]: With dead ends: 2119 [2021-05-03 17:03:23,008 INFO L226 Difference]: Without dead ends: 2115 [2021-05-03 17:03:23,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:03:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-05-03 17:03:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-05-03 17:03:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-05-03 17:03:23,027 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-05-03 17:03:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:23,027 INFO L480 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-05-03 17:03:23,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-05-03 17:03:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:23,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:23,029 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:23,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 17:03:23,231 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:23,231 INFO L82 PathProgramCache]: Analyzing trace with hash -198310048, now seen corresponding path program 25 times [2021-05-03 17:03:23,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:23,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637168940] [2021-05-03 17:03:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:23,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637168940] [2021-05-03 17:03:23,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939630289] [2021-05-03 17:03:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:23,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:23,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:23,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:23,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:23,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477883214] [2021-05-03 17:03:23,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:23,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:23,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:23,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:23,333 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:23,689 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-05-03 17:03:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 17:03:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:23,693 INFO L225 Difference]: With dead ends: 2273 [2021-05-03 17:03:23,693 INFO L226 Difference]: Without dead ends: 2273 [2021-05-03 17:03:23,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:03:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-05-03 17:03:23,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-05-03 17:03:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-05-03 17:03:23,714 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-05-03 17:03:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:23,714 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-05-03 17:03:23,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-05-03 17:03:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:23,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:23,729 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:23,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 17:03:23,945 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2016185652, now seen corresponding path program 26 times [2021-05-03 17:03:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:23,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514850665] [2021-05-03 17:03:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:23,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514850665] [2021-05-03 17:03:23,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764053003] [2021-05-03 17:03:23,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:23,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:24,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:24,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:24,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118777424] [2021-05-03 17:03:24,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:24,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:24,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:24,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:24,051 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:24,283 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-05-03 17:03:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:03:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:24,286 INFO L225 Difference]: With dead ends: 2014 [2021-05-03 17:03:24,286 INFO L226 Difference]: Without dead ends: 2014 [2021-05-03 17:03:24,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:03:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-05-03 17:03:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-05-03 17:03:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-05-03 17:03:24,305 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-05-03 17:03:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:24,305 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-05-03 17:03:24,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-05-03 17:03:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:24,307 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:24,307 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:24,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 17:03:24,516 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -499902228, now seen corresponding path program 27 times [2021-05-03 17:03:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:24,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004594046] [2021-05-03 17:03:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:24,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004594046] [2021-05-03 17:03:24,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237497804] [2021-05-03 17:03:24,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:24,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:03:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:24,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:24,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 17:03:24,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453302554] [2021-05-03 17:03:24,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:24,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:24,605 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:24,808 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-05-03 17:03:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:03:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:24,812 INFO L225 Difference]: With dead ends: 1776 [2021-05-03 17:03:24,812 INFO L226 Difference]: Without dead ends: 1764 [2021-05-03 17:03:24,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:03:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-05-03 17:03:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-05-03 17:03:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-05-03 17:03:24,830 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-05-03 17:03:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:24,831 INFO L480 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-05-03 17:03:24,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-05-03 17:03:24,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:24,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:24,833 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:25,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 17:03:25,048 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:25,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1595195728, now seen corresponding path program 28 times [2021-05-03 17:03:25,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:25,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466415489] [2021-05-03 17:03:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466415489] [2021-05-03 17:03:25,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928815967] [2021-05-03 17:03:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:25,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:25,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:25,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 17:03:25,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337752732] [2021-05-03 17:03:25,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:25,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:25,158 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:25,390 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-05-03 17:03:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:03:25,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:25,394 INFO L225 Difference]: With dead ends: 1940 [2021-05-03 17:03:25,394 INFO L226 Difference]: Without dead ends: 1940 [2021-05-03 17:03:25,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:03:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-05-03 17:03:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-05-03 17:03:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:25,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-05-03 17:03:25,426 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-05-03 17:03:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:25,426 INFO L480 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-05-03 17:03:25,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-05-03 17:03:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:25,428 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:25,428 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:25,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-03 17:03:25,628 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:25,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1507209712, now seen corresponding path program 3 times [2021-05-03 17:03:25,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:25,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24266850] [2021-05-03 17:03:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:25,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24266850] [2021-05-03 17:03:25,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871235335] [2021-05-03 17:03:25,658 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 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 [2021-05-03 17:03:25,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:03:25,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:25,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:25,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:25,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:25,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121511994] [2021-05-03 17:03:25,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:25,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:25,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:25,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:25,745 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:25,974 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-05-03 17:03:25,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 17:03:25,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:25,976 INFO L225 Difference]: With dead ends: 1759 [2021-05-03 17:03:25,976 INFO L226 Difference]: Without dead ends: 1759 [2021-05-03 17:03:25,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:03:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-05-03 17:03:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-05-03 17:03:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:25,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-05-03 17:03:25,992 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-05-03 17:03:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:25,992 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-05-03 17:03:25,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-05-03 17:03:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:25,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:25,994 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:26,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:26,209 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:26,210 INFO L82 PathProgramCache]: Analyzing trace with hash 877590964, now seen corresponding path program 4 times [2021-05-03 17:03:26,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:26,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325519591] [2021-05-03 17:03:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:26,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325519591] [2021-05-03 17:03:26,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103465561] [2021-05-03 17:03:26,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:26,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:26,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:26,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:26,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:26,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:26,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:03:26,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399807881] [2021-05-03 17:03:26,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:03:26,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:26,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:03:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:26,307 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-05-03 17:03:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:26,418 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-05-03 17:03:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 17:03:26,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:26,421 INFO L225 Difference]: With dead ends: 1872 [2021-05-03 17:03:26,421 INFO L226 Difference]: Without dead ends: 1854 [2021-05-03 17:03:26,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-03 17:03:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-05-03 17:03:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-05-03 17:03:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-05-03 17:03:26,443 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-05-03 17:03:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:26,443 INFO L480 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-05-03 17:03:26,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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) [2021-05-03 17:03:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-05-03 17:03:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:26,446 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:26,446 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:26,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 17:03:26,660 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:26,660 INFO L82 PathProgramCache]: Analyzing trace with hash 118622872, now seen corresponding path program 5 times [2021-05-03 17:03:26,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:26,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403286408] [2021-05-03 17:03:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:26,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403286408] [2021-05-03 17:03:26,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562688544] [2021-05-03 17:03:26,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:26,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:26,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:26,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-03 17:03:26,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140841025] [2021-05-03 17:03:26,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:03:26,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:26,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:03:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:26,757 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:26,894 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-05-03 17:03:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:03:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:26,898 INFO L225 Difference]: With dead ends: 2133 [2021-05-03 17:03:26,898 INFO L226 Difference]: Without dead ends: 2133 [2021-05-03 17:03:26,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:03:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-05-03 17:03:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-05-03 17:03:26,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:26,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-05-03 17:03:26,923 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-05-03 17:03:26,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:26,923 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-05-03 17:03:26,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:26,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-05-03 17:03:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:26,926 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:26,926 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:27,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:27,142 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash 260141608, now seen corresponding path program 6 times [2021-05-03 17:03:27,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:27,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556199858] [2021-05-03 17:03:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:27,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556199858] [2021-05-03 17:03:27,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719742156] [2021-05-03 17:03:27,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:27,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:03:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:27,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:27,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-03 17:03:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90705676] [2021-05-03 17:03:27,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:27,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:27,270 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:27,456 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-05-03 17:03:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:03:27,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:27,459 INFO L225 Difference]: With dead ends: 2050 [2021-05-03 17:03:27,459 INFO L226 Difference]: Without dead ends: 2046 [2021-05-03 17:03:27,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:03:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-03 17:03:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-05-03 17:03:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-05-03 17:03:27,482 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-05-03 17:03:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:27,482 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-05-03 17:03:27,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-05-03 17:03:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:27,484 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:27,484 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:27,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:27,693 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1708393328, now seen corresponding path program 7 times [2021-05-03 17:03:27,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:27,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400327947] [2021-05-03 17:03:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:27,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400327947] [2021-05-03 17:03:27,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028265688] [2021-05-03 17:03:27,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:27,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:27,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-03 17:03:27,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126115194] [2021-05-03 17:03:27,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:27,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:27,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:27,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:27,818 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:28,058 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-05-03 17:03:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:03:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:28,062 INFO L225 Difference]: With dead ends: 2257 [2021-05-03 17:03:28,062 INFO L226 Difference]: Without dead ends: 2257 [2021-05-03 17:03:28,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:03:28,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-05-03 17:03:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-05-03 17:03:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-05-03 17:03:28,085 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-05-03 17:03:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:28,085 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-05-03 17:03:28,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-05-03 17:03:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:28,088 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:28,088 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:28,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:28,288 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1264325580, now seen corresponding path program 8 times [2021-05-03 17:03:28,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:28,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105846751] [2021-05-03 17:03:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:28,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105846751] [2021-05-03 17:03:28,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054425376] [2021-05-03 17:03:28,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:03:28,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:28,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:28,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:28,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:28,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-03 17:03:28,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240822592] [2021-05-03 17:03:28,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:03:28,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:28,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:03:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:28,375 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:28,503 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-05-03 17:03:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:03:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:28,507 INFO L225 Difference]: With dead ends: 2263 [2021-05-03 17:03:28,507 INFO L226 Difference]: Without dead ends: 2257 [2021-05-03 17:03:28,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:03:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-05-03 17:03:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-05-03 17:03:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-05-03 17:03:28,529 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-05-03 17:03:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:28,529 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-05-03 17:03:28,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-05-03 17:03:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:28,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:28,531 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:28,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:28,732 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1995631268, now seen corresponding path program 9 times [2021-05-03 17:03:28,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:28,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590608961] [2021-05-03 17:03:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:28,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590608961] [2021-05-03 17:03:28,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506494630] [2021-05-03 17:03:28,757 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:28,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:03:28,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:28,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:28,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:28,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:28,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-05-03 17:03:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97081668] [2021-05-03 17:03:28,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:03:28,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:03:28,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:28,838 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:28,977 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-05-03 17:03:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 17:03:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:28,981 INFO L225 Difference]: With dead ends: 2415 [2021-05-03 17:03:28,981 INFO L226 Difference]: Without dead ends: 2415 [2021-05-03 17:03:28,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-05-03 17:03:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-05-03 17:03:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-05-03 17:03:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-05-03 17:03:29,005 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-05-03 17:03:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:29,005 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-05-03 17:03:29,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-05-03 17:03:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:29,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:29,008 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:29,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 17:03:29,223 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:29,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1854112532, now seen corresponding path program 10 times [2021-05-03 17:03:29,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:29,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828895103] [2021-05-03 17:03:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:29,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828895103] [2021-05-03 17:03:29,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401404627] [2021-05-03 17:03:29,252 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 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 [2021-05-03 17:03:29,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:29,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:29,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:29,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:29,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-03 17:03:29,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103058921] [2021-05-03 17:03:29,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:29,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:29,333 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:29,552 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-05-03 17:03:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:03:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:29,556 INFO L225 Difference]: With dead ends: 2204 [2021-05-03 17:03:29,556 INFO L226 Difference]: Without dead ends: 2200 [2021-05-03 17:03:29,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:03:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-05-03 17:03:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-05-03 17:03:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-05-03 17:03:29,577 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-05-03 17:03:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:29,577 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-05-03 17:03:29,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-05-03 17:03:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:29,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:29,579 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:29,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 17:03:29,780 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1856436888, now seen corresponding path program 11 times [2021-05-03 17:03:29,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:29,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879066878] [2021-05-03 17:03:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:29,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879066878] [2021-05-03 17:03:29,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082579507] [2021-05-03 17:03:29,803 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 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 [2021-05-03 17:03:29,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:29,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:29,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:29,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:29,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 17:03:29,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544825681] [2021-05-03 17:03:29,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 17:03:29,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 17:03:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 17:03:29,867 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:29,989 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-05-03 17:03:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:03:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:29,992 INFO L225 Difference]: With dead ends: 2022 [2021-05-03 17:03:29,992 INFO L226 Difference]: Without dead ends: 2022 [2021-05-03 17:03:29,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:03:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-05-03 17:03:30,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-05-03 17:03:30,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-05-03 17:03:30,014 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-05-03 17:03:30,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:30,014 INFO L480 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-05-03 17:03:30,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:30,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-05-03 17:03:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:30,016 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:30,017 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:30,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-03 17:03:30,227 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:30,228 INFO L82 PathProgramCache]: Analyzing trace with hash 216767728, now seen corresponding path program 12 times [2021-05-03 17:03:30,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:30,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605719064] [2021-05-03 17:03:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:30,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605719064] [2021-05-03 17:03:30,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139621377] [2021-05-03 17:03:30,254 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 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 [2021-05-03 17:03:30,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:03:30,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:30,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:30,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:30,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218547240] [2021-05-03 17:03:30,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:30,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:30,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:30,331 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:30,527 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-05-03 17:03:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:03:30,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:30,531 INFO L225 Difference]: With dead ends: 2124 [2021-05-03 17:03:30,531 INFO L226 Difference]: Without dead ends: 2112 [2021-05-03 17:03:30,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:03:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-05-03 17:03:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-05-03 17:03:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-05-03 17:03:30,552 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-05-03 17:03:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:30,552 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-05-03 17:03:30,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-05-03 17:03:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:30,555 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:30,555 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:30,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 17:03:30,755 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:30,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:30,756 INFO L82 PathProgramCache]: Analyzing trace with hash -670090772, now seen corresponding path program 4 times [2021-05-03 17:03:30,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:30,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956484322] [2021-05-03 17:03:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956484322] [2021-05-03 17:03:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356385580] [2021-05-03 17:03:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:30,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:30,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:30,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:30,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:30,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:30,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192239129] [2021-05-03 17:03:30,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:30,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:30,867 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:31,103 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-05-03 17:03:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:03:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:31,106 INFO L225 Difference]: With dead ends: 2332 [2021-05-03 17:03:31,106 INFO L226 Difference]: Without dead ends: 2320 [2021-05-03 17:03:31,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:03:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-05-03 17:03:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-05-03 17:03:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-05-03 17:03:31,130 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-05-03 17:03:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:31,130 INFO L480 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-05-03 17:03:31,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-05-03 17:03:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:31,133 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:31,133 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:31,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-03 17:03:31,345 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1401396460, now seen corresponding path program 5 times [2021-05-03 17:03:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:31,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120704153] [2021-05-03 17:03:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:31,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120704153] [2021-05-03 17:03:31,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652762148] [2021-05-03 17:03:31,367 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 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 [2021-05-03 17:03:31,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:31,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:31,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:31,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:31,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:31,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:31,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866088024] [2021-05-03 17:03:31,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:31,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:31,444 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:31,683 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-05-03 17:03:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:03:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:31,686 INFO L225 Difference]: With dead ends: 2490 [2021-05-03 17:03:31,687 INFO L226 Difference]: Without dead ends: 2490 [2021-05-03 17:03:31,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:03:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-05-03 17:03:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-05-03 17:03:31,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-05-03 17:03:31,708 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-05-03 17:03:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:31,708 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-05-03 17:03:31,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-05-03 17:03:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:31,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:31,710 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:31,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 17:03:31,925 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1810785004, now seen corresponding path program 13 times [2021-05-03 17:03:31,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:31,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645977291] [2021-05-03 17:03:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:31,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645977291] [2021-05-03 17:03:31,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207350323] [2021-05-03 17:03:31,959 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 [2021-05-03 17:03:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:31,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:32,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:32,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:32,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734889779] [2021-05-03 17:03:32,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:32,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:32,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:32,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:32,056 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:32,346 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-05-03 17:03:32,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 17:03:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:32,351 INFO L225 Difference]: With dead ends: 2497 [2021-05-03 17:03:32,351 INFO L226 Difference]: Without dead ends: 2497 [2021-05-03 17:03:32,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:03:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-05-03 17:03:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-05-03 17:03:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-05-03 17:03:32,376 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-05-03 17:03:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:32,376 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-05-03 17:03:32,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-05-03 17:03:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:32,379 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:32,379 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:32,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:32,579 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:32,580 INFO L82 PathProgramCache]: Analyzing trace with hash -168744536, now seen corresponding path program 14 times [2021-05-03 17:03:32,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:32,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693171474] [2021-05-03 17:03:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:32,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693171474] [2021-05-03 17:03:32,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942185179] [2021-05-03 17:03:32,607 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 [2021-05-03 17:03:32,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:32,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:32,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:32,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922230441] [2021-05-03 17:03:32,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:32,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:32,705 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:33,129 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-05-03 17:03:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 17:03:33,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:33,134 INFO L225 Difference]: With dead ends: 2724 [2021-05-03 17:03:33,134 INFO L226 Difference]: Without dead ends: 2724 [2021-05-03 17:03:33,134 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:03:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-05-03 17:03:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-05-03 17:03:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-05-03 17:03:33,159 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-05-03 17:03:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:33,160 INFO L480 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-05-03 17:03:33,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-05-03 17:03:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:33,162 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:33,162 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:33,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 17:03:33,363 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:33,363 INFO L82 PathProgramCache]: Analyzing trace with hash 563716900, now seen corresponding path program 15 times [2021-05-03 17:03:33,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:33,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093080503] [2021-05-03 17:03:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093080503] [2021-05-03 17:03:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348403437] [2021-05-03 17:03:33,395 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 [2021-05-03 17:03:33,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:03:33,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:33,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:33,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:33,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:33,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595959146] [2021-05-03 17:03:33,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:33,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:33,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:33,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:33,517 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:33,871 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-05-03 17:03:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 17:03:33,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:33,875 INFO L225 Difference]: With dead ends: 2582 [2021-05-03 17:03:33,875 INFO L226 Difference]: Without dead ends: 2578 [2021-05-03 17:03:33,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 17:03:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-05-03 17:03:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-05-03 17:03:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:33,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-05-03 17:03:33,898 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-05-03 17:03:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:33,898 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-05-03 17:03:33,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-05-03 17:03:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:33,900 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:33,900 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:34,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:34,115 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1088595216, now seen corresponding path program 16 times [2021-05-03 17:03:34,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:34,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886432692] [2021-05-03 17:03:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:34,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886432692] [2021-05-03 17:03:34,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111059948] [2021-05-03 17:03:34,144 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) [2021-05-03 17:03:34,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:34,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:34,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:34,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:34,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767465217] [2021-05-03 17:03:34,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:34,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:34,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:34,220 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:34,521 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-05-03 17:03:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 17:03:34,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:34,526 INFO L225 Difference]: With dead ends: 2411 [2021-05-03 17:03:34,526 INFO L226 Difference]: Without dead ends: 2411 [2021-05-03 17:03:34,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:03:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-05-03 17:03:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-05-03 17:03:34,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-05-03 17:03:34,551 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-05-03 17:03:34,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:34,551 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-05-03 17:03:34,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:34,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-05-03 17:03:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:34,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:34,554 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:34,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:34,754 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1331852852, now seen corresponding path program 6 times [2021-05-03 17:03:34,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:34,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802940737] [2021-05-03 17:03:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:34,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802940737] [2021-05-03 17:03:34,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619397087] [2021-05-03 17:03:34,777 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 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 [2021-05-03 17:03:34,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 17:03:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:34,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:34,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:34,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:34,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417224941] [2021-05-03 17:03:34,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:34,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:34,859 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:35,066 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-05-03 17:03:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:03:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:35,069 INFO L225 Difference]: With dead ends: 1987 [2021-05-03 17:03:35,069 INFO L226 Difference]: Without dead ends: 1975 [2021-05-03 17:03:35,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:03:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-05-03 17:03:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-05-03 17:03:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-05-03 17:03:35,091 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-05-03 17:03:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:35,091 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-05-03 17:03:35,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-05-03 17:03:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:35,093 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:35,093 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:35,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:35,294 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1010707988, now seen corresponding path program 7 times [2021-05-03 17:03:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:35,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415512610] [2021-05-03 17:03:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:35,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415512610] [2021-05-03 17:03:35,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137873865] [2021-05-03 17:03:35,318 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 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 [2021-05-03 17:03:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:35,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:35,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:35,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:35,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:35,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431225968] [2021-05-03 17:03:35,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:35,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:35,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:35,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:35,396 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:35,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:35,588 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-05-03 17:03:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 17:03:35,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:35,592 INFO L225 Difference]: With dead ends: 1951 [2021-05-03 17:03:35,592 INFO L226 Difference]: Without dead ends: 1923 [2021-05-03 17:03:35,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:03:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-05-03 17:03:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-05-03 17:03:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-05-03 17:03:35,613 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-05-03 17:03:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:35,613 INFO L480 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-05-03 17:03:35,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-05-03 17:03:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:35,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:35,615 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:35,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:35,818 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122076, now seen corresponding path program 8 times [2021-05-03 17:03:35,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:35,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625184930] [2021-05-03 17:03:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:35,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625184930] [2021-05-03 17:03:35,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376639685] [2021-05-03 17:03:35,840 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:35,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:35,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:35,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:35,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:03:35,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085895590] [2021-05-03 17:03:35,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:35,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:35,917 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:36,109 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-05-03 17:03:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:03:36,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:36,113 INFO L225 Difference]: With dead ends: 2417 [2021-05-03 17:03:36,113 INFO L226 Difference]: Without dead ends: 2417 [2021-05-03 17:03:36,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:03:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-05-03 17:03:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-05-03 17:03:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-05-03 17:03:36,139 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-05-03 17:03:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:36,139 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-05-03 17:03:36,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-05-03 17:03:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:36,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:36,141 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:36,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-03 17:03:36,357 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash -782245740, now seen corresponding path program 9 times [2021-05-03 17:03:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:36,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869496889] [2021-05-03 17:03:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:36,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869496889] [2021-05-03 17:03:36,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609759216] [2021-05-03 17:03:36,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:03:36,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 17:03:36,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:36,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:36,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:03:36,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657154455] [2021-05-03 17:03:36,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:36,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:36,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:36,452 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:36,633 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-05-03 17:03:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 17:03:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:36,637 INFO L225 Difference]: With dead ends: 2191 [2021-05-03 17:03:36,637 INFO L226 Difference]: Without dead ends: 2170 [2021-05-03 17:03:36,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-05-03 17:03:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-05-03 17:03:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-05-03 17:03:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-05-03 17:03:36,658 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-05-03 17:03:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:36,659 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-05-03 17:03:36,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-05-03 17:03:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:36,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:36,661 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:36,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:36,861 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:36,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:36,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1171437904, now seen corresponding path program 10 times [2021-05-03 17:03:36,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:36,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705331254] [2021-05-03 17:03:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:36,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705331254] [2021-05-03 17:03:36,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196873413] [2021-05-03 17:03:36,889 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 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 [2021-05-03 17:03:36,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:36,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:36,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 17:03:36,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315017464] [2021-05-03 17:03:36,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:36,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:36,956 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:37,091 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-05-03 17:03:37,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 17:03:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:37,095 INFO L225 Difference]: With dead ends: 1790 [2021-05-03 17:03:37,095 INFO L226 Difference]: Without dead ends: 1790 [2021-05-03 17:03:37,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-05-03 17:03:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-05-03 17:03:37,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-05-03 17:03:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-05-03 17:03:37,114 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-05-03 17:03:37,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:37,114 INFO L480 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-05-03 17:03:37,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-05-03 17:03:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:37,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:37,116 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:37,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 17:03:37,317 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:37,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2112049896, now seen corresponding path program 11 times [2021-05-03 17:03:37,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:37,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556106805] [2021-05-03 17:03:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:37,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556106805] [2021-05-03 17:03:37,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543901592] [2021-05-03 17:03:37,340 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 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 [2021-05-03 17:03:37,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:37,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:37,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:37,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:03:37,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37426468] [2021-05-03 17:03:37,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:37,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:37,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:37,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:37,417 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:37,576 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-05-03 17:03:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:03:37,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:37,580 INFO L225 Difference]: With dead ends: 2556 [2021-05-03 17:03:37,580 INFO L226 Difference]: Without dead ends: 2556 [2021-05-03 17:03:37,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:03:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-05-03 17:03:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-05-03 17:03:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-05-03 17:03:37,612 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-05-03 17:03:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:37,612 INFO L480 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-05-03 17:03:37,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-05-03 17:03:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:37,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:37,615 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:37,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:37,825 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:37,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:37,825 INFO L82 PathProgramCache]: Analyzing trace with hash -523450416, now seen corresponding path program 12 times [2021-05-03 17:03:37,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:37,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744014162] [2021-05-03 17:03:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:37,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744014162] [2021-05-03 17:03:37,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932923010] [2021-05-03 17:03:37,849 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 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 [2021-05-03 17:03:37,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 17:03:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 17:03:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:37,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:37,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 17:03:37,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640938353] [2021-05-03 17:03:37,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 17:03:37,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:37,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 17:03:37,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 17:03:37,919 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:38,071 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-05-03 17:03:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 17:03:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:38,084 INFO L225 Difference]: With dead ends: 2232 [2021-05-03 17:03:38,084 INFO L226 Difference]: Without dead ends: 2211 [2021-05-03 17:03:38,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-05-03 17:03:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-03 17:03:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-05-03 17:03:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-05-03 17:03:38,106 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-05-03 17:03:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:38,107 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-05-03 17:03:38,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-05-03 17:03:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:38,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:38,109 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:38,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-03 17:03:38,317 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1318431600, now seen corresponding path program 17 times [2021-05-03 17:03:38,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:38,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029033775] [2021-05-03 17:03:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:38,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029033775] [2021-05-03 17:03:38,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460593421] [2021-05-03 17:03:38,345 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 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 [2021-05-03 17:03:38,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:38,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:38,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555519175] [2021-05-03 17:03:38,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:38,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:38,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:38,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:38,437 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:38,919 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-05-03 17:03:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 17:03:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:38,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:38,925 INFO L225 Difference]: With dead ends: 3478 [2021-05-03 17:03:38,925 INFO L226 Difference]: Without dead ends: 3478 [2021-05-03 17:03:38,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 17:03:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-05-03 17:03:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-05-03 17:03:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-05-03 17:03:38,960 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-05-03 17:03:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:38,960 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-05-03 17:03:38,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-05-03 17:03:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:38,963 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:38,963 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:39,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:39,181 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2050893036, now seen corresponding path program 18 times [2021-05-03 17:03:39,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:39,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46072176] [2021-05-03 17:03:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:39,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46072176] [2021-05-03 17:03:39,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429096842] [2021-05-03 17:03:39,212 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 17:03:39,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:03:39,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:39,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:39,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 17:03:39,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364663057] [2021-05-03 17:03:39,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 17:03:39,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:39,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 17:03:39,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 17:03:39,313 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:39,726 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-05-03 17:03:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 17:03:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:39,732 INFO L225 Difference]: With dead ends: 3323 [2021-05-03 17:03:39,732 INFO L226 Difference]: Without dead ends: 3319 [2021-05-03 17:03:39,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 17:03:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-05-03 17:03:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-05-03 17:03:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-05-03 17:03:39,768 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-05-03 17:03:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:39,768 INFO L480 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-05-03 17:03:39,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-05-03 17:03:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:39,771 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:39,771 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:39,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-03 17:03:39,973 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:39,973 INFO L82 PathProgramCache]: Analyzing trace with hash -173194000, now seen corresponding path program 19 times [2021-05-03 17:03:39,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:39,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165355249] [2021-05-03 17:03:39,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165355249] [2021-05-03 17:03:40,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860005872] [2021-05-03 17:03:40,001 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 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 [2021-05-03 17:03:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:40,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:40,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:40,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 17:03:40,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712349983] [2021-05-03 17:03:40,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:40,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:40,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:40,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:40,079 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:40,416 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-05-03 17:03:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 17:03:40,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:40,420 INFO L225 Difference]: With dead ends: 3041 [2021-05-03 17:03:40,420 INFO L226 Difference]: Without dead ends: 3029 [2021-05-03 17:03:40,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 17:03:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-05-03 17:03:40,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-05-03 17:03:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-05-03 17:03:40,450 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-05-03 17:03:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:40,450 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-05-03 17:03:40,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-05-03 17:03:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:40,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:40,453 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:40,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:40,654 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:40,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2106791024, now seen corresponding path program 20 times [2021-05-03 17:03:40,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:40,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891697458] [2021-05-03 17:03:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:40,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891697458] [2021-05-03 17:03:40,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593703697] [2021-05-03 17:03:40,681 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 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 [2021-05-03 17:03:40,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:40,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:40,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:40,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-03 17:03:40,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354661719] [2021-05-03 17:03:40,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:40,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:40,762 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:41,258 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-05-03 17:03:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 17:03:41,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:41,263 INFO L225 Difference]: With dead ends: 4165 [2021-05-03 17:03:41,264 INFO L226 Difference]: Without dead ends: 4165 [2021-05-03 17:03:41,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:03:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-05-03 17:03:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-05-03 17:03:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:41,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-05-03 17:03:41,302 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-05-03 17:03:41,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:41,303 INFO L480 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-05-03 17:03:41,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:41,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-05-03 17:03:41,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:41,305 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:41,305 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:41,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:41,521 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:41,521 INFO L82 PathProgramCache]: Analyzing trace with hash -729353744, now seen corresponding path program 21 times [2021-05-03 17:03:41,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:41,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935871494] [2021-05-03 17:03:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:41,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935871494] [2021-05-03 17:03:41,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316274993] [2021-05-03 17:03:41,546 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 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 [2021-05-03 17:03:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:03:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:41,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:41,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-03 17:03:41,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310821179] [2021-05-03 17:03:41,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 17:03:41,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 17:03:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 17:03:41,636 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:42,100 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-05-03 17:03:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 17:03:42,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:42,106 INFO L225 Difference]: With dead ends: 4184 [2021-05-03 17:03:42,106 INFO L226 Difference]: Without dead ends: 4184 [2021-05-03 17:03:42,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 17:03:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-05-03 17:03:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-05-03 17:03:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-05-03 17:03:42,146 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-05-03 17:03:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:42,146 INFO L480 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-05-03 17:03:42,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-05-03 17:03:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:42,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:42,164 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:42,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-05-03 17:03:42,364 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:42,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash 21775592, now seen corresponding path program 22 times [2021-05-03 17:03:42,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:42,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126475118] [2021-05-03 17:03:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:42,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126475118] [2021-05-03 17:03:42,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925469293] [2021-05-03 17:03:42,390 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 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 [2021-05-03 17:03:42,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:03:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:42,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:42,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-03 17:03:42,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458595614] [2021-05-03 17:03:42,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:42,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:42,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:42,459 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-05-03 17:03:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:42,824 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-05-03 17:03:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 17:03:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:42,831 INFO L225 Difference]: With dead ends: 3911 [2021-05-03 17:03:42,832 INFO L226 Difference]: Without dead ends: 3907 [2021-05-03 17:03:42,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:03:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-05-03 17:03:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-05-03 17:03:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-05-03 17:03:42,869 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-05-03 17:03:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:42,869 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-05-03 17:03:42,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-05-03 17:03:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-05-03 17:03:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:42,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:42,872 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:43,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-03 17:03:43,073 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:43,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1000333036, now seen corresponding path program 23 times [2021-05-03 17:03:43,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:43,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058392042] [2021-05-03 17:03:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:43,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058392042] [2021-05-03 17:03:43,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020359348] [2021-05-03 17:03:43,105 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 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 [2021-05-03 17:03:43,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:03:43,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:43,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:43,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 17:03:43,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:43,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-03 17:03:43,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914640750] [2021-05-03 17:03:43,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:43,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:43,177 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-05-03 17:03:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:43,584 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-05-03 17:03:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 17:03:43,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:43,591 INFO L225 Difference]: With dead ends: 4058 [2021-05-03 17:03:43,591 INFO L226 Difference]: Without dead ends: 4058 [2021-05-03 17:03:43,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 17:03:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-05-03 17:03:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-05-03 17:03:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-05-03 17:03:43,645 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-05-03 17:03:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:43,645 INFO L480 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-05-03 17:03:43,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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) [2021-05-03 17:03:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-05-03 17:03:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:43,648 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:43,648 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:43,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:43,859 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:43,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:43,860 INFO L82 PathProgramCache]: Analyzing trace with hash 646145264, now seen corresponding path program 24 times [2021-05-03 17:03:43,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:43,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004899356] [2021-05-03 17:03:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:43,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004899356] [2021-05-03 17:03:43,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311812925] [2021-05-03 17:03:43,885 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 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 [2021-05-03 17:03:43,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:03:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:43,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:43,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:43,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:43,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767702404] [2021-05-03 17:03:43,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:43,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:43,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:43,966 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:44,259 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-05-03 17:03:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 17:03:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:44,265 INFO L225 Difference]: With dead ends: 3346 [2021-05-03 17:03:44,265 INFO L226 Difference]: Without dead ends: 3334 [2021-05-03 17:03:44,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:03:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-05-03 17:03:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-05-03 17:03:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-05-03 17:03:44,299 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-05-03 17:03:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:44,299 INFO L480 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-05-03 17:03:44,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-05-03 17:03:44,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:44,301 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:44,301 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:44,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 17:03:44,502 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:44,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1567847404, now seen corresponding path program 25 times [2021-05-03 17:03:44,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:44,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442782046] [2021-05-03 17:03:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:44,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442782046] [2021-05-03 17:03:44,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264621169] [2021-05-03 17:03:44,530 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 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 [2021-05-03 17:03:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:44,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:44,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:44,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:44,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846597850] [2021-05-03 17:03:44,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:44,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:44,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:44,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:44,595 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:44,948 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-05-03 17:03:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 17:03:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:44,966 INFO L225 Difference]: With dead ends: 3635 [2021-05-03 17:03:44,966 INFO L226 Difference]: Without dead ends: 3631 [2021-05-03 17:03:44,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 17:03:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-05-03 17:03:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-05-03 17:03:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-05-03 17:03:45,002 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-05-03 17:03:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:45,002 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-05-03 17:03:45,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:45,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-05-03 17:03:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 17:03:45,005 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:45,006 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:45,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 17:03:45,206 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:45,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1748562448, now seen corresponding path program 26 times [2021-05-03 17:03:45,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:45,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270122092] [2021-05-03 17:03:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:45,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270122092] [2021-05-03 17:03:45,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871596860] [2021-05-03 17:03:45,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:03:45,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:03:45,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:45,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 17:03:45,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:45,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:45,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 17:03:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274029256] [2021-05-03 17:03:45,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 17:03:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 17:03:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 17:03:45,304 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:45,722 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-05-03 17:03:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 17:03:45,723 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 17:03:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:45,729 INFO L225 Difference]: With dead ends: 3810 [2021-05-03 17:03:45,729 INFO L226 Difference]: Without dead ends: 3810 [2021-05-03 17:03:45,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 17:03:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-05-03 17:03:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-05-03 17:03:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-05-03 17:03:45,764 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-05-03 17:03:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:45,765 INFO L480 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-05-03 17:03:45,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-05-03 17:03:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:03:45,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:45,767 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:45,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-03 17:03:45,968 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2115287982, now seen corresponding path program 29 times [2021-05-03 17:03:45,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:45,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025377086] [2021-05-03 17:03:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:46,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025377086] [2021-05-03 17:03:46,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610811493] [2021-05-03 17:03:46,496 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 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 [2021-05-03 17:03:46,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:03:46,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 17:03:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:47,003 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 17:03:47,214 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_17], 7=[v_prenex_19], 9=[A, v_prenex_14], 12=[v_prenex_21, v_prenex_15]} [2021-05-03 17:03:47,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:47,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-05-03 17:03:47,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:47,420 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 17:03:47,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:47,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,454 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 17:03:47,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-05-03 17:03:47,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:47,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,492 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-05-03 17:03:47,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 42 [2021-05-03 17:03:47,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:47,783 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2021-05-03 17:03:47,784 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-05-03 17:03:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,807 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 17:03:47,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 17:03:47,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:47,942 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 17:03:47,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:47,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:47,967 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 17:03:47,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-05-03 17:03:47,968 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:48,098 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-05-03 17:03:48,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,138 INFO L354 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2021-05-03 17:03:48,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 17:03:48,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:48,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:48,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-05-03 17:03:48,194 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:48,431 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-05-03 17:03:48,431 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.3 percent of original size [2021-05-03 17:03:48,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,479 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-05-03 17:03:48,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-05-03 17:03:48,486 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:48,534 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-05-03 17:03:48,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 55 [2021-05-03 17:03:48,549 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:48,669 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 17:03:48,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:48,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 17:03:48,680 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:433, output treesize:121 [2021-05-03 17:03:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:48,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:48,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-05-03 17:03:48,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640354169] [2021-05-03 17:03:48,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 17:03:48,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 17:03:48,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:03:48,804 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:49,351 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-05-03 17:03:50,439 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-05-03 17:03:51,134 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 76 [2021-05-03 17:03:53,466 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2021-05-03 17:03:54,240 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 90 [2021-05-03 17:03:54,524 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 70 [2021-05-03 17:03:54,886 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-05-03 17:03:55,028 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 17:03:55,322 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-05-03 17:03:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:03:55,961 INFO L93 Difference]: Finished difference Result 2647 states and 8894 transitions. [2021-05-03 17:03:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 17:03:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:03:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:03:55,966 INFO L225 Difference]: With dead ends: 2647 [2021-05-03 17:03:55,966 INFO L226 Difference]: Without dead ends: 2617 [2021-05-03 17:03:55,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 7175.5ms TimeCoverageRelationStatistics Valid=950, Invalid=4162, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 17:03:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-05-03 17:03:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2119. [2021-05-03 17:03:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-05-03 17:03:55,995 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-05-03 17:03:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:03:55,996 INFO L480 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-05-03 17:03:55,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:03:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-05-03 17:03:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:03:55,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:03:55,999 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:03:56,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 17:03:56,213 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:03:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:03:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 663836106, now seen corresponding path program 30 times [2021-05-03 17:03:56,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:03:56,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447608829] [2021-05-03 17:03:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:03:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:03:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:56,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447608829] [2021-05-03 17:03:56,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448380241] [2021-05-03 17:03:56,711 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 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 [2021-05-03 17:03:56,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 17:03:56,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:03:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 17:03:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:03:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,393 INFO L354 Elim1Store]: treesize reduction 14, result has 82.7 percent of original size [2021-05-03 17:03:57,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 76 [2021-05-03 17:03:57,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,503 INFO L354 Elim1Store]: treesize reduction 14, result has 82.7 percent of original size [2021-05-03 17:03:57,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 76 [2021-05-03 17:03:57,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,549 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-05-03 17:03:57,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 22 [2021-05-03 17:03:57,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,573 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-05-03 17:03:57,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 10 [2021-05-03 17:03:57,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:57,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:57,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2021-05-03 17:03:57,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:57,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:03:57,599 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:57,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:03:57,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 127 [2021-05-03 17:03:57,846 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-05-03 17:03:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,879 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:03:57,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 17:03:57,882 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:57,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:03:57,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:03:57,915 INFO L354 Elim1Store]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 17:03:57,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 32 [2021-05-03 17:03:57,921 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 17:03:58,109 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2021-05-03 17:03:58,109 INFO L628 ElimStorePlain]: treesize reduction 356, result has 35.4 percent of original size [2021-05-03 17:03:58,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 17:03:58,112 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:505, output treesize:201 [2021-05-03 17:03:58,247 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 17:03:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:03:58,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:03:58,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 17:03:58,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262125966] [2021-05-03 17:03:58,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 17:03:58,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:03:58,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 17:03:58,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-03 17:03:58,377 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:00,211 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-05-03 17:04:00,632 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 44 [2021-05-03 17:04:00,859 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-05-03 17:04:01,226 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 38 [2021-05-03 17:04:01,563 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-05-03 17:04:01,759 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-05-03 17:04:01,901 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-03 17:04:02,108 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2021-05-03 17:04:02,303 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-05-03 17:04:02,568 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-05-03 17:04:02,778 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-05-03 17:04:02,935 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-05-03 17:04:03,075 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-05-03 17:04:03,344 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-05-03 17:04:03,622 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-05-03 17:04:03,817 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-05-03 17:04:03,987 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-05-03 17:04:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:04,170 INFO L93 Difference]: Finished difference Result 3375 states and 11164 transitions. [2021-05-03 17:04:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 17:04:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:04,177 INFO L225 Difference]: With dead ends: 3375 [2021-05-03 17:04:04,177 INFO L226 Difference]: Without dead ends: 3330 [2021-05-03 17:04:04,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 5789.1ms TimeCoverageRelationStatistics Valid=1312, Invalid=5660, Unknown=0, NotChecked=0, Total=6972 [2021-05-03 17:04:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-05-03 17:04:04,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2135. [2021-05-03 17:04:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.5107778819119027) internal successors, (7492), 2134 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7492 transitions. [2021-05-03 17:04:04,213 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7492 transitions. Word has length 29 [2021-05-03 17:04:04,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:04,213 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 7492 transitions. [2021-05-03 17:04:04,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7492 transitions. [2021-05-03 17:04:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:04,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:04,216 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:04,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-03 17:04:04,417 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:04,417 INFO L82 PathProgramCache]: Analyzing trace with hash -390332982, now seen corresponding path program 31 times [2021-05-03 17:04:04,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:04,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822514998] [2021-05-03 17:04:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:04,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822514998] [2021-05-03 17:04:04,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862546989] [2021-05-03 17:04:04,912 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 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 [2021-05-03 17:04:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:04,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:04:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:05,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:05,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 17:04:05,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792988836] [2021-05-03 17:04:05,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 17:04:05,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 17:04:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:04:05,443 INFO L87 Difference]: Start difference. First operand 2135 states and 7492 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:06,687 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-05-03 17:04:07,049 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2021-05-03 17:04:07,241 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-05-03 17:04:07,390 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-05-03 17:04:07,665 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-05-03 17:04:07,823 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2021-05-03 17:04:08,016 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-05-03 17:04:08,301 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 17:04:08,554 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-05-03 17:04:08,822 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-05-03 17:04:09,070 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-05-03 17:04:09,340 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-05-03 17:04:09,925 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-05-03 17:04:10,206 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 17:04:10,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:10,305 INFO L93 Difference]: Finished difference Result 3159 states and 10589 transitions. [2021-05-03 17:04:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:04:10,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:10,311 INFO L225 Difference]: With dead ends: 3159 [2021-05-03 17:04:10,311 INFO L226 Difference]: Without dead ends: 3144 [2021-05-03 17:04:10,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 4823.6ms TimeCoverageRelationStatistics Valid=925, Invalid=3905, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 17:04:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-05-03 17:04:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2139. [2021-05-03 17:04:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.510757717492984) internal successors, (7506), 2138 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7506 transitions. [2021-05-03 17:04:10,344 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7506 transitions. Word has length 29 [2021-05-03 17:04:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:10,344 INFO L480 AbstractCegarLoop]: Abstraction has 2139 states and 7506 transitions. [2021-05-03 17:04:10,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7506 transitions. [2021-05-03 17:04:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:10,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:10,347 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:10,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:10,547 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:10,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1865872178, now seen corresponding path program 32 times [2021-05-03 17:04:10,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:10,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151333655] [2021-05-03 17:04:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:11,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151333655] [2021-05-03 17:04:11,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628272135] [2021-05-03 17:04:11,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:11,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:11,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 17:04:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:11,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:11,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 17:04:11,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008042790] [2021-05-03 17:04:11,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 17:04:11,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:11,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 17:04:11,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:04:11,728 INFO L87 Difference]: Start difference. First operand 2139 states and 7506 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:12,178 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-05-03 17:04:12,590 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-05-03 17:04:12,727 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-05-03 17:04:12,951 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2021-05-03 17:04:13,975 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-05-03 17:04:14,279 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-05-03 17:04:14,447 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2021-05-03 17:04:14,673 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-05-03 17:04:15,113 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-05-03 17:04:15,415 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-05-03 17:04:16,229 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-03 17:04:16,393 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-05-03 17:04:16,644 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-03 17:04:17,127 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-05-03 17:04:17,280 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-05-03 17:04:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:17,960 INFO L93 Difference]: Finished difference Result 3649 states and 12210 transitions. [2021-05-03 17:04:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 17:04:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:17,968 INFO L225 Difference]: With dead ends: 3649 [2021-05-03 17:04:17,968 INFO L226 Difference]: Without dead ends: 3634 [2021-05-03 17:04:17,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 6157.2ms TimeCoverageRelationStatistics Valid=1277, Invalid=5863, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 17:04:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-05-03 17:04:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2143. [2021-05-03 17:04:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.510737628384687) internal successors, (7520), 2142 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7520 transitions. [2021-05-03 17:04:18,003 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7520 transitions. Word has length 29 [2021-05-03 17:04:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:18,003 INFO L480 AbstractCegarLoop]: Abstraction has 2143 states and 7520 transitions. [2021-05-03 17:04:18,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7520 transitions. [2021-05-03 17:04:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:18,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:18,006 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:18,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-05-03 17:04:18,207 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:18,207 INFO L82 PathProgramCache]: Analyzing trace with hash -47808706, now seen corresponding path program 33 times [2021-05-03 17:04:18,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:18,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818092154] [2021-05-03 17:04:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:18,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818092154] [2021-05-03 17:04:18,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214366453] [2021-05-03 17:04:18,798 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 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 [2021-05-03 17:04:18,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:04:18,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:18,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 17:04:18,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:19,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 47 [2021-05-03 17:04:19,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:19,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,490 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:04:19,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 17:04:19,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:19,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 127 [2021-05-03 17:04:19,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 17:04:19,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,762 INFO L354 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2021-05-03 17:04:19,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 30 [2021-05-03 17:04:19,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:19,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,797 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 17:04:19,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2021-05-03 17:04:19,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:19,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,920 INFO L354 Elim1Store]: treesize reduction 16, result has 86.1 percent of original size [2021-05-03 17:04:19,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 111 [2021-05-03 17:04:19,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:19,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:19,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:19,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:19,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:19,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:19,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2021-05-03 17:04:19,994 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:19,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:04:19,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:20,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:20,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:20,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:20,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:20,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:20,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:20,028 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-05-03 17:04:20,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 22 [2021-05-03 17:04:20,030 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:20,233 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-05-03 17:04:20,233 INFO L628 ElimStorePlain]: treesize reduction 835, result has 18.9 percent of original size [2021-05-03 17:04:20,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 17:04:20,236 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:511, output treesize:201 [2021-05-03 17:04:20,370 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 17:04:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:20,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:20,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-05-03 17:04:20,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738916614] [2021-05-03 17:04:20,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 17:04:20,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 17:04:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-05-03 17:04:20,462 INFO L87 Difference]: Start difference. First operand 2143 states and 7520 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-05-03 17:04:20,972 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-03 17:04:21,622 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-03 17:04:21,941 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-05-03 17:04:22,524 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 17:04:22,664 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-03 17:04:22,789 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-05-03 17:04:22,936 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 17:04:23,152 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-05-03 17:04:23,631 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-05-03 17:04:24,064 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-05-03 17:04:24,586 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-05-03 17:04:25,183 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 17:04:25,363 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-05-03 17:04:25,637 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-03 17:04:25,790 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-05-03 17:04:25,962 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-05-03 17:04:26,146 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-05-03 17:04:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:26,357 INFO L93 Difference]: Finished difference Result 2991 states and 9866 transitions. [2021-05-03 17:04:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 17:04:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:26,362 INFO L225 Difference]: With dead ends: 2991 [2021-05-03 17:04:26,362 INFO L226 Difference]: Without dead ends: 2961 [2021-05-03 17:04:26,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 6060.8ms TimeCoverageRelationStatistics Valid=1189, Invalid=5131, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 17:04:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-05-03 17:04:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2166. [2021-05-03 17:04:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.5163972286374134) internal successors, (7613), 2165 states have internal predecessors, (7613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7613 transitions. [2021-05-03 17:04:26,393 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7613 transitions. Word has length 29 [2021-05-03 17:04:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:26,394 INFO L480 AbstractCegarLoop]: Abstraction has 2166 states and 7613 transitions. [2021-05-03 17:04:26,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-05-03 17:04:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7613 transitions. [2021-05-03 17:04:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:26,396 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:26,396 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:26,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:26,597 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:26,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1738821818, now seen corresponding path program 34 times [2021-05-03 17:04:26,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:26,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36922634] [2021-05-03 17:04:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:27,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36922634] [2021-05-03 17:04:27,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954962001] [2021-05-03 17:04:27,152 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 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 [2021-05-03 17:04:27,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:04:27,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:27,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:04:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,482 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-05-03 17:04:27,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 42 [2021-05-03 17:04:27,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-05-03 17:04:27,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,575 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:04:27,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 17:04:27,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-05-03 17:04:27,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:04:27,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,649 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-05-03 17:04:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-05-03 17:04:27,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-05-03 17:04:27,721 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-05-03 17:04:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:27,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:27,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-05-03 17:04:27,730 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:04:27,733 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:27,781 INFO L628 ElimStorePlain]: treesize reduction 48, result has 42.2 percent of original size [2021-05-03 17:04:27,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:04:27,782 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:334, output treesize:35 [2021-05-03 17:04:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:27,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:27,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 17:04:27,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220440347] [2021-05-03 17:04:27,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 17:04:27,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:27,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 17:04:27,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:04:27,863 INFO L87 Difference]: Start difference. First operand 2166 states and 7613 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:28,240 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-03 17:04:28,483 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 17:04:29,360 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 17:04:29,514 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-05-03 17:04:29,763 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2021-05-03 17:04:30,638 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-05-03 17:04:30,837 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 17:04:30,980 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-05-03 17:04:31,426 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-05-03 17:04:31,597 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 17:04:31,746 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-05-03 17:04:32,279 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-05-03 17:04:32,598 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-05-03 17:04:32,879 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-05-03 17:04:33,232 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-05-03 17:04:33,398 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 17:04:33,664 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-05-03 17:04:33,914 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-05-03 17:04:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:34,187 INFO L93 Difference]: Finished difference Result 3804 states and 12493 transitions. [2021-05-03 17:04:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-03 17:04:34,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:34,193 INFO L225 Difference]: With dead ends: 3804 [2021-05-03 17:04:34,193 INFO L226 Difference]: Without dead ends: 3770 [2021-05-03 17:04:34,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 6147.3ms TimeCoverageRelationStatistics Valid=1465, Invalid=5845, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 17:04:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-05-03 17:04:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2174. [2021-05-03 17:04:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 3.5227795674183158) internal successors, (7655), 2173 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 7655 transitions. [2021-05-03 17:04:34,230 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 7655 transitions. Word has length 29 [2021-05-03 17:04:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:34,231 INFO L480 AbstractCegarLoop]: Abstraction has 2174 states and 7655 transitions. [2021-05-03 17:04:34,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 7655 transitions. [2021-05-03 17:04:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:34,233 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:34,233 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:34,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-05-03 17:04:34,434 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1705222590, now seen corresponding path program 35 times [2021-05-03 17:04:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:34,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859248875] [2021-05-03 17:04:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859248875] [2021-05-03 17:04:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80388742] [2021-05-03 17:04:34,984 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 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 [2021-05-03 17:04:35,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 17:04:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 17:04:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:35,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:35,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-05-03 17:04:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505478321] [2021-05-03 17:04:35,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 17:04:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 17:04:35,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:04:35,574 INFO L87 Difference]: Start difference. First operand 2174 states and 7655 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:36,788 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2021-05-03 17:04:37,425 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-05-03 17:04:37,667 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 36 [2021-05-03 17:04:37,807 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-05-03 17:04:38,507 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-05-03 17:04:38,802 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 17:04:39,128 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-05-03 17:04:39,436 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-03 17:04:39,803 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-05-03 17:04:39,933 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 17:04:40,339 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-05-03 17:04:40,483 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 17:04:40,666 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-05-03 17:04:40,820 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 17:04:41,199 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-03 17:04:41,378 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-03 17:04:41,698 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-03 17:04:41,935 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-05-03 17:04:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:42,343 INFO L93 Difference]: Finished difference Result 3564 states and 11816 transitions. [2021-05-03 17:04:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 17:04:42,344 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:42,349 INFO L225 Difference]: With dead ends: 3564 [2021-05-03 17:04:42,349 INFO L226 Difference]: Without dead ends: 3534 [2021-05-03 17:04:42,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 6618.0ms TimeCoverageRelationStatistics Valid=1369, Invalid=7561, Unknown=0, NotChecked=0, Total=8930 [2021-05-03 17:04:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3534 states. [2021-05-03 17:04:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3534 to 2182. [2021-05-03 17:04:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.525905547913801) internal successors, (7690), 2181 states have internal predecessors, (7690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7690 transitions. [2021-05-03 17:04:42,381 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7690 transitions. Word has length 29 [2021-05-03 17:04:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:42,381 INFO L480 AbstractCegarLoop]: Abstraction has 2182 states and 7690 transitions. [2021-05-03 17:04:42,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7690 transitions. [2021-05-03 17:04:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:42,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:42,384 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:42,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-05-03 17:04:42,584 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1876233986, now seen corresponding path program 36 times [2021-05-03 17:04:42,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:42,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605701692] [2021-05-03 17:04:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605701692] [2021-05-03 17:04:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585295746] [2021-05-03 17:04:43,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:43,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 17:04:43,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:43,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:04:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,561 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-05-03 17:04:43,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 42 [2021-05-03 17:04:43,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-05-03 17:04:43,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,611 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:04:43,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 17:04:43,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-05-03 17:04:43,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:04:43,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,681 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-05-03 17:04:43,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-05-03 17:04:43,704 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:43,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-05-03 17:04:43,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-05-03 17:04:43,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:43,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:43,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-05-03 17:04:43,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:04:43,775 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:43,823 INFO L628 ElimStorePlain]: treesize reduction 48, result has 42.2 percent of original size [2021-05-03 17:04:43,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:04:43,824 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:334, output treesize:35 [2021-05-03 17:04:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:43,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:43,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-05-03 17:04:43,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827169433] [2021-05-03 17:04:43,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 17:04:43,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 17:04:43,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-05-03 17:04:43,913 INFO L87 Difference]: Start difference. First operand 2182 states and 7690 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:44,359 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-05-03 17:04:44,516 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-05-03 17:04:44,814 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-05-03 17:04:45,351 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-05-03 17:04:46,051 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-05-03 17:04:46,589 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-05-03 17:04:46,907 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-05-03 17:04:47,435 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-03 17:04:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:47,741 INFO L93 Difference]: Finished difference Result 3027 states and 10081 transitions. [2021-05-03 17:04:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 17:04:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:47,746 INFO L225 Difference]: With dead ends: 3027 [2021-05-03 17:04:47,746 INFO L226 Difference]: Without dead ends: 3005 [2021-05-03 17:04:47,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 3770.5ms TimeCoverageRelationStatistics Valid=770, Invalid=2890, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 17:04:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-05-03 17:04:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2194. [2021-05-03 17:04:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 3.528499772001824) internal successors, (7738), 2193 states have internal predecessors, (7738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 7738 transitions. [2021-05-03 17:04:47,780 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 7738 transitions. Word has length 29 [2021-05-03 17:04:47,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:47,780 INFO L480 AbstractCegarLoop]: Abstraction has 2194 states and 7738 transitions. [2021-05-03 17:04:47,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 7738 transitions. [2021-05-03 17:04:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:47,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:47,783 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:47,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-05-03 17:04:47,990 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:47,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:47,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1414759434, now seen corresponding path program 37 times [2021-05-03 17:04:47,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:47,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673348557] [2021-05-03 17:04:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:48,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673348557] [2021-05-03 17:04:48,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497981215] [2021-05-03 17:04:48,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:48,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:04:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:49,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:49,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 17:04:49,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648713053] [2021-05-03 17:04:49,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 17:04:49,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:49,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 17:04:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:04:49,131 INFO L87 Difference]: Start difference. First operand 2194 states and 7738 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:50,106 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-05-03 17:04:50,575 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-05-03 17:04:50,929 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-05-03 17:04:51,064 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 17:04:51,751 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-05-03 17:04:52,121 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-05-03 17:04:52,439 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-03 17:04:52,740 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-05-03 17:04:53,166 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-05-03 17:04:53,358 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-05-03 17:04:53,629 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-05-03 17:04:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:04:53,955 INFO L93 Difference]: Finished difference Result 3152 states and 10618 transitions. [2021-05-03 17:04:53,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 17:04:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:04:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:04:53,961 INFO L225 Difference]: With dead ends: 3152 [2021-05-03 17:04:53,961 INFO L226 Difference]: Without dead ends: 3137 [2021-05-03 17:04:53,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 4634.9ms TimeCoverageRelationStatistics Valid=879, Invalid=4523, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 17:04:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-05-03 17:04:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2213. [2021-05-03 17:04:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 3.523508137432188) internal successors, (7794), 2212 states have internal predecessors, (7794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 7794 transitions. [2021-05-03 17:04:53,993 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 7794 transitions. Word has length 29 [2021-05-03 17:04:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:04:53,994 INFO L480 AbstractCegarLoop]: Abstraction has 2213 states and 7794 transitions. [2021-05-03 17:04:53,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 7794 transitions. [2021-05-03 17:04:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:04:53,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:04:53,996 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:04:54,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:04:54,197 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:04:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:04:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2040643966, now seen corresponding path program 38 times [2021-05-03 17:04:54,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:04:54,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256260225] [2021-05-03 17:04:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:04:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:04:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:54,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256260225] [2021-05-03 17:04:54,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859878684] [2021-05-03 17:04:54,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:04:54,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:04:54,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:04:54,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:04:54,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:04:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,405 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 17:04:55,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-05-03 17:04:55,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,471 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-05-03 17:04:55,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-05-03 17:04:55,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,535 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 17:04:55,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-05-03 17:04:55,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-05-03 17:04:55,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:04:55,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-05-03 17:04:55,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-05-03 17:04:55,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,668 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-05-03 17:04:55,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 23 [2021-05-03 17:04:55,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:04:55,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:04:55,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:04:55,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 10 [2021-05-03 17:04:55,687 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,689 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:04:55,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 17:04:55,754 INFO L628 ElimStorePlain]: treesize reduction 92, result has 35.2 percent of original size [2021-05-03 17:04:55,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 17:04:55,756 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:388, output treesize:34 [2021-05-03 17:04:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:04:55,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:04:55,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 17:04:55,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062303557] [2021-05-03 17:04:55,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 17:04:55,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:04:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 17:04:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:04:55,844 INFO L87 Difference]: Start difference. First operand 2213 states and 7794 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:04:56,913 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-05-03 17:04:57,245 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-05-03 17:04:57,480 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-05-03 17:04:57,684 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 17:04:57,825 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-03 17:04:58,101 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-05-03 17:04:58,687 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-05-03 17:04:59,165 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-05-03 17:04:59,532 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-05-03 17:04:59,816 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-05-03 17:05:00,210 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-05-03 17:05:00,575 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-05-03 17:05:01,015 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-03 17:05:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:01,217 INFO L93 Difference]: Finished difference Result 3817 states and 12863 transitions. [2021-05-03 17:05:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 17:05:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:05:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:01,225 INFO L225 Difference]: With dead ends: 3817 [2021-05-03 17:05:01,225 INFO L226 Difference]: Without dead ends: 3780 [2021-05-03 17:05:01,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 5420.4ms TimeCoverageRelationStatistics Valid=1099, Invalid=4907, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 17:05:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-05-03 17:05:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 2226. [2021-05-03 17:05:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 3.526292134831461) internal successors, (7846), 2225 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 7846 transitions. [2021-05-03 17:05:01,261 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 7846 transitions. Word has length 29 [2021-05-03 17:05:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:01,261 INFO L480 AbstractCegarLoop]: Abstraction has 2226 states and 7846 transitions. [2021-05-03 17:05:01,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 7846 transitions. [2021-05-03 17:05:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:05:01,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:01,264 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:01,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-05-03 17:05:01,477 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:01,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1387426286, now seen corresponding path program 39 times [2021-05-03 17:05:01,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:01,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457324481] [2021-05-03 17:05:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:02,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457324481] [2021-05-03 17:05:02,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395567419] [2021-05-03 17:05:02,161 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 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 [2021-05-03 17:05:02,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 17:05:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 17:05:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:30,918 WARN L205 SmtUtils]: Spent 28.40 s on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-05-03 17:05:31,210 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_42], 7=[v_prenex_44], 9=[A], 12=[v_prenex_40, v_prenex_38]} [2021-05-03 17:05:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:31,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-05-03 17:05:31,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:31,387 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 17:05:31,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,430 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-05-03 17:05:31,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 32 [2021-05-03 17:05:31,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,478 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-05-03 17:05:31,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 44 [2021-05-03 17:05:31,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:31,747 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2021-05-03 17:05:31,748 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-05-03 17:05:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,779 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 17:05:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 17:05:31,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:31,905 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 17:05:31,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:31,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:31,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-05-03 17:05:31,975 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:31,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:31,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,033 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-05-03 17:05:32,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-05-03 17:05:32,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:32,256 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-05-03 17:05:32,257 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.1 percent of original size [2021-05-03 17:05:32,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,319 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-05-03 17:05:32,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-05-03 17:05:32,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:05:32,382 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-05-03 17:05:32,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 55 [2021-05-03 17:05:32,412 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:05:32,516 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 17:05:32,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:05:32,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 17:05:32,520 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 10 variables, input treesize:345, output treesize:116 [2021-05-03 17:05:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:32,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:32,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-05-03 17:05:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111897687] [2021-05-03 17:05:32,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 17:05:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 17:05:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:05:32,638 INFO L87 Difference]: Start difference. First operand 2226 states and 7846 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:33,506 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-05-03 17:05:33,706 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-05-03 17:05:34,272 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-05-03 17:05:35,217 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-05-03 17:05:35,453 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-05-03 17:05:49,758 WARN L205 SmtUtils]: Spent 14.14 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 17:05:50,044 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-05-03 17:05:50,413 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-05-03 17:05:50,737 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-05-03 17:05:50,877 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-05-03 17:05:51,133 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-05-03 17:05:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:51,575 INFO L93 Difference]: Finished difference Result 3719 states and 12619 transitions. [2021-05-03 17:05:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:05:51,576 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:05:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:51,582 INFO L225 Difference]: With dead ends: 3719 [2021-05-03 17:05:51,582 INFO L226 Difference]: Without dead ends: 3692 [2021-05-03 17:05:51,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 47357.5ms TimeCoverageRelationStatistics Valid=942, Invalid=4170, Unknown=0, NotChecked=0, Total=5112 [2021-05-03 17:05:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3692 states. [2021-05-03 17:05:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3692 to 2234. [2021-05-03 17:05:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 3.5244066278549036) internal successors, (7870), 2233 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 7870 transitions. [2021-05-03 17:05:51,617 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 7870 transitions. Word has length 29 [2021-05-03 17:05:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:51,617 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 7870 transitions. [2021-05-03 17:05:51,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 7870 transitions. [2021-05-03 17:05:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:05:51,620 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:51,620 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:51,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:51,833 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1589944394, now seen corresponding path program 40 times [2021-05-03 17:05:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:51,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016315346] [2021-05-03 17:05:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:52,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016315346] [2021-05-03 17:05:52,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103897497] [2021-05-03 17:05:52,399 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 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 [2021-05-03 17:05:52,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:05:52,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:05:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 17:05:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:52,948 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 17:05:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:53,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:05:53,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-03 17:05:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155778612] [2021-05-03 17:05:53,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 17:05:53,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:05:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 17:05:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:05:53,047 INFO L87 Difference]: Start difference. First operand 2234 states and 7870 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:53,871 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2021-05-03 17:05:54,136 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-05-03 17:05:54,475 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-05-03 17:05:55,599 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 17:05:55,728 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-05-03 17:05:56,033 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-05-03 17:05:56,359 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-05-03 17:05:56,577 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-05-03 17:05:57,395 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-03 17:05:57,861 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-05-03 17:05:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:05:58,142 INFO L93 Difference]: Finished difference Result 3714 states and 12523 transitions. [2021-05-03 17:05:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 17:05:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:05:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:05:58,149 INFO L225 Difference]: With dead ends: 3714 [2021-05-03 17:05:58,149 INFO L226 Difference]: Without dead ends: 3699 [2021-05-03 17:05:58,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 5011.2ms TimeCoverageRelationStatistics Valid=1020, Invalid=4680, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 17:05:58,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2021-05-03 17:05:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 2234. [2021-05-03 17:05:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 3.5244066278549036) internal successors, (7870), 2233 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 7870 transitions. [2021-05-03 17:05:58,196 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 7870 transitions. Word has length 29 [2021-05-03 17:05:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:05:58,197 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 7870 transitions. [2021-05-03 17:05:58,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:05:58,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 7870 transitions. [2021-05-03 17:05:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:05:58,200 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:05:58,200 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:05:58,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-05-03 17:05:58,400 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:05:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:05:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1619613102, now seen corresponding path program 13 times [2021-05-03 17:05:58,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:05:58,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624034734] [2021-05-03 17:05:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:05:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:05:58,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624034734] [2021-05-03 17:05:58,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689663843] [2021-05-03 17:05:58,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:05:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:05:58,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:05:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:05:59,861 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-05-03 17:06:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:00,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:06:00,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-05-03 17:06:00,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148604798] [2021-05-03 17:06:00,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 17:06:00,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:06:00,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 17:06:00,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:06:00,142 INFO L87 Difference]: Start difference. First operand 2234 states and 7870 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:06,931 WARN L205 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-03 17:06:15,605 WARN L205 SmtUtils]: Spent 8.26 s on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-05-03 17:06:18,918 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-05-03 17:06:25,205 WARN L205 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-03 17:06:30,209 WARN L205 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-05-03 17:06:34,557 WARN L205 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-03 17:06:34,965 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 17:06:35,164 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 17:06:35,374 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-05-03 17:06:35,912 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-05-03 17:06:36,119 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-05-03 17:06:36,578 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-05-03 17:06:36,998 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-05-03 17:06:37,211 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 17:06:37,412 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 17:06:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:06:37,460 INFO L93 Difference]: Finished difference Result 3634 states and 12031 transitions. [2021-05-03 17:06:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 17:06:37,461 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:06:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:06:37,469 INFO L225 Difference]: With dead ends: 3634 [2021-05-03 17:06:37,469 INFO L226 Difference]: Without dead ends: 3619 [2021-05-03 17:06:37,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 37175.5ms TimeCoverageRelationStatistics Valid=782, Invalid=3250, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 17:06:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-05-03 17:06:37,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 2244. [2021-05-03 17:06:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 3.521622826571556) internal successors, (7899), 2243 states have internal predecessors, (7899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 7899 transitions. [2021-05-03 17:06:37,508 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 7899 transitions. Word has length 29 [2021-05-03 17:06:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:06:37,508 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 7899 transitions. [2021-05-03 17:06:37,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:06:37,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 7899 transitions. [2021-05-03 17:06:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:06:37,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:06:37,511 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:06:37,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-05-03 17:06:37,712 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:06:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:06:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1969180942, now seen corresponding path program 14 times [2021-05-03 17:06:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:06:37,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575002666] [2021-05-03 17:06:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:06:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:06:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:06:38,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575002666] [2021-05-03 17:06:38,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608688649] [2021-05-03 17:06:38,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:06:38,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:06:38,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:06:38,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 17:06:38,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:06:57,445 WARN L205 SmtUtils]: Spent 18.37 s on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-05-03 17:06:57,663 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_62], 14=[A, v_prenex_60, v_prenex_65, v_prenex_63]} [2021-05-03 17:06:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:57,713 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-05-03 17:06:57,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 17 treesize of output 31 [2021-05-03 17:06:57,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:57,889 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 17:06:57,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:57,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:57,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:58,058 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 17:06:58,058 INFO L354 Elim1Store]: treesize reduction 30, result has 70.9 percent of original size [2021-05-03 17:06:58,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 82 [2021-05-03 17:06:58,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:58,436 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 98 [2021-05-03 17:06:58,437 INFO L628 ElimStorePlain]: treesize reduction 56, result has 82.2 percent of original size [2021-05-03 17:06:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:58,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 112 [2021-05-03 17:06:58,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:58,924 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 17:06:58,925 INFO L354 Elim1Store]: treesize reduction 26, result has 74.8 percent of original size [2021-05-03 17:06:58,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 86 [2021-05-03 17:06:59,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:59,361 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-05-03 17:06:59,362 INFO L628 ElimStorePlain]: treesize reduction 18, result has 92.3 percent of original size [2021-05-03 17:06:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:59,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:59,516 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 17:06:59,517 INFO L354 Elim1Store]: treesize reduction 28, result has 72.8 percent of original size [2021-05-03 17:06:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 84 [2021-05-03 17:06:59,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:06:59,878 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-05-03 17:06:59,879 INFO L628 ElimStorePlain]: treesize reduction 53, result has 78.9 percent of original size [2021-05-03 17:06:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:59,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:59,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:06:59,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:06:59,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 112 [2021-05-03 17:07:00,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 3 xjuncts. [2021-05-03 17:07:00,509 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 75 [2021-05-03 17:07:00,510 INFO L628 ElimStorePlain]: treesize reduction 244, result has 41.5 percent of original size [2021-05-03 17:07:00,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 17:07:00,522 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 14 variables, input treesize:287, output treesize:114 [2021-05-03 17:07:00,772 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 17:07:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:07:00,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:07:00,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 17:07:00,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853284869] [2021-05-03 17:07:00,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 17:07:00,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:07:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 17:07:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:07:00,821 INFO L87 Difference]: Start difference. First operand 2244 states and 7899 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:07:01,333 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2021-05-03 17:07:01,574 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-05-03 17:07:01,938 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2021-05-03 17:07:06,415 WARN L205 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-05-03 17:07:06,702 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 17:07:06,919 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2021-05-03 17:07:07,128 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 17:07:07,295 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 17:07:11,730 WARN L205 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-05-03 17:07:16,299 WARN L205 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-05-03 17:07:20,767 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2021-05-03 17:07:23,652 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2021-05-03 17:07:28,157 WARN L205 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2021-05-03 17:07:32,900 WARN L205 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2021-05-03 17:07:33,473 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 17:07:33,874 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2021-05-03 17:07:34,084 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-05-03 17:07:34,667 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-05-03 17:07:35,293 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 17:07:35,733 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-05-03 17:07:36,064 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-05-03 17:07:57,461 WARN L205 SmtUtils]: Spent 21.32 s on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2021-05-03 17:07:57,982 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 17:07:58,733 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-05-03 17:07:59,055 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2021-05-03 17:07:59,558 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-03 17:07:59,798 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 17:08:00,251 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-05-03 17:08:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:00,410 INFO L93 Difference]: Finished difference Result 4034 states and 13369 transitions. [2021-05-03 17:08:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 17:08:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:08:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:00,420 INFO L225 Difference]: With dead ends: 4034 [2021-05-03 17:08:00,421 INFO L226 Difference]: Without dead ends: 4004 [2021-05-03 17:08:00,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 76960.8ms TimeCoverageRelationStatistics Valid=807, Invalid=3099, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 17:08:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2021-05-03 17:08:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 2260. [2021-05-03 17:08:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 3.522355024347056) internal successors, (7957), 2259 states have internal predecessors, (7957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 7957 transitions. [2021-05-03 17:08:00,466 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 7957 transitions. Word has length 29 [2021-05-03 17:08:00,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:00,466 INFO L480 AbstractCegarLoop]: Abstraction has 2260 states and 7957 transitions. [2021-05-03 17:08:00,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 7957 transitions. [2021-05-03 17:08:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:08:00,470 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:00,470 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:00,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable781 [2021-05-03 17:08:00,671 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:00,671 INFO L82 PathProgramCache]: Analyzing trace with hash -580502318, now seen corresponding path program 15 times [2021-05-03 17:08:00,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:00,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736490098] [2021-05-03 17:08:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:00,898 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 17:08:01,029 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-03 17:08:01,159 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 17:08:01,279 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-05-03 17:08:01,441 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 17:08:01,589 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 17:08:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:01,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736490098] [2021-05-03 17:08:01,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571609813] [2021-05-03 17:08:01,830 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 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 [2021-05-03 17:08:01,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:08:01,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:01,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 17:08:01,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:02,959 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 17:08:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:03,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:03,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:03,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,065 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 17:08:04,066 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-05-03 17:08:04,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 76 [2021-05-03 17:08:04,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:04,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:08:04,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:04,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 17:08:04,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,300 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-05-03 17:08:04,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-05-03 17:08:04,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,584 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 17:08:04,585 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-05-03 17:08:04,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 76 [2021-05-03 17:08:04,665 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:04,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:08:04,723 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:04,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,828 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-05-03 17:08:04,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-05-03 17:08:04,831 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:04,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:04,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:04,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:08:05,034 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 17:08:05,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:05,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 88 [2021-05-03 17:08:05,136 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-05-03 17:08:05,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,356 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-05-03 17:08:05,357 INFO L354 Elim1Store]: treesize reduction 30, result has 62.0 percent of original size [2021-05-03 17:08:05,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 58 [2021-05-03 17:08:05,395 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:05,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:05,630 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 17:08:05,631 INFO L354 Elim1Store]: treesize reduction 14, result has 82.3 percent of original size [2021-05-03 17:08:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 74 [2021-05-03 17:08:05,741 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:06,285 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-05-03 17:08:06,286 INFO L628 ElimStorePlain]: treesize reduction 275, result has 39.0 percent of original size [2021-05-03 17:08:06,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 17:08:06,290 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:604, output treesize:216 [2021-05-03 17:08:06,753 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 17:08:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:06,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:06,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-05-03 17:08:06,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186702026] [2021-05-03 17:08:06,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 17:08:06,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:06,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 17:08:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-03 17:08:06,937 INFO L87 Difference]: Start difference. First operand 2260 states and 7957 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:07,354 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 17:08:07,672 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 17:08:08,074 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-05-03 17:08:08,583 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-05-03 17:08:08,802 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-05-03 17:08:09,308 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 17:08:09,561 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-05-03 17:08:09,983 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-05-03 17:08:10,241 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 17:08:10,582 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-03 17:08:10,738 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-05-03 17:08:11,089 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 17:08:11,453 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 17:08:11,949 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-05-03 17:08:12,467 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 17:08:12,833 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 17:08:13,353 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-03 17:08:13,551 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 17:08:13,940 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-05-03 17:08:14,376 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 17:08:14,752 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-03 17:08:15,245 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-05-03 17:08:15,489 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 17:08:15,805 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 17:08:16,255 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-05-03 17:08:16,691 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 17:08:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:17,021 INFO L93 Difference]: Finished difference Result 3408 states and 11347 transitions. [2021-05-03 17:08:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 17:08:17,023 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:08:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:17,030 INFO L225 Difference]: With dead ends: 3408 [2021-05-03 17:08:17,030 INFO L226 Difference]: Without dead ends: 3343 [2021-05-03 17:08:17,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 10361.9ms TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 17:08:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-05-03 17:08:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2288. [2021-05-03 17:08:17,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.515959772627897) internal successors, (8041), 2287 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8041 transitions. [2021-05-03 17:08:17,067 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8041 transitions. Word has length 29 [2021-05-03 17:08:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:17,067 INFO L480 AbstractCegarLoop]: Abstraction has 2288 states and 8041 transitions. [2021-05-03 17:08:17,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8041 transitions. [2021-05-03 17:08:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:08:17,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:17,071 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:17,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:17,287 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash -517413926, now seen corresponding path program 16 times [2021-05-03 17:08:17,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:17,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943788116] [2021-05-03 17:08:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:17,628 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-03 17:08:17,760 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 17:08:17,908 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-05-03 17:08:18,083 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 17:08:18,251 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 17:08:18,404 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-03 17:08:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:18,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943788116] [2021-05-03 17:08:18,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608081783] [2021-05-03 17:08:18,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:08:18,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:08:18,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:18,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 17:08:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:19,427 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 17:08:19,680 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:08:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:19,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:19,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 17:08:19,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594836566] [2021-05-03 17:08:19,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 17:08:19,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 17:08:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:08:19,919 INFO L87 Difference]: Start difference. First operand 2288 states and 8041 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:20,302 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-05-03 17:08:20,762 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 17:08:20,956 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-03 17:08:21,572 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-05-03 17:08:21,979 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 17:08:23,130 WARN L205 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-05-03 17:08:23,399 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-05-03 17:08:23,849 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 17:08:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:08:23,937 INFO L93 Difference]: Finished difference Result 3178 states and 10668 transitions. [2021-05-03 17:08:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 17:08:23,939 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:08:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:08:23,946 INFO L225 Difference]: With dead ends: 3178 [2021-05-03 17:08:23,946 INFO L226 Difference]: Without dead ends: 3163 [2021-05-03 17:08:23,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4986.1ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 17:08:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-05-03 17:08:23,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2284. [2021-05-03 17:08:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 3.516863775733684) internal successors, (8029), 2283 states have internal predecessors, (8029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 8029 transitions. [2021-05-03 17:08:23,983 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 8029 transitions. Word has length 29 [2021-05-03 17:08:23,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:08:23,983 INFO L480 AbstractCegarLoop]: Abstraction has 2284 states and 8029 transitions. [2021-05-03 17:08:23,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:23,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 8029 transitions. [2021-05-03 17:08:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:08:23,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:08:23,987 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:08:24,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:08:24,193 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:08:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:08:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1600210838, now seen corresponding path program 17 times [2021-05-03 17:08:24,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:08:24,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434192218] [2021-05-03 17:08:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:08:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:08:24,425 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 17:08:24,563 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-05-03 17:08:24,711 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-05-03 17:08:24,859 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-05-03 17:08:24,998 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 17:08:25,185 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 17:08:25,347 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-03 17:08:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:25,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434192218] [2021-05-03 17:08:25,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601805765] [2021-05-03 17:08:25,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:08:25,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:08:25,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:08:25,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 17:08:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:08:26,635 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 17:08:26,974 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 17:08:27,297 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 17:08:27,609 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_75], 7=[v_prenex_74, v_prenex_73]} [2021-05-03 17:08:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:27,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:08:27,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:27,928 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 17:08:27,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:27,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:27,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:08:27,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:28,244 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 17:08:28,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,343 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:08:28,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 17:08:28,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:28,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:28,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-03 17:08:28,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:29,000 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-03 17:08:29,001 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-05-03 17:08:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:08:29,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-03 17:08:29,105 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:29,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:08:29,177 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 17:08:29,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-05-03 17:08:29,182 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:08:29,611 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 17:08:29,612 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-05-03 17:08:29,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 17:08:29,620 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:254, output treesize:81 [2021-05-03 17:08:30,033 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-05-03 17:08:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:08:30,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:08:30,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 17:08:30,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136990512] [2021-05-03 17:08:30,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 17:08:30,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:08:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 17:08:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:08:30,099 INFO L87 Difference]: Start difference. First operand 2284 states and 8029 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:08:30,855 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-05-03 17:08:31,056 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-03 17:08:31,242 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 17:08:31,515 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 17:08:39,943 WARN L205 SmtUtils]: Spent 8.27 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 17:08:40,195 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-05-03 17:08:40,406 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 17:08:40,626 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-05-03 17:08:57,457 WARN L205 SmtUtils]: Spent 16.61 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 17:09:05,973 WARN L205 SmtUtils]: Spent 8.39 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-05-03 17:09:33,329 WARN L205 SmtUtils]: Spent 26.82 s on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-05-03 17:09:33,921 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 17:09:34,121 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-05-03 17:09:34,329 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 17:09:35,226 WARN L205 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-05-03 17:09:36,100 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-05-03 17:09:37,047 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-05-03 17:09:38,108 WARN L205 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-05-03 17:09:38,780 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 17:09:38,989 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-05-03 17:09:39,863 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-03 17:09:40,130 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 17:09:40,993 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-05-03 17:09:41,773 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-05-03 17:09:42,172 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 17:09:43,096 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-05-03 17:09:43,494 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 17:09:43,804 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 17:09:44,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:44,073 INFO L93 Difference]: Finished difference Result 3169 states and 10709 transitions. [2021-05-03 17:09:44,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 17:09:44,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:09:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:44,080 INFO L225 Difference]: With dead ends: 3169 [2021-05-03 17:09:44,080 INFO L226 Difference]: Without dead ends: 3115 [2021-05-03 17:09:44,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 73881.2ms TimeCoverageRelationStatistics Valid=458, Invalid=2734, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 17:09:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-05-03 17:09:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2306. [2021-05-03 17:09:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.515401301518438) internal successors, (8103), 2305 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8103 transitions. [2021-05-03 17:09:44,114 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8103 transitions. Word has length 29 [2021-05-03 17:09:44,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:44,114 INFO L480 AbstractCegarLoop]: Abstraction has 2306 states and 8103 transitions. [2021-05-03 17:09:44,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8103 transitions. [2021-05-03 17:09:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:09:44,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:44,117 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:44,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1180 [2021-05-03 17:09:44,317 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:44,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 2024544714, now seen corresponding path program 18 times [2021-05-03 17:09:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:44,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159996444] [2021-05-03 17:09:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:44,608 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-05-03 17:09:44,796 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 17:09:45,010 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 17:09:45,176 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-03 17:09:45,329 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-05-03 17:09:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:45,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159996444] [2021-05-03 17:09:45,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692674211] [2021-05-03 17:09:45,749 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 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 [2021-05-03 17:09:45,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 17:09:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:09:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 17:09:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:46,643 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 17:09:46,895 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 17:09:47,236 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:09:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:47,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:09:47,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 17:09:47,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800595916] [2021-05-03 17:09:47,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 17:09:47,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:09:47,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 17:09:47,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:09:47,564 INFO L87 Difference]: Start difference. First operand 2306 states and 8103 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:47,826 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 17:09:47,989 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-05-03 17:09:49,944 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-05-03 17:09:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:09:50,327 INFO L93 Difference]: Finished difference Result 2856 states and 9793 transitions. [2021-05-03 17:09:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 17:09:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:09:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:09:50,335 INFO L225 Difference]: With dead ends: 2856 [2021-05-03 17:09:50,335 INFO L226 Difference]: Without dead ends: 2841 [2021-05-03 17:09:50,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 4230.2ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-05-03 17:09:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-05-03 17:09:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2296. [2021-05-03 17:09:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.5180827886710238) internal successors, (8074), 2295 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8074 transitions. [2021-05-03 17:09:50,364 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8074 transitions. Word has length 29 [2021-05-03 17:09:50,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:09:50,364 INFO L480 AbstractCegarLoop]: Abstraction has 2296 states and 8074 transitions. [2021-05-03 17:09:50,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:09:50,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8074 transitions. [2021-05-03 17:09:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:09:50,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:09:50,367 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:09:50,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-05-03 17:09:50,568 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:09:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:09:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1418429486, now seen corresponding path program 19 times [2021-05-03 17:09:50,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:09:50,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108989333] [2021-05-03 17:09:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:09:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:50,831 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-05-03 17:09:50,991 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-05-03 17:09:51,173 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-05-03 17:09:51,370 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 17:09:51,560 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 17:09:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:09:51,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108989333] [2021-05-03 17:09:51,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414964731] [2021-05-03 17:09:51,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:09:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:09:51,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:09:51,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:09:52,814 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 17:09:57,202 WARN L205 SmtUtils]: Spent 4.27 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 17:10:03,583 WARN L205 SmtUtils]: Spent 6.23 s on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 17:10:04,047 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_83, v_prenex_85], 7=[A, v_prenex_82, v_prenex_86, v_prenex_84]} [2021-05-03 17:10:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:04,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:10:04,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:10:04,462 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 17:10:04,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:04,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:10:04,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:10:04,839 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-03 17:10:04,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:04,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:04,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:04,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-03 17:10:04,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:10:05,264 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 17:10:05,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,386 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:10:05,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 17:10:05,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:10:05,675 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 17:10:05,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:05,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:05,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:05,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-03 17:10:05,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:10:06,074 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 17:10:06,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:06,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:06,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:06,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:10:06,183 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:10:06,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 17:10:06,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:10:06,442 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 17:10:06,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:10:06,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 17:10:06,447 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:224, output treesize:76 [2021-05-03 17:10:06,760 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-05-03 17:10:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:10:06,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:10:06,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 17:10:06,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655898394] [2021-05-03 17:10:06,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 17:10:06,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:10:06,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 17:10:06,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-05-03 17:10:06,898 INFO L87 Difference]: Start difference. First operand 2296 states and 8074 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:10:07,271 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-05-03 17:10:07,460 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-05-03 17:10:07,825 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 25 [2021-05-03 17:10:08,055 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-05-03 17:10:08,359 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-03 17:10:08,552 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 17:10:08,747 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-03 17:10:13,832 WARN L205 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-05-03 17:10:27,134 WARN L205 SmtUtils]: Spent 12.69 s on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-03 17:10:27,533 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-05-03 17:10:27,776 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 17:10:38,802 WARN L205 SmtUtils]: Spent 8.72 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-03 17:10:47,723 WARN L205 SmtUtils]: Spent 8.81 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-05-03 17:11:05,191 WARN L205 SmtUtils]: Spent 15.12 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-05-03 17:11:20,770 WARN L205 SmtUtils]: Spent 15.47 s on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-05-03 17:11:25,357 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 17:11:27,932 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-05-03 17:11:28,720 WARN L205 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 17:11:29,576 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 17:11:30,108 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 17:11:30,653 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-03 17:11:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:30,782 INFO L93 Difference]: Finished difference Result 3213 states and 11009 transitions. [2021-05-03 17:11:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 17:11:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:11:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:30,791 INFO L225 Difference]: With dead ends: 3213 [2021-05-03 17:11:30,791 INFO L226 Difference]: Without dead ends: 3198 [2021-05-03 17:11:30,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 83772.1ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 17:11:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-05-03 17:11:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 2313. [2021-05-03 17:11:30,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 3.5216262975778547) internal successors, (8142), 2312 states have internal predecessors, (8142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 8142 transitions. [2021-05-03 17:11:30,826 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 8142 transitions. Word has length 29 [2021-05-03 17:11:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:30,826 INFO L480 AbstractCegarLoop]: Abstraction has 2313 states and 8142 transitions. [2021-05-03 17:11:30,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 8142 transitions. [2021-05-03 17:11:30,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:11:30,829 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:30,829 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:31,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:31,030 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2103821890, now seen corresponding path program 41 times [2021-05-03 17:11:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:31,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468265678] [2021-05-03 17:11:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:31,261 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 17:11:31,460 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 17:11:31,701 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-05-03 17:11:31,953 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 17:11:32,158 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 17:11:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:32,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468265678] [2021-05-03 17:11:32,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10417020] [2021-05-03 17:11:32,683 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 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 [2021-05-03 17:11:32,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 17:11:32,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:32,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:11:32,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:33,532 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 17:11:33,755 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:11:34,065 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 17:11:34,413 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 17:11:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:35,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:35,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 17:11:35,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771894103] [2021-05-03 17:11:35,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 17:11:35,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:35,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 17:11:35,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:11:35,237 INFO L87 Difference]: Start difference. First operand 2313 states and 8142 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:35,863 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-05-03 17:11:36,104 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-05-03 17:11:36,502 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-05-03 17:11:37,123 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-05-03 17:11:37,394 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 17:11:37,868 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-05-03 17:11:38,224 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-05-03 17:11:38,608 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 17:11:39,081 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-05-03 17:11:39,514 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 17:11:39,704 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 17:11:40,047 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-03 17:11:40,489 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-03 17:11:40,663 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 17:11:41,232 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-05-03 17:11:41,665 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 17:11:42,023 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 17:11:42,255 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:11:43,207 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 17:11:43,522 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 17:11:44,055 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 17:11:44,501 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 17:11:45,232 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 17:11:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:11:45,554 INFO L93 Difference]: Finished difference Result 3606 states and 12159 transitions. [2021-05-03 17:11:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 17:11:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:11:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:11:45,565 INFO L225 Difference]: With dead ends: 3606 [2021-05-03 17:11:45,565 INFO L226 Difference]: Without dead ends: 3562 [2021-05-03 17:11:45,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 10358.8ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 17:11:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2021-05-03 17:11:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 2467. [2021-05-03 17:11:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 3.5158150851581507) internal successors, (8670), 2466 states have internal predecessors, (8670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 8670 transitions. [2021-05-03 17:11:45,611 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 8670 transitions. Word has length 29 [2021-05-03 17:11:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:11:45,611 INFO L480 AbstractCegarLoop]: Abstraction has 2467 states and 8670 transitions. [2021-05-03 17:11:45,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 8670 transitions. [2021-05-03 17:11:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:11:45,614 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:11:45,615 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:11:45,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:11:45,815 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:11:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:11:45,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1477937358, now seen corresponding path program 42 times [2021-05-03 17:11:45,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:11:45,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116624465] [2021-05-03 17:11:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:11:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:11:46,043 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-05-03 17:11:46,206 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 17:11:46,383 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-05-03 17:11:46,578 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 17:11:46,858 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-05-03 17:11:47,047 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-05-03 17:11:47,241 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-05-03 17:11:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:47,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116624465] [2021-05-03 17:11:47,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382751384] [2021-05-03 17:11:47,566 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 [2021-05-03 17:11:47,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 17:11:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:11:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 17:11:47,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:11:48,490 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:11:48,739 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 17:11:49,030 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 17:11:49,707 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 17:11:50,245 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_94], 27=[A], 44=[v_prenex_96]} [2021-05-03 17:11:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-05-03 17:11:50,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:11:50,806 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 17:11:50,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:11:50,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:50,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:11:50,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:11:50,996 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 17:11:50,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 17:11:51,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:11:51,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:51,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:11:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:51,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:51,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:11:51,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 38 [2021-05-03 17:11:51,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-05-03 17:11:52,067 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-05-03 17:11:52,069 INFO L628 ElimStorePlain]: treesize reduction 11, result has 95.1 percent of original size [2021-05-03 17:11:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:11:52,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:11:52,254 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 17:11:52,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 17:11:52,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:11:52,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:11:52,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 17 [2021-05-03 17:11:52,372 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:11:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 17:11:52,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:11:52,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:11:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 38 [2021-05-03 17:11:52,590 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:11:53,003 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 17:11:53,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:11:53,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 17:11:53,014 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:269, output treesize:51 [2021-05-03 17:11:53,363 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-05-03 17:11:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:11:53,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:11:53,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-05-03 17:11:53,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990003725] [2021-05-03 17:11:53,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 17:11:53,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:11:53,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 17:11:53,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-05-03 17:11:53,577 INFO L87 Difference]: Start difference. First operand 2467 states and 8670 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:11:53,951 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 17:11:54,139 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-05-03 17:11:54,482 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-05-03 17:11:54,862 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 17:11:55,492 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 17:11:55,721 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 17 [2021-05-03 17:11:56,158 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-05-03 17:11:56,595 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 17:11:57,063 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 17:11:57,790 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-05-03 17:11:58,152 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 17:11:58,591 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-05-03 17:11:59,282 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 17:11:59,905 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 17:12:00,517 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 17:12:00,994 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 17:12:01,229 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 17:12:01,871 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-03 17:12:02,397 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-05-03 17:12:03,223 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-05-03 17:12:03,801 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 17:12:04,179 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 17:12:05,141 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 17:12:05,750 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-05-03 17:12:06,249 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 17:12:07,078 WARN L205 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 17:12:07,752 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-05-03 17:12:08,071 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 17:12:08,683 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 17:12:09,279 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 17:12:09,784 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-03 17:12:10,980 WARN L205 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 17:12:13,059 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-05-03 17:12:14,093 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-05-03 17:12:15,366 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 17:12:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:15,671 INFO L93 Difference]: Finished difference Result 4348 states and 14490 transitions. [2021-05-03 17:12:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 17:12:15,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:12:15,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:15,686 INFO L225 Difference]: With dead ends: 4348 [2021-05-03 17:12:15,686 INFO L226 Difference]: Without dead ends: 4295 [2021-05-03 17:12:15,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 20606.9ms TimeCoverageRelationStatistics Valid=790, Invalid=3370, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 17:12:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2021-05-03 17:12:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 2578. [2021-05-03 17:12:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 3.514163756305782) internal successors, (9056), 2577 states have internal predecessors, (9056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 9056 transitions. [2021-05-03 17:12:15,729 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 9056 transitions. Word has length 29 [2021-05-03 17:12:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:15,729 INFO L480 AbstractCegarLoop]: Abstraction has 2578 states and 9056 transitions. [2021-05-03 17:12:15,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 9056 transitions. [2021-05-03 17:12:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:12:15,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:15,733 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:15,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1294 [2021-05-03 17:12:15,933 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:15,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2131155038, now seen corresponding path program 43 times [2021-05-03 17:12:15,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:15,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482512525] [2021-05-03 17:12:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:16,209 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 17:12:16,459 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 17:12:16,704 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-05-03 17:12:16,944 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 17:12:17,171 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 17:12:17,488 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-05-03 17:12:17,775 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 17:12:17,937 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 17:12:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:18,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482512525] [2021-05-03 17:12:18,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882410461] [2021-05-03 17:12:18,160 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 [2021-05-03 17:12:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:18,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:12:18,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:19,098 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:12:19,407 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 17:12:20,128 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 17:12:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:20,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:20,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-05-03 17:12:20,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332028910] [2021-05-03 17:12:20,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 17:12:20,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:20,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 17:12:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-05-03 17:12:20,855 INFO L87 Difference]: Start difference. First operand 2578 states and 9056 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:21,314 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 17:12:22,089 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 17:12:22,669 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 17:12:23,186 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-05-03 17:12:23,764 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 17:12:24,396 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-05-03 17:12:24,854 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 17:12:25,414 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 17:12:26,034 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-03 17:12:26,648 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-05-03 17:12:27,108 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 17:12:27,403 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 17:12:27,703 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 17:12:28,512 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:12:28,765 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 17:12:29,379 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-05-03 17:12:29,791 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 17:12:30,223 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 17:12:31,028 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-05-03 17:12:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:12:31,819 INFO L93 Difference]: Finished difference Result 3929 states and 13287 transitions. [2021-05-03 17:12:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 17:12:31,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:12:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:12:31,833 INFO L225 Difference]: With dead ends: 3929 [2021-05-03 17:12:31,833 INFO L226 Difference]: Without dead ends: 3867 [2021-05-03 17:12:31,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 11907.2ms TimeCoverageRelationStatistics Valid=401, Invalid=1669, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 17:12:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-05-03 17:12:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 2626. [2021-05-03 17:12:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 3.5142857142857142) internal successors, (9225), 2625 states have internal predecessors, (9225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 9225 transitions. [2021-05-03 17:12:31,892 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 9225 transitions. Word has length 29 [2021-05-03 17:12:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:12:31,892 INFO L480 AbstractCegarLoop]: Abstraction has 2626 states and 9225 transitions. [2021-05-03 17:12:31,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 9225 transitions. [2021-05-03 17:12:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:12:31,896 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:12:31,896 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:12:32,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-05-03 17:12:32,097 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:12:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:12:32,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1316037810, now seen corresponding path program 20 times [2021-05-03 17:12:32,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:12:32,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757398866] [2021-05-03 17:12:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:12:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:12:32,850 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 17:12:33,314 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 17:12:33,749 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 17:12:34,217 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 17:12:34,380 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 17:12:34,534 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 17:12:34,729 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 17:12:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:35,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757398866] [2021-05-03 17:12:35,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5908063] [2021-05-03 17:12:35,043 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 [2021-05-03 17:12:35,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 17:12:35,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:12:35,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 17:12:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:12:36,146 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:12:36,500 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 17:12:36,797 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 17:12:37,500 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 17:12:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:12:37,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:12:37,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-05-03 17:12:37,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358040153] [2021-05-03 17:12:37,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 17:12:37,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:12:37,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 17:12:37,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:12:37,676 INFO L87 Difference]: Start difference. First operand 2626 states and 9225 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:12:38,259 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-05-03 17:12:38,548 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-05-03 17:12:39,549 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 17:12:40,322 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2021-05-03 17:12:40,575 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-05-03 17:12:40,836 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 17:12:41,805 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-05-03 17:12:43,170 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-05-03 17:12:44,433 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2021-05-03 17:12:45,108 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-05-03 17:12:46,150 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-05-03 17:12:46,997 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-05-03 17:12:47,544 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-05-03 17:12:47,792 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 17:12:48,487 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 17:12:49,671 WARN L205 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-05-03 17:12:50,466 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 17:12:50,722 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 17:12:52,163 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-05-03 17:12:52,880 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-05-03 17:12:53,615 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-05-03 17:12:54,171 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2021-05-03 17:12:55,145 WARN L205 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 17:12:56,399 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-05-03 17:12:57,175 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-05-03 17:12:58,006 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 17:12:58,390 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 17:12:59,097 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-05-03 17:12:59,366 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 17:12:59,546 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 17:12:59,914 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-03 17:13:01,595 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-05-03 17:13:02,164 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2021-05-03 17:13:03,171 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-05-03 17:13:03,992 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-03 17:13:04,692 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-05-03 17:13:05,094 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 17:13:05,622 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 17:13:06,006 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 17:13:06,426 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 17:13:07,374 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-05-03 17:13:08,202 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-05-03 17:13:09,060 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2021-05-03 17:13:09,697 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-05-03 17:13:10,751 WARN L205 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-05-03 17:13:11,682 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-05-03 17:13:12,860 WARN L205 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-03 17:13:14,386 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-05-03 17:13:15,180 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-05-03 17:13:15,514 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 17:13:16,666 WARN L205 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-05-03 17:13:17,625 WARN L205 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-05-03 17:13:18,295 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-05-03 17:13:19,299 WARN L205 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-05-03 17:13:20,055 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 17:13:20,672 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-05-03 17:13:21,204 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 17:13:21,901 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 17:13:22,654 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 17:13:23,830 WARN L205 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-05-03 17:13:24,897 WARN L205 SmtUtils]: Spent 953.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-05-03 17:13:25,620 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-03 17:13:25,777 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 17:13:26,181 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-05-03 17:13:28,276 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-05-03 17:13:29,325 WARN L205 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2021-05-03 17:13:30,119 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-05-03 17:13:30,971 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-05-03 17:13:32,419 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-05-03 17:13:33,859 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-05-03 17:13:35,335 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-05-03 17:13:37,347 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-05-03 17:13:38,558 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-05-03 17:13:39,148 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-05-03 17:13:40,312 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 17:13:41,147 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-05-03 17:13:41,849 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 48 [2021-05-03 17:13:42,472 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-03 17:13:42,963 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-05-03 17:13:43,344 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-05-03 17:13:43,509 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 17:13:43,846 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 17:13:46,181 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2021-05-03 17:13:48,232 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-05-03 17:13:48,961 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-05-03 17:13:49,914 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 17:13:50,698 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-05-03 17:13:50,959 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 17:13:52,005 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-05-03 17:13:52,910 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-05-03 17:13:53,491 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 17:13:54,664 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-05-03 17:13:55,583 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-05-03 17:13:56,353 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 17:13:57,268 WARN L205 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-05-03 17:13:58,253 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-05-03 17:13:59,394 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-03 17:14:00,345 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-05-03 17:14:01,150 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-05-03 17:14:02,573 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2021-05-03 17:14:04,012 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-05-03 17:14:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:14:04,924 INFO L93 Difference]: Finished difference Result 6000 states and 19541 transitions. [2021-05-03 17:14:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-03 17:14:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:14:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:14:04,939 INFO L225 Difference]: With dead ends: 6000 [2021-05-03 17:14:04,939 INFO L226 Difference]: Without dead ends: 5985 [2021-05-03 17:14:04,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6734 ImplicationChecksByTransitivity, 78826.9ms TimeCoverageRelationStatistics Valid=1891, Invalid=14879, Unknown=0, NotChecked=0, Total=16770 [2021-05-03 17:14:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5985 states. [2021-05-03 17:14:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5985 to 2674. [2021-05-03 17:14:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 3.5095398428731763) internal successors, (9381), 2673 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 9381 transitions. [2021-05-03 17:14:04,990 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 9381 transitions. Word has length 29 [2021-05-03 17:14:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:14:04,990 INFO L480 AbstractCegarLoop]: Abstraction has 2674 states and 9381 transitions. [2021-05-03 17:14:04,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 9381 transitions. [2021-05-03 17:14:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:14:04,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:14:04,994 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:14:05,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1329 [2021-05-03 17:14:05,194 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:14:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:14:05,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1804724658, now seen corresponding path program 21 times [2021-05-03 17:14:05,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:14:05,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583570036] [2021-05-03 17:14:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:14:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:14:05,966 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 17:14:06,428 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 17:14:06,845 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 17:14:07,260 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 17:14:07,719 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-05-03 17:14:07,904 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 17:14:08,088 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 17:14:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:08,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583570036] [2021-05-03 17:14:08,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437552424] [2021-05-03 17:14:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 17:14:08,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 17:14:08,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:14:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 17:14:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:14:09,366 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 17:14:09,790 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 17:14:10,472 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 17:14:38,170 WARN L205 SmtUtils]: Spent 25.03 s on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2021-05-03 17:14:45,211 WARN L205 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2021-05-03 17:14:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:14:45,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:14:45,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-05-03 17:14:45,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689966293] [2021-05-03 17:14:45,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 17:14:45,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:14:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 17:14:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:14:45,525 INFO L87 Difference]: Start difference. First operand 2674 states and 9381 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:14:46,800 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 17:14:47,370 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 17:14:47,918 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-05-03 17:14:48,502 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 17:14:49,082 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2021-05-03 17:14:49,463 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2021-05-03 17:14:50,557 WARN L205 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-05-03 17:14:51,966 WARN L205 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2021-05-03 17:14:52,635 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-05-03 17:14:53,125 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 37 [2021-05-03 17:14:54,269 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2021-05-03 17:14:55,252 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-05-03 17:14:55,831 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-05-03 17:14:56,133 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 17:14:56,668 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-05-03 17:14:57,829 WARN L205 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-05-03 17:14:59,362 WARN L205 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-05-03 17:15:00,420 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2021-05-03 17:15:01,695 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2021-05-03 17:15:02,519 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2021-05-03 17:15:04,147 WARN L205 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-05-03 17:15:04,998 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-05-03 17:15:05,733 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-05-03 17:15:06,328 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2021-05-03 17:15:07,772 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2021-05-03 17:15:08,454 WARN L205 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-05-03 17:15:09,081 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-05-03 17:15:09,950 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 17:15:10,294 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 17:15:10,838 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-03 17:15:11,223 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2021-05-03 17:15:11,503 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 17:15:11,670 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-05-03 17:15:12,994 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-05-03 17:15:14,150 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-05-03 17:15:15,720 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-05-03 17:15:16,356 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-05-03 17:15:17,449 WARN L205 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-05-03 17:15:18,404 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-05-03 17:15:19,083 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2021-05-03 17:15:22,858 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-05-03 17:15:24,562 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2021-05-03 17:15:26,376 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-05-03 17:15:27,564 WARN L205 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-05-03 17:15:28,404 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 17:15:28,783 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 17:15:29,519 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 17:15:30,339 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-05-03 17:15:30,987 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-05-03 17:15:31,650 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 49 [2021-05-03 17:15:32,085 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-05-03 17:15:32,458 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-05-03 17:15:33,784 WARN L205 SmtUtils]: Spent 974.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-05-03 17:15:35,272 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2021-05-03 17:15:39,280 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 116 DAG size of output: 87 [2021-05-03 17:15:41,449 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2021-05-03 17:15:43,606 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-05-03 17:15:44,615 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-05-03 17:15:46,066 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-05-03 17:15:47,125 WARN L205 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-05-03 17:15:47,919 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2021-05-03 17:15:49,537 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2021-05-03 17:16:04,887 WARN L205 SmtUtils]: Spent 13.12 s on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2021-05-03 17:16:08,535 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2021-05-03 17:16:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 17:16:09,063 INFO L93 Difference]: Finished difference Result 5042 states and 16945 transitions. [2021-05-03 17:16:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-03 17:16:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 17:16:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 17:16:09,076 INFO L225 Difference]: With dead ends: 5042 [2021-05-03 17:16:09,076 INFO L226 Difference]: Without dead ends: 5027 [2021-05-03 17:16:09,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 109632.1ms TimeCoverageRelationStatistics Valid=1172, Invalid=7945, Unknown=3, NotChecked=0, Total=9120 [2021-05-03 17:16:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5027 states. [2021-05-03 17:16:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5027 to 2682. [2021-05-03 17:16:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2681 states have (on average 3.507273405445729) internal successors, (9403), 2681 states have internal predecessors, (9403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 9403 transitions. [2021-05-03 17:16:09,119 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 9403 transitions. Word has length 29 [2021-05-03 17:16:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 17:16:09,119 INFO L480 AbstractCegarLoop]: Abstraction has 2682 states and 9403 transitions. [2021-05-03 17:16:09,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:09,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 9403 transitions. [2021-05-03 17:16:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 17:16:09,122 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 17:16:09,122 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 17:16:09,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:16:09,323 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 17:16:09,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 17:16:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1829857094, now seen corresponding path program 22 times [2021-05-03 17:16:09,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 17:16:09,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330734368] [2021-05-03 17:16:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 17:16:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 17:16:10,211 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 17:16:10,685 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 17:16:11,099 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-05-03 17:16:11,563 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 17:16:12,040 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-05-03 17:16:12,246 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 17:16:12,409 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 17:16:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:12,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330734368] [2021-05-03 17:16:12,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502205130] [2021-05-03 17:16:12,731 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 [2021-05-03 17:16:12,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 17:16:12,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 17:16:12,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 17:16:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 17:16:13,668 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 17:16:18,293 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 17:16:18,826 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 17:16:19,508 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 17:16:21,247 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-05-03 17:16:21,535 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_119, v_prenex_120], 7=[v_prenex_118, A, v_prenex_121, v_prenex_122]} [2021-05-03 17:16:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:21,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:21,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:21,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:21,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:21,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:16:21,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:22,401 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-03 17:16:22,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:22,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:22,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:22,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:22,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-05-03 17:16:22,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:23,170 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 17:16:23,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,330 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:16:23,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 17:16:23,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:23,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:23,476 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:16:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 17:16:23,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:24,664 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-05-03 17:16:24,665 INFO L628 ElimStorePlain]: treesize reduction 27, result has 90.2 percent of original size [2021-05-03 17:16:24,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:24,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:24,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:24,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:24,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:24,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-03 17:16:24,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:25,405 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 17:16:25,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:25,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:25,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:25,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:25,543 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 17:16:25,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 17:16:25,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:26,102 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 17:16:26,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:26,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-03 17:16:26,325 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 17:16:26,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 17:16:26,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-05-03 17:16:26,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 17:16:27,395 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-05-03 17:16:27,397 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.0 percent of original size [2021-05-03 17:16:27,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 17:16:27,409 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-05-03 17:16:28,201 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-05-03 17:16:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 17:16:28,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 17:16:28,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-05-03 17:16:28,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321677317] [2021-05-03 17:16:28,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 17:16:28,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 17:16:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 17:16:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-05-03 17:16:28,383 INFO L87 Difference]: Start difference. First operand 2682 states and 9403 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 17:16:29,452 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 17:16:29,939 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-05-03 17:16:30,604 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 17:16:30,952 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-05-03 17:16:31,310 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 17:16:44,014 WARN L205 SmtUtils]: Spent 12.51 s on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2021-05-03 17:16:44,398 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2021-05-03 17:16:45,685 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-05-03 17:16:55,393 WARN L205 SmtUtils]: Spent 9.29 s on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-05-03 17:17:10,605 WARN L205 SmtUtils]: Spent 15.08 s on a formula simplification. DAG size of input: 101 DAG size of output: 51 Received shutdown request... [2021-05-03 17:17:17,024 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-05-03 17:17:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 17:17:17,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1348,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 17:17:17,225 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 17:17:17,228 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 17:17:17,229 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 05:17:17 BasicIcfg [2021-05-03 17:17:17,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 17:17:17,229 INFO L168 Benchmark]: Toolchain (without parser) took 858858.03 ms. Allocated memory was 367.0 MB in the beginning and 549.5 MB in the end (delta: 182.5 MB). Free memory was 346.7 MB in the beginning and 318.6 MB in the end (delta: 28.1 MB). Peak memory consumption was 213.5 MB. Max. memory is 16.0 GB. [2021-05-03 17:17:17,229 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory was 348.0 MB in the beginning and 347.9 MB in the end (delta: 126.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 17:17:17,229 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.65 ms. Allocated memory is still 367.0 MB. Free memory was 346.7 MB in the beginning and 345.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 17:17:17,229 INFO L168 Benchmark]: Boogie Preprocessor took 17.01 ms. Allocated memory is still 367.0 MB. Free memory was 345.2 MB in the beginning and 344.3 MB in the end (delta: 930.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 17:17:17,229 INFO L168 Benchmark]: RCFGBuilder took 254.33 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 331.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 17:17:17,229 INFO L168 Benchmark]: TraceAbstraction took 858561.04 ms. Allocated memory was 367.0 MB in the beginning and 549.5 MB in the end (delta: 182.5 MB). Free memory was 330.5 MB in the beginning and 318.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 196.7 MB. Max. memory is 16.0 GB. [2021-05-03 17:17:17,230 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory was 348.0 MB in the beginning and 347.9 MB in the end (delta: 126.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.65 ms. Allocated memory is still 367.0 MB. Free memory was 346.7 MB in the beginning and 345.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.01 ms. Allocated memory is still 367.0 MB. Free memory was 345.2 MB in the beginning and 344.3 MB in the end (delta: 930.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 254.33 ms. Allocated memory is still 367.0 MB. Free memory was 344.1 MB in the beginning and 331.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 858561.04 ms. Allocated memory was 367.0 MB in the beginning and 549.5 MB in the end (delta: 182.5 MB). Free memory was 330.5 MB in the beginning and 318.6 MB in the end (delta: 11.9 MB). Peak memory consumption was 196.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 69). Cancelled while BasicCegarLoop was constructing difference of abstraction (2682states) and FLOYD_HOARE automaton (currently 20 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 92 for 6285ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 858430.6ms, OverallIterations: 103, TraceHistogramMax: 2, EmptinessCheckTime: 236.9ms, AutomataDifference: 635302.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4215 SDtfs, 24580 SDslu, 28905 SDs, 0 SdLazy, 49197 SolverSat, 4208 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 49365.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5593 GetRequests, 2039 SyntacticMatches, 77 SemanticMatches, 3476 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55422 ImplicationChecksByTransitivity, 697561.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2682occurred in iteration=102, InterpolantAutomatonStates: 2902, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2392.0ms AutomataMinimizationTime, 102 MinimizatonAttempts, 88716 StatesRemovedByMinimization, 102 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 322.1ms SsaConstructionTime, 887.7ms SatisfiabilityAnalysisTime, 197812.9ms InterpolantComputationTime, 5356 NumberOfCodeBlocks, 5356 NumberOfCodeBlocksAsserted, 310 NumberOfCheckSat, 5158 ConstructedInterpolants, 80 QuantifiedInterpolants, 63312 SizeOfPredicates, 415 NumberOfNonLiveVariables, 5554 ConjunctsInSsa, 1066 ConjunctsInUnsatCore, 198 InterpolantComputations, 8 PerfectInterpolantSequences, 245/951 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process !SESSION 2021-05-03 17:02:56.879 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-05-03 17:17:17.455 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d11f26f39/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438)