/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/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 05:15:50,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 05:15:50,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 05:15:50,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 05:15:50,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 05:15:50,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 05:15:50,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 05:15:50,963 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 [2021-04-15 05:15:50,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 05:15:50,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 05:15:50,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 05:15:50,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 05:15:51,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 05:15:51,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 05:15:51,002 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 05:15:51,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 05:15:51,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 05:15:51,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 05:15:51,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 05:15:51,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 05:15:51,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 05:15:51,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 05:15:51,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 05:15:51,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 05:15:51,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 05:15:51,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 05:15:51,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 05:15:51,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 05:15:51,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 05:15:51,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 05:15:51,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 05:15:51,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 05:15:51,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 05:15:51,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 05:15:51,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 05:15:51,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 05:15:51,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 05:15:51,006 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 05:15:51,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 05:15:51,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 05:15:51,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 05:15:51,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 05:15:51,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 05:15:51,322 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 05:15:51,323 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 05:15:51,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-04-15 05:15:51,324 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-04-15 05:15:51,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 05:15:51,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 05:15:51,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 05:15:51,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 05:15:51,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 05:15:51,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 05:15:51,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 05:15:51,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 05:15:51,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 05:15:51,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/1) ... [2021-04-15 05:15:51,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 05:15:51,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 05:15:51,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 05:15:51,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 05:15:51,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (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 [2021-04-15 05:15:51,488 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 05:15:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 05:15:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 05:15:51,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 05:15:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 05:15:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 05:15:51,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 05:15:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 05:15:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 05:15:51,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 05:15:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 05:15:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 05:15:51,491 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 05:15:51,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 05:15:51,691 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 05:15:51,693 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:15:51 BoogieIcfgContainer [2021-04-15 05:15:51,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 05:15:51,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 05:15:51,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 05:15:51,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 05:15:51,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 05:15:51" (1/2) ... [2021-04-15 05:15:51,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c9e2db and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 05:15:51, skipping insertion in model container [2021-04-15 05:15:51,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 05:15:51" (2/2) ... [2021-04-15 05:15:51,698 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-04-15 05:15:51,702 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 05:15:51,702 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 05:15:51,725 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 05:15:51,726 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 05:15:51,773 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 05:15:51,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 05:15:51,813 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 05:15:51,813 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 05:15:51,814 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 05:15:51,814 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 05:15:51,814 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 05:15:51,816 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 05:15:51,816 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 05:15:51,816 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 05:15:51,823 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-04-15 05:15:51,846 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 05:15:51,855 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:51,856 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] [2021-04-15 05:15:51,859 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:51,864 INFO L82 PathProgramCache]: Analyzing trace with hash -482426042, now seen corresponding path program 1 times [2021-04-15 05:15:51,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:51,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939624657] [2021-04-15 05:15:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:52,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939624657] [2021-04-15 05:15:52,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:15:52,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:15:52,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080218340] [2021-04-15 05:15:52,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 05:15:52,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 05:15:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 05:15:52,064 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:52,135 INFO L93 Difference]: Finished difference Result 135 states and 376 transitions. [2021-04-15 05:15:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 05:15:52,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 05:15:52,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:52,149 INFO L225 Difference]: With dead ends: 135 [2021-04-15 05:15:52,149 INFO L226 Difference]: Without dead ends: 135 [2021-04-15 05:15:52,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:15:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-04-15 05:15:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-04-15 05:15:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-04-15 05:15:52,217 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-04-15 05:15:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:52,218 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-04-15 05:15:52,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-04-15 05:15:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 05:15:52,221 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:52,221 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] [2021-04-15 05:15:52,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 05:15:52,222 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1659723100, now seen corresponding path program 1 times [2021-04-15 05:15:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:52,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135882946] [2021-04-15 05:15:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:15:52,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135882946] [2021-04-15 05:15:52,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 05:15:52,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 05:15:52,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634547373] [2021-04-15 05:15:52,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 05:15:52,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:52,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 05:15:52,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 05:15:52,301 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:52,346 INFO L93 Difference]: Finished difference Result 185 states and 524 transitions. [2021-04-15 05:15:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 05:15:52,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 05:15:52,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:52,349 INFO L225 Difference]: With dead ends: 185 [2021-04-15 05:15:52,350 INFO L226 Difference]: Without dead ends: 185 [2021-04-15 05:15:52,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 05:15:52,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-04-15 05:15:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2021-04-15 05:15:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-04-15 05:15:52,374 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-04-15 05:15:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:52,375 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-04-15 05:15:52,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-04-15 05:15:52,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:15:52,376 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:52,376 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] [2021-04-15 05:15:52,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 05:15:52,376 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-04-15 05:15:52,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:52,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695906933] [2021-04-15 05:15:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:52,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695906933] [2021-04-15 05:15:52,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445962868] [2021-04-15 05:15:52,674 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 [2021-04-15 05:15:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:15:52,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:53,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:15:53,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:53,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:53,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:15:53,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-04-15 05:15:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:53,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:53,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 05:15:53,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526562845] [2021-04-15 05:15:53,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:15:53,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:53,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:15:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:15:53,132 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:53,640 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-04-15 05:15:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 05:15:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:15:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:53,647 INFO L225 Difference]: With dead ends: 395 [2021-04-15 05:15:53,648 INFO L226 Difference]: Without dead ends: 280 [2021-04-15 05:15:53,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:15:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-04-15 05:15:53,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-04-15 05:15:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 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) [2021-04-15 05:15:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-04-15 05:15:53,662 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-04-15 05:15:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:53,662 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-04-15 05:15:53,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-04-15 05:15:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 05:15:53,665 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:53,665 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] [2021-04-15 05:15:53,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-04-15 05:15:53,870 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:53,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:53,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-04-15 05:15:53,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:53,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648027303] [2021-04-15 05:15:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648027303] [2021-04-15 05:15:54,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807719859] [2021-04-15 05:15:54,162 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 [2021-04-15 05:15:54,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:15:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:15:54,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:54,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:15:54,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:54,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:54,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:15:54,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-04-15 05:15:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:54,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:54,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:15:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562100217] [2021-04-15 05:15:54,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:15:54,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:15:54,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:15:54,482 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:55,593 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-04-15 05:15:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 05:15:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 05:15:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:55,598 INFO L225 Difference]: With dead ends: 639 [2021-04-15 05:15:55,598 INFO L226 Difference]: Without dead ends: 546 [2021-04-15 05:15:55,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1066.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:15:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-04-15 05:15:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-04-15 05:15:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-04-15 05:15:55,621 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-04-15 05:15:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:55,621 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-04-15 05:15:55,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-04-15 05:15:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:55,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:55,623 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] [2021-04-15 05:15:55,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:55,844 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-04-15 05:15:55,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:55,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111991078] [2021-04-15 05:15:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:55,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111991078] [2021-04-15 05:15:55,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111039559] [2021-04-15 05:15:55,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:55,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:15:55,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:55,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:15:55,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:56,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:15:56,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:15:56,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:15:56,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:15:56,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-04-15 05:15:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:15:56,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:56,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 05:15:56,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453066243] [2021-04-15 05:15:56,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:15:56,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:56,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:15:56,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:15:56,178 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:57,574 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-04-15 05:15:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 05:15:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:57,581 INFO L225 Difference]: With dead ends: 1001 [2021-04-15 05:15:57,581 INFO L226 Difference]: Without dead ends: 966 [2021-04-15 05:15:57,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 853.7ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:15:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-04-15 05:15:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-04-15 05:15:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-04-15 05:15:57,599 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-04-15 05:15:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:57,600 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-04-15 05:15:57,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-04-15 05:15:57,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:57,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:57,606 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] [2021-04-15 05:15:57,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:57,820 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-04-15 05:15:57,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:57,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222873662] [2021-04-15 05:15:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:57,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222873662] [2021-04-15 05:15:57,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371187601] [2021-04-15 05:15:57,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:57,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:15:57,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:15:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:58,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:58,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:15:58,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056299093] [2021-04-15 05:15:58,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:15:58,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:58,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:15:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:15:58,030 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:15:58,874 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-04-15 05:15:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:15:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:15:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:15:58,881 INFO L225 Difference]: With dead ends: 1201 [2021-04-15 05:15:58,881 INFO L226 Difference]: Without dead ends: 1201 [2021-04-15 05:15:58,882 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:15:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-04-15 05:15:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-04-15 05:15:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-04-15 05:15:58,899 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-04-15 05:15:58,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:15:58,899 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-04-15 05:15:58,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:15:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-04-15 05:15:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:15:58,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:15:58,901 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] [2021-04-15 05:15:59,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:59,117 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:15:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:15:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-04-15 05:15:59,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:15:59,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169562789] [2021-04-15 05:15:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:15:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:15:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:59,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169562789] [2021-04-15 05:15:59,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835498365] [2021-04-15 05:15:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:15:59,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:15:59,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:15:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:15:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:15:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:15:59,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:15:59,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:15:59,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823895993] [2021-04-15 05:15:59,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:15:59,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:15:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:15:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:15:59,329 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:00,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:00,335 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-04-15 05:16:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:16:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:00,344 INFO L225 Difference]: With dead ends: 1858 [2021-04-15 05:16:00,344 INFO L226 Difference]: Without dead ends: 1858 [2021-04-15 05:16:00,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 653.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:16:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-04-15 05:16:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-04-15 05:16:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-04-15 05:16:00,370 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-04-15 05:16:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:00,371 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-04-15 05:16:00,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-04-15 05:16:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:00,373 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:00,373 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] [2021-04-15 05:16:00,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-04-15 05:16:00,589 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-04-15 05:16:00,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:00,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043168390] [2021-04-15 05:16:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:00,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043168390] [2021-04-15 05:16:00,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169525617] [2021-04-15 05:16:00,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:00,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:16:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:00,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:00,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:16:00,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100340370] [2021-04-15 05:16:00,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:16:00,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:00,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:16:00,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:16:00,762 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:01,404 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-04-15 05:16:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:16:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:01,412 INFO L225 Difference]: With dead ends: 1674 [2021-04-15 05:16:01,412 INFO L226 Difference]: Without dead ends: 1670 [2021-04-15 05:16:01,412 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 05:16:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-04-15 05:16:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-04-15 05:16:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-04-15 05:16:01,440 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-04-15 05:16:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:01,441 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-04-15 05:16:01,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-04-15 05:16:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:01,442 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:01,442 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] [2021-04-15 05:16:01,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:01,663 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:01,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-04-15 05:16:01,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:01,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759235533] [2021-04-15 05:16:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:01,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759235533] [2021-04-15 05:16:01,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455720875] [2021-04-15 05:16:01,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:01,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:01,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:16:01,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367856615] [2021-04-15 05:16:01,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:16:01,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:01,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:16:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:16:01,809 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:02,441 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-04-15 05:16:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:16:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:02,450 INFO L225 Difference]: With dead ends: 1844 [2021-04-15 05:16:02,450 INFO L226 Difference]: Without dead ends: 1844 [2021-04-15 05:16:02,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:16:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-04-15 05:16:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-04-15 05:16:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-04-15 05:16:02,473 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-04-15 05:16:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:02,473 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-04-15 05:16:02,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-04-15 05:16:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:02,474 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:02,474 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] [2021-04-15 05:16:02,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:02,696 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:02,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-04-15 05:16:02,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:02,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178196230] [2021-04-15 05:16:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:02,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178196230] [2021-04-15 05:16:02,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262593827] [2021-04-15 05:16:02,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:02,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:02,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:02,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:02,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 05:16:02,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715932389] [2021-04-15 05:16:02,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:16:02,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:16:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:16:02,894 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:03,381 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-04-15 05:16:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 05:16:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:03,388 INFO L225 Difference]: With dead ends: 1308 [2021-04-15 05:16:03,388 INFO L226 Difference]: Without dead ends: 1308 [2021-04-15 05:16:03,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 05:16:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-04-15 05:16:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-04-15 05:16:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-04-15 05:16:03,406 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-04-15 05:16:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:03,406 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-04-15 05:16:03,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-04-15 05:16:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:03,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:03,407 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] [2021-04-15 05:16:03,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 05:16:03,621 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:03,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-04-15 05:16:03,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:03,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565448086] [2021-04-15 05:16:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:03,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565448086] [2021-04-15 05:16:03,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177607395] [2021-04-15 05:16:03,674 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 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 [2021-04-15 05:16:03,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:16:03,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:03,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:03,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:16:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646117272] [2021-04-15 05:16:03,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:16:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:03,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:16:03,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:16:03,768 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:04,146 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-04-15 05:16:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:16:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:04,152 INFO L225 Difference]: With dead ends: 1124 [2021-04-15 05:16:04,152 INFO L226 Difference]: Without dead ends: 1120 [2021-04-15 05:16:04,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:16:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-04-15 05:16:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-04-15 05:16:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-04-15 05:16:04,166 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-04-15 05:16:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:04,167 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-04-15 05:16:04,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-04-15 05:16:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:04,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:04,168 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] [2021-04-15 05:16:04,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:04,386 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-04-15 05:16:04,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:04,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811318548] [2021-04-15 05:16:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:04,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811318548] [2021-04-15 05:16:04,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622083675] [2021-04-15 05:16:04,425 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 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 [2021-04-15 05:16:04,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:04,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:04,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:04,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 05:16:04,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682335305] [2021-04-15 05:16:04,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 05:16:04,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 05:16:04,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 05:16:04,543 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:04,950 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-04-15 05:16:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 05:16:04,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:04,955 INFO L225 Difference]: With dead ends: 1207 [2021-04-15 05:16:04,955 INFO L226 Difference]: Without dead ends: 1207 [2021-04-15 05:16:04,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:16:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-04-15 05:16:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-04-15 05:16:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-04-15 05:16:04,970 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-04-15 05:16:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:04,970 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-04-15 05:16:04,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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) [2021-04-15 05:16:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-04-15 05:16:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:04,972 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:04,972 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] [2021-04-15 05:16:05,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:05,189 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-04-15 05:16:05,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:05,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286362690] [2021-04-15 05:16:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286362690] [2021-04-15 05:16:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613891917] [2021-04-15 05:16:05,228 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 [2021-04-15 05:16:05,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:16:05,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:05,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:05,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:05,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:05,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:16:05,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176421213] [2021-04-15 05:16:05,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:16:05,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:16:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:16:05,320 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:05,557 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-04-15 05:16:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:16:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:05,560 INFO L225 Difference]: With dead ends: 824 [2021-04-15 05:16:05,561 INFO L226 Difference]: Without dead ends: 812 [2021-04-15 05:16:05,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:16:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-04-15 05:16:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-04-15 05:16:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-04-15 05:16:05,572 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-04-15 05:16:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:05,572 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-04-15 05:16:05,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-04-15 05:16:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:05,574 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:05,574 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] [2021-04-15 05:16:05,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 05:16:05,789 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-04-15 05:16:05,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:05,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663970697] [2021-04-15 05:16:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:05,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663970697] [2021-04-15 05:16:05,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948355065] [2021-04-15 05:16:05,838 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) [2021-04-15 05:16:05,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:16:05,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:05,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:05,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:05,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:05,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:16:05,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916007060] [2021-04-15 05:16:05,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:16:05,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:16:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:16:05,958 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:06,247 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-04-15 05:16:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 05:16:06,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:06,252 INFO L225 Difference]: With dead ends: 999 [2021-04-15 05:16:06,252 INFO L226 Difference]: Without dead ends: 995 [2021-04-15 05:16:06,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:16:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-04-15 05:16:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-04-15 05:16:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-04-15 05:16:06,266 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-04-15 05:16:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:06,267 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-04-15 05:16:06,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:06,267 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-04-15 05:16:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 05:16:06,268 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:06,268 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] [2021-04-15 05:16:06,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 05:16:06,489 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:06,490 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-04-15 05:16:06,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:06,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402300934] [2021-04-15 05:16:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:06,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402300934] [2021-04-15 05:16:06,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191350319] [2021-04-15 05:16:06,541 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 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 [2021-04-15 05:16:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 05:16:06,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:06,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:06,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 05:16:06,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428082205] [2021-04-15 05:16:06,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 05:16:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 05:16:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-04-15 05:16:06,627 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:06,978 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-04-15 05:16:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:16:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 05:16:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:06,983 INFO L225 Difference]: With dead ends: 1053 [2021-04-15 05:16:06,983 INFO L226 Difference]: Without dead ends: 1053 [2021-04-15 05:16:06,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 05:16:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-04-15 05:16:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-04-15 05:16:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-04-15 05:16:06,996 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-04-15 05:16:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:06,997 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-04-15 05:16:06,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-04-15 05:16:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:06,998 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:06,998 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] [2021-04-15 05:16:07,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 05:16:07,225 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:07,225 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-04-15 05:16:07,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:07,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824225797] [2021-04-15 05:16:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824225797] [2021-04-15 05:16:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873444714] [2021-04-15 05:16:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 05:16:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:07,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 05:16:07,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:07,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:07,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:07,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:07,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:07,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-04-15 05:16:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:07,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:07,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:07,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:07,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:07,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-04-15 05:16:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:07,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:07,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 05:16:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032814077] [2021-04-15 05:16:07,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:16:07,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:16:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:16:07,968 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:08,665 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-04-15 05:16:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 05:16:08,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:08,669 INFO L225 Difference]: With dead ends: 853 [2021-04-15 05:16:08,669 INFO L226 Difference]: Without dead ends: 766 [2021-04-15 05:16:08,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 05:16:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-04-15 05:16:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-04-15 05:16:08,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-04-15 05:16:08,680 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-04-15 05:16:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:08,680 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-04-15 05:16:08,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:08,680 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-04-15 05:16:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:08,682 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:08,682 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] [2021-04-15 05:16:08,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:08,897 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:08,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:08,897 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-04-15 05:16:08,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:08,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138657192] [2021-04-15 05:16:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:09,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138657192] [2021-04-15 05:16:09,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477014833] [2021-04-15 05:16:09,234 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 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 [2021-04-15 05:16:09,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:09,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:16:09,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:09,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:09,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:09,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:09,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:09,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-04-15 05:16:09,429 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:09,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:09,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:09,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:09,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:09,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-04-15 05:16:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:16:09,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:09,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-04-15 05:16:09,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497128151] [2021-04-15 05:16:09,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:09,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:09,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:09,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:09,571 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:11,199 INFO L93 Difference]: Finished difference Result 1157 states and 3418 transitions. [2021-04-15 05:16:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 05:16:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:11,203 INFO L225 Difference]: With dead ends: 1157 [2021-04-15 05:16:11,203 INFO L226 Difference]: Without dead ends: 1025 [2021-04-15 05:16:11,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1482.6ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:16:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-04-15 05:16:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 537. [2021-04-15 05:16:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-04-15 05:16:11,219 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-04-15 05:16:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:11,219 INFO L480 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-04-15 05:16:11,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-04-15 05:16:11,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:11,220 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:11,220 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] [2021-04-15 05:16:11,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 05:16:11,425 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:11,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-04-15 05:16:11,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:11,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950252798] [2021-04-15 05:16:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:11,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950252798] [2021-04-15 05:16:11,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213008162] [2021-04-15 05:16:11,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:11,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:11,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:11,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:16:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:11,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:11,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:11,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:11,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:11,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-04-15 05:16:12,033 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:12,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:12,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:12,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:12,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:12,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-04-15 05:16:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:16:12,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:12,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-04-15 05:16:12,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736562347] [2021-04-15 05:16:12,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:16:12,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:12,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:16:12,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:16:12,152 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:13,361 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-04-15 05:16:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:16:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:13,365 INFO L225 Difference]: With dead ends: 1024 [2021-04-15 05:16:13,365 INFO L226 Difference]: Without dead ends: 946 [2021-04-15 05:16:13,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1272.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:16:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-04-15 05:16:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-04-15 05:16:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:13,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-04-15 05:16:13,379 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-04-15 05:16:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:13,379 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-04-15 05:16:13,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-04-15 05:16:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:13,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:13,381 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, 1] [2021-04-15 05:16:13,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 05:16:13,597 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-04-15 05:16:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:13,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392051885] [2021-04-15 05:16:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392051885] [2021-04-15 05:16:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104502858] [2021-04-15 05:16:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:13,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:16:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:16:13,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:14,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:14,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:14,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:14,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:14,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-04-15 05:16:14,074 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:14,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:14,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:14,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:14,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:14,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-04-15 05:16:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:16:14,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:14,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-04-15 05:16:14,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263724361] [2021-04-15 05:16:14,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:14,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:14,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:14,305 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:16,678 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-04-15 05:16:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:16:16,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:16,682 INFO L225 Difference]: With dead ends: 1838 [2021-04-15 05:16:16,682 INFO L226 Difference]: Without dead ends: 1655 [2021-04-15 05:16:16,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1998.2ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 05:16:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-04-15 05:16:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-04-15 05:16:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-04-15 05:16:16,708 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-04-15 05:16:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:16,708 INFO L480 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-04-15 05:16:16,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-04-15 05:16:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:16,709 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:16,710 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] [2021-04-15 05:16:16,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:16,921 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:16,921 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-04-15 05:16:16,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:16,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882968197] [2021-04-15 05:16:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882968197] [2021-04-15 05:16:17,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32428775] [2021-04-15 05:16:17,279 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 [2021-04-15 05:16:17,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 05:16:17,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:16:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:17,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:17,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:17,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:17,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-04-15 05:16:17,491 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:17,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:17,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:17,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:17,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-04-15 05:16:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:16:17,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:17,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-04-15 05:16:17,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250527116] [2021-04-15 05:16:17,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:16:17,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:17,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:16:17,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:16:17,616 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:18,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:18,986 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-04-15 05:16:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:16:18,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:18,990 INFO L225 Difference]: With dead ends: 1136 [2021-04-15 05:16:18,990 INFO L226 Difference]: Without dead ends: 1058 [2021-04-15 05:16:18,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1296.3ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:16:18,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-04-15 05:16:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-04-15 05:16:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-04-15 05:16:19,005 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-04-15 05:16:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:19,005 INFO L480 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-04-15 05:16:19,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-04-15 05:16:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:19,006 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:19,007 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] [2021-04-15 05:16:19,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:19,221 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:19,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:19,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-04-15 05:16:19,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:19,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54308424] [2021-04-15 05:16:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54308424] [2021-04-15 05:16:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400399635] [2021-04-15 05:16:19,539 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:19,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:19,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 05:16:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:19,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-04-15 05:16:19,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:19,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:19,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:16:19,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-04-15 05:16:19,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:19,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-04-15 05:16:19,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:19,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:19,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:19,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-04-15 05:16:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:19,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:19,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-04-15 05:16:19,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422428765] [2021-04-15 05:16:19,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:16:19,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:19,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:16:19,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:16:19,905 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:21,997 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-04-15 05:16:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:16:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:22,000 INFO L225 Difference]: With dead ends: 1629 [2021-04-15 05:16:22,000 INFO L226 Difference]: Without dead ends: 1293 [2021-04-15 05:16:22,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1950.9ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 05:16:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-04-15 05:16:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-04-15 05:16:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-04-15 05:16:22,020 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-04-15 05:16:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:22,020 INFO L480 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-04-15 05:16:22,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-04-15 05:16:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:22,022 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:22,023 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] [2021-04-15 05:16:22,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:22,237 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-04-15 05:16:22,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:22,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272166750] [2021-04-15 05:16:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:22,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272166750] [2021-04-15 05:16:22,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019744208] [2021-04-15 05:16:22,644 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 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 [2021-04-15 05:16:22,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:22,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:22,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:16:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:22,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:22,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:22,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:22,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:22,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-04-15 05:16:22,875 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:22,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:22,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:22,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:22,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:22,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-04-15 05:16:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:16:23,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:23,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-04-15 05:16:23,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416881404] [2021-04-15 05:16:23,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:23,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:23,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:23,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:23,047 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-04-15 05:16:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:24,817 INFO L93 Difference]: Finished difference Result 1891 states and 5788 transitions. [2021-04-15 05:16:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:16:24,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 28 [2021-04-15 05:16:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:24,821 INFO L225 Difference]: With dead ends: 1891 [2021-04-15 05:16:24,821 INFO L226 Difference]: Without dead ends: 1768 [2021-04-15 05:16:24,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1735.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 05:16:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-04-15 05:16:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1049. [2021-04-15 05:16:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-04-15 05:16:24,851 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-04-15 05:16:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:24,852 INFO L480 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-04-15 05:16:24,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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) [2021-04-15 05:16:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-04-15 05:16:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:24,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:24,854 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] [2021-04-15 05:16:25,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 05:16:25,073 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-04-15 05:16:25,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:25,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983875694] [2021-04-15 05:16:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:25,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983875694] [2021-04-15 05:16:25,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509158345] [2021-04-15 05:16:25,327 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 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 [2021-04-15 05:16:25,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 05:16:25,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 05:16:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:25,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:25,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:25,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:25,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:25,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-04-15 05:16:25,558 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:25,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:25,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:25,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:25,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:25,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-04-15 05:16:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:25,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:25,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 05:16:25,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477458928] [2021-04-15 05:16:25,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:16:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:16:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:16:25,804 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:27,715 INFO L93 Difference]: Finished difference Result 2029 states and 6160 transitions. [2021-04-15 05:16:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 05:16:27,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:27,718 INFO L225 Difference]: With dead ends: 2029 [2021-04-15 05:16:27,718 INFO L226 Difference]: Without dead ends: 1767 [2021-04-15 05:16:27,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1658.5ms TimeCoverageRelationStatistics Valid=436, Invalid=2216, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:16:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-04-15 05:16:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1070. [2021-04-15 05:16:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-04-15 05:16:27,742 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-04-15 05:16:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:27,743 INFO L480 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-04-15 05:16:27,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-04-15 05:16:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:27,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:27,745 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] [2021-04-15 05:16:27,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 05:16:27,961 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:27,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:27,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-04-15 05:16:27,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:27,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698150564] [2021-04-15 05:16:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:28,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698150564] [2021-04-15 05:16:28,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514319270] [2021-04-15 05:16:28,300 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 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 [2021-04-15 05:16:28,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:16:28,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 05:16:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:28,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:28,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:28,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:28,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:28,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-04-15 05:16:28,445 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:28,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:28,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:28,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:28,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:28,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:32 [2021-04-15 05:16:28,515 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:28,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:28,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:28,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:28,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:28,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-04-15 05:16:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:16:28,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:28,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-04-15 05:16:28,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052252954] [2021-04-15 05:16:28,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:16:28,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:28,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:16:28,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:16:28,688 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:30,306 INFO L93 Difference]: Finished difference Result 2234 states and 6886 transitions. [2021-04-15 05:16:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 05:16:30,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:30,312 INFO L225 Difference]: With dead ends: 2234 [2021-04-15 05:16:30,312 INFO L226 Difference]: Without dead ends: 2061 [2021-04-15 05:16:30,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1470.6ms TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 05:16:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-04-15 05:16:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1141. [2021-04-15 05:16:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.219298245614035) internal successors, (3670), 1140 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3670 transitions. [2021-04-15 05:16:30,339 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3670 transitions. Word has length 28 [2021-04-15 05:16:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:30,339 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3670 transitions. [2021-04-15 05:16:30,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3670 transitions. [2021-04-15 05:16:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:30,342 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:30,342 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] [2021-04-15 05:16:30,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:30,562 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-04-15 05:16:30,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:30,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387143153] [2021-04-15 05:16:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:30,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387143153] [2021-04-15 05:16:30,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125746430] [2021-04-15 05:16:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:16:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 05:16:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:31,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:31,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:31,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:31,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:31,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-04-15 05:16:31,140 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:31,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:31,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:31,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:31,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:31,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-04-15 05:16:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:16:31,241 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-04-15 05:16:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:16:31,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:31,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:31,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:31,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-04-15 05:16:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:31,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:31,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 05:16:31,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820841298] [2021-04-15 05:16:31,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:16:31,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:31,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:16:31,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:16:31,524 INFO L87 Difference]: Start difference. First operand 1141 states and 3670 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:32,539 INFO L93 Difference]: Finished difference Result 2251 states and 7100 transitions. [2021-04-15 05:16:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 05:16:32,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 05:16:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:32,543 INFO L225 Difference]: With dead ends: 2251 [2021-04-15 05:16:32,543 INFO L226 Difference]: Without dead ends: 1891 [2021-04-15 05:16:32,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1101.0ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 05:16:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-04-15 05:16:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1165. [2021-04-15 05:16:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 3.2371134020618557) internal successors, (3768), 1164 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3768 transitions. [2021-04-15 05:16:32,575 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3768 transitions. Word has length 28 [2021-04-15 05:16:32,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:32,575 INFO L480 AbstractCegarLoop]: Abstraction has 1165 states and 3768 transitions. [2021-04-15 05:16:32,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:32,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3768 transitions. [2021-04-15 05:16:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 05:16:32,577 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:32,577 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] [2021-04-15 05:16:32,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 05:16:32,793 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:32,793 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-04-15 05:16:32,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:32,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089824837] [2021-04-15 05:16:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:33,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:33,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089824837] [2021-04-15 05:16:33,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144816568] [2021-04-15 05:16:33,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:16:33,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:33,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:16:33,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:33,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:16:33,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:33,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:33,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:33,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-04-15 05:16:33,457 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:16:33,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:16:33,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:16:33,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:16:33,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:16:33,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-04-15 05:16:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:33,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:33,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-04-15 05:16:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358832667] [2021-04-15 05:16:33,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:16:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:16:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:16:33,639 INFO L87 Difference]: Start difference. First operand 1165 states and 3768 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-04-15 05:16:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:34,391 INFO L93 Difference]: Finished difference Result 2014 states and 6436 transitions. [2021-04-15 05:16:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 05:16:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 28 [2021-04-15 05:16:34,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:34,396 INFO L225 Difference]: With dead ends: 2014 [2021-04-15 05:16:34,396 INFO L226 Difference]: Without dead ends: 1692 [2021-04-15 05:16:34,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1000.8ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-04-15 05:16:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-04-15 05:16:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1114. [2021-04-15 05:16:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 3.225516621743037) internal successors, (3590), 1113 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3590 transitions. [2021-04-15 05:16:34,418 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3590 transitions. Word has length 28 [2021-04-15 05:16:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:34,418 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 3590 transitions. [2021-04-15 05:16:34,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-04-15 05:16:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3590 transitions. [2021-04-15 05:16:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:34,420 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:34,420 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:34,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:34,638 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:34,638 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 9 times [2021-04-15 05:16:34,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:34,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556591396] [2021-04-15 05:16:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556591396] [2021-04-15 05:16:34,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301385620] [2021-04-15 05:16:34,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:34,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:16:34,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:34,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:16:34,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:34,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 05:16:34,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725161539] [2021-04-15 05:16:34,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:16:34,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:34,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:16:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:16:34,865 INFO L87 Difference]: Start difference. First operand 1114 states and 3590 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2021-04-15 05:16:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:36,184 INFO L93 Difference]: Finished difference Result 5462 states and 16045 transitions. [2021-04-15 05:16:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-04-15 05:16:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:36,193 INFO L225 Difference]: With dead ends: 5462 [2021-04-15 05:16:36,193 INFO L226 Difference]: Without dead ends: 5462 [2021-04-15 05:16:36,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 921.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-04-15 05:16:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-04-15 05:16:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 1274. [2021-04-15 05:16:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 3.344854673998429) internal successors, (4258), 1273 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 4258 transitions. [2021-04-15 05:16:36,257 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 4258 transitions. Word has length 30 [2021-04-15 05:16:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:36,258 INFO L480 AbstractCegarLoop]: Abstraction has 1274 states and 4258 transitions. [2021-04-15 05:16:36,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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) [2021-04-15 05:16:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 4258 transitions. [2021-04-15 05:16:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:36,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:36,260 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:36,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 05:16:36,481 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 10 times [2021-04-15 05:16:36,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:36,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792297504] [2021-04-15 05:16:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:36,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792297504] [2021-04-15 05:16:36,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376952428] [2021-04-15 05:16:36,524 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:36,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:36,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:36,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:16:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:36,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:16:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058507429] [2021-04-15 05:16:36,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:36,665 INFO L87 Difference]: Start difference. First operand 1274 states and 4258 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:37,483 INFO L93 Difference]: Finished difference Result 4112 states and 12021 transitions. [2021-04-15 05:16:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:16:37,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-04-15 05:16:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:37,493 INFO L225 Difference]: With dead ends: 4112 [2021-04-15 05:16:37,493 INFO L226 Difference]: Without dead ends: 4088 [2021-04-15 05:16:37,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:16:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-04-15 05:16:37,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 1288. [2021-04-15 05:16:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3387723387723387) internal successors, (4297), 1287 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4297 transitions. [2021-04-15 05:16:37,550 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4297 transitions. Word has length 30 [2021-04-15 05:16:37,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:37,550 INFO L480 AbstractCegarLoop]: Abstraction has 1288 states and 4297 transitions. [2021-04-15 05:16:37,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:37,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4297 transitions. [2021-04-15 05:16:37,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:37,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:37,553 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:37,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 05:16:37,775 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 11 times [2021-04-15 05:16:37,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:37,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619966948] [2021-04-15 05:16:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:37,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619966948] [2021-04-15 05:16:37,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894185374] [2021-04-15 05:16:37,819 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 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 [2021-04-15 05:16:37,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:16:37,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:37,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:16:37,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:37,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 05:16:37,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96152129] [2021-04-15 05:16:37,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:37,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:37,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:37,942 INFO L87 Difference]: Start difference. First operand 1288 states and 4297 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:38,734 INFO L93 Difference]: Finished difference Result 4322 states and 12488 transitions. [2021-04-15 05:16:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-04-15 05:16:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-04-15 05:16:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:38,742 INFO L225 Difference]: With dead ends: 4322 [2021-04-15 05:16:38,742 INFO L226 Difference]: Without dead ends: 4322 [2021-04-15 05:16:38,743 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:16:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-04-15 05:16:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 1090. [2021-04-15 05:16:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.1799816345270893) internal successors, (3463), 1089 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3463 transitions. [2021-04-15 05:16:38,791 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3463 transitions. Word has length 30 [2021-04-15 05:16:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:38,791 INFO L480 AbstractCegarLoop]: Abstraction has 1090 states and 3463 transitions. [2021-04-15 05:16:38,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3463 transitions. [2021-04-15 05:16:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:38,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:38,793 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:39,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 05:16:39,009 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 12 times [2021-04-15 05:16:39,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:39,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299640697] [2021-04-15 05:16:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299640697] [2021-04-15 05:16:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644726098] [2021-04-15 05:16:39,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:39,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:16:39,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:16:39,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:39,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:16:39,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177150598] [2021-04-15 05:16:39,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:16:39,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:16:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:16:39,156 INFO L87 Difference]: Start difference. First operand 1090 states and 3463 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-04-15 05:16:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:39,859 INFO L93 Difference]: Finished difference Result 3937 states and 11665 transitions. [2021-04-15 05:16:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:16:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-04-15 05:16:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:39,864 INFO L225 Difference]: With dead ends: 3937 [2021-04-15 05:16:39,864 INFO L226 Difference]: Without dead ends: 3861 [2021-04-15 05:16:39,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:16:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-04-15 05:16:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 1226. [2021-04-15 05:16:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 3.244081632653061) internal successors, (3974), 1225 states have internal predecessors, (3974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3974 transitions. [2021-04-15 05:16:39,929 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3974 transitions. Word has length 30 [2021-04-15 05:16:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:39,930 INFO L480 AbstractCegarLoop]: Abstraction has 1226 states and 3974 transitions. [2021-04-15 05:16:39,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-04-15 05:16:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3974 transitions. [2021-04-15 05:16:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:39,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:39,932 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:40,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:40,132 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 13 times [2021-04-15 05:16:40,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:40,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73349969] [2021-04-15 05:16:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73349969] [2021-04-15 05:16:40,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039290006] [2021-04-15 05:16:40,188 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:16:40,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:40,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:16:40,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082358568] [2021-04-15 05:16:40,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:16:40,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:16:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:16:40,313 INFO L87 Difference]: Start difference. First operand 1226 states and 3974 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-04-15 05:16:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:41,044 INFO L93 Difference]: Finished difference Result 3748 states and 11353 transitions. [2021-04-15 05:16:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:16:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-04-15 05:16:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:41,049 INFO L225 Difference]: With dead ends: 3748 [2021-04-15 05:16:41,049 INFO L226 Difference]: Without dead ends: 3728 [2021-04-15 05:16:41,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 05:16:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-04-15 05:16:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 1495. [2021-04-15 05:16:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.2402945113788486) internal successors, (4841), 1494 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 4841 transitions. [2021-04-15 05:16:41,083 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 4841 transitions. Word has length 30 [2021-04-15 05:16:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:41,083 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 4841 transitions. [2021-04-15 05:16:41,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-04-15 05:16:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 4841 transitions. [2021-04-15 05:16:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:41,086 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:41,086 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:41,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 05:16:41,306 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 14 times [2021-04-15 05:16:41,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:41,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343925851] [2021-04-15 05:16:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:41,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343925851] [2021-04-15 05:16:41,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607964592] [2021-04-15 05:16:41,371 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 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 [2021-04-15 05:16:41,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:41,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:41,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:16:41,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:41,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 05:16:41,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600406013] [2021-04-15 05:16:41,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 05:16:41,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:41,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 05:16:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 05:16:41,494 INFO L87 Difference]: Start difference. First operand 1495 states and 4841 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-04-15 05:16:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:42,335 INFO L93 Difference]: Finished difference Result 4011 states and 11996 transitions. [2021-04-15 05:16:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:16:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-04-15 05:16:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:42,341 INFO L225 Difference]: With dead ends: 4011 [2021-04-15 05:16:42,341 INFO L226 Difference]: Without dead ends: 4011 [2021-04-15 05:16:42,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 598.6ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 05:16:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2021-04-15 05:16:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 1317. [2021-04-15 05:16:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 3.3054711246200608) internal successors, (4350), 1316 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4350 transitions. [2021-04-15 05:16:42,390 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4350 transitions. Word has length 30 [2021-04-15 05:16:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:42,390 INFO L480 AbstractCegarLoop]: Abstraction has 1317 states and 4350 transitions. [2021-04-15 05:16:42,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2021-04-15 05:16:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4350 transitions. [2021-04-15 05:16:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:42,392 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:42,392 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:42,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:42,612 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:42,613 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 15 times [2021-04-15 05:16:42,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:42,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960274661] [2021-04-15 05:16:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960274661] [2021-04-15 05:16:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300847681] [2021-04-15 05:16:42,659 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 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 [2021-04-15 05:16:42,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:16:42,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:42,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:42,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:42,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:42,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 05:16:42,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516851772] [2021-04-15 05:16:42,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:16:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:16:42,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:16:42,814 INFO L87 Difference]: Start difference. First operand 1317 states and 4350 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-04-15 05:16:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:43,874 INFO L93 Difference]: Finished difference Result 5592 states and 17120 transitions. [2021-04-15 05:16:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:16:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:43,895 INFO L225 Difference]: With dead ends: 5592 [2021-04-15 05:16:43,895 INFO L226 Difference]: Without dead ends: 5592 [2021-04-15 05:16:43,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 05:16:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5592 states. [2021-04-15 05:16:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5592 to 1593. [2021-04-15 05:16:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4233668341708543) internal successors, (5450), 1592 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5450 transitions. [2021-04-15 05:16:43,942 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5450 transitions. Word has length 30 [2021-04-15 05:16:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:43,942 INFO L480 AbstractCegarLoop]: Abstraction has 1593 states and 5450 transitions. [2021-04-15 05:16:43,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-04-15 05:16:43,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5450 transitions. [2021-04-15 05:16:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:43,945 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:43,945 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:44,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 05:16:44,166 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 16 times [2021-04-15 05:16:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:44,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121095384] [2021-04-15 05:16:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121095384] [2021-04-15 05:16:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065674083] [2021-04-15 05:16:44,209 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 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 [2021-04-15 05:16:44,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:44,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:44,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:44,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:16:44,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902108909] [2021-04-15 05:16:44,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:16:44,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:16:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:16:44,364 INFO L87 Difference]: Start difference. First operand 1593 states and 5450 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:45,227 INFO L93 Difference]: Finished difference Result 5179 states and 15726 transitions. [2021-04-15 05:16:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:16:45,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:45,235 INFO L225 Difference]: With dead ends: 5179 [2021-04-15 05:16:45,235 INFO L226 Difference]: Without dead ends: 5159 [2021-04-15 05:16:45,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 05:16:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5159 states. [2021-04-15 05:16:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5159 to 1603. [2021-04-15 05:16:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.4213483146067416) internal successors, (5481), 1602 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5481 transitions. [2021-04-15 05:16:45,290 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5481 transitions. Word has length 30 [2021-04-15 05:16:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:45,290 INFO L480 AbstractCegarLoop]: Abstraction has 1603 states and 5481 transitions. [2021-04-15 05:16:45,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5481 transitions. [2021-04-15 05:16:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:45,294 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:45,294 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:45,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 05:16:45,514 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 17 times [2021-04-15 05:16:45,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:45,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638385450] [2021-04-15 05:16:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:45,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638385450] [2021-04-15 05:16:45,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019691650] [2021-04-15 05:16:45,557 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:45,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:16:45,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:45,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:45,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-04-15 05:16:45,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9787324] [2021-04-15 05:16:45,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:16:45,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:45,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:16:45,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:16:45,712 INFO L87 Difference]: Start difference. First operand 1603 states and 5481 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:46,654 INFO L93 Difference]: Finished difference Result 5490 states and 16477 transitions. [2021-04-15 05:16:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:16:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:46,662 INFO L225 Difference]: With dead ends: 5490 [2021-04-15 05:16:46,662 INFO L226 Difference]: Without dead ends: 5490 [2021-04-15 05:16:46,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 05:16:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2021-04-15 05:16:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 1592. [2021-04-15 05:16:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 3.4223758642363293) internal successors, (5445), 1591 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5445 transitions. [2021-04-15 05:16:46,717 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5445 transitions. Word has length 30 [2021-04-15 05:16:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:46,717 INFO L480 AbstractCegarLoop]: Abstraction has 1592 states and 5445 transitions. [2021-04-15 05:16:46,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5445 transitions. [2021-04-15 05:16:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:46,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:46,721 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:46,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 05:16:46,941 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:46,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:46,942 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 18 times [2021-04-15 05:16:46,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:46,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92351467] [2021-04-15 05:16:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:46,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92351467] [2021-04-15 05:16:46,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061708611] [2021-04-15 05:16:46,986 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:47,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 05:16:47,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:47,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:47,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 05:16:47,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060095542] [2021-04-15 05:16:47,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:47,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:47,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:47,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:47,119 INFO L87 Difference]: Start difference. First operand 1592 states and 5445 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:47,752 INFO L93 Difference]: Finished difference Result 4892 states and 15553 transitions. [2021-04-15 05:16:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:16:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-04-15 05:16:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:47,759 INFO L225 Difference]: With dead ends: 4892 [2021-04-15 05:16:47,760 INFO L226 Difference]: Without dead ends: 4844 [2021-04-15 05:16:47,760 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:16:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-04-15 05:16:47,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 1720. [2021-04-15 05:16:47,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.4543339150668992) internal successors, (5938), 1719 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5938 transitions. [2021-04-15 05:16:47,796 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5938 transitions. Word has length 30 [2021-04-15 05:16:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:47,797 INFO L480 AbstractCegarLoop]: Abstraction has 1720 states and 5938 transitions. [2021-04-15 05:16:47,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5938 transitions. [2021-04-15 05:16:47,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:47,799 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:47,799 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:48,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 05:16:48,000 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:48,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 19 times [2021-04-15 05:16:48,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:48,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658007631] [2021-04-15 05:16:48,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:48,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658007631] [2021-04-15 05:16:48,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419742587] [2021-04-15 05:16:48,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:48,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:48,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:48,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 05:16:48,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135490036] [2021-04-15 05:16:48,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:48,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:48,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:48,200 INFO L87 Difference]: Start difference. First operand 1720 states and 5938 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:49,133 INFO L93 Difference]: Finished difference Result 5688 states and 17607 transitions. [2021-04-15 05:16:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:16:49,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-04-15 05:16:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:49,141 INFO L225 Difference]: With dead ends: 5688 [2021-04-15 05:16:49,141 INFO L226 Difference]: Without dead ends: 5672 [2021-04-15 05:16:49,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:16:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-04-15 05:16:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 1975. [2021-04-15 05:16:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 3.498480243161094) internal successors, (6906), 1974 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 6906 transitions. [2021-04-15 05:16:49,184 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 6906 transitions. Word has length 30 [2021-04-15 05:16:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:49,184 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 6906 transitions. [2021-04-15 05:16:49,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:49,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 6906 transitions. [2021-04-15 05:16:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:49,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:49,187 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:49,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 05:16:49,389 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:49,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 20 times [2021-04-15 05:16:49,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:49,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727266978] [2021-04-15 05:16:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:49,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727266978] [2021-04-15 05:16:49,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44333818] [2021-04-15 05:16:49,436 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 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 [2021-04-15 05:16:49,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:16:49,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:49,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:49,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 05:16:49,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806339508] [2021-04-15 05:16:49,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:49,548 INFO L87 Difference]: Start difference. First operand 1975 states and 6906 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:50,521 INFO L93 Difference]: Finished difference Result 5943 states and 18242 transitions. [2021-04-15 05:16:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:16:50,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-04-15 05:16:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:50,530 INFO L225 Difference]: With dead ends: 5943 [2021-04-15 05:16:50,530 INFO L226 Difference]: Without dead ends: 5943 [2021-04-15 05:16:50,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 632.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 05:16:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2021-04-15 05:16:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 1883. [2021-04-15 05:16:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 3.524973432518597) internal successors, (6634), 1882 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 6634 transitions. [2021-04-15 05:16:50,577 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 6634 transitions. Word has length 30 [2021-04-15 05:16:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:50,577 INFO L480 AbstractCegarLoop]: Abstraction has 1883 states and 6634 transitions. [2021-04-15 05:16:50,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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) [2021-04-15 05:16:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 6634 transitions. [2021-04-15 05:16:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:50,580 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:50,580 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:50,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 05:16:50,781 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 21 times [2021-04-15 05:16:50,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:50,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851228908] [2021-04-15 05:16:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:50,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851228908] [2021-04-15 05:16:50,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733150851] [2021-04-15 05:16:50,833 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 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 [2021-04-15 05:16:50,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:16:50,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:50,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:50,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:16:50,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872000645] [2021-04-15 05:16:50,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:50,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:50,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:50,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:50,954 INFO L87 Difference]: Start difference. First operand 1883 states and 6634 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:51,808 INFO L93 Difference]: Finished difference Result 5285 states and 16489 transitions. [2021-04-15 05:16:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 05:16:51,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:51,816 INFO L225 Difference]: With dead ends: 5285 [2021-04-15 05:16:51,816 INFO L226 Difference]: Without dead ends: 5197 [2021-04-15 05:16:51,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:16:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5197 states. [2021-04-15 05:16:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5197 to 1921. [2021-04-15 05:16:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.5078125) internal successors, (6735), 1920 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6735 transitions. [2021-04-15 05:16:51,857 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6735 transitions. Word has length 30 [2021-04-15 05:16:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:51,857 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 6735 transitions. [2021-04-15 05:16:51,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6735 transitions. [2021-04-15 05:16:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:51,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:51,860 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:52,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 05:16:52,065 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:52,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 22 times [2021-04-15 05:16:52,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:52,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828757640] [2021-04-15 05:16:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:52,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828757640] [2021-04-15 05:16:52,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682787359] [2021-04-15 05:16:52,151 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 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 [2021-04-15 05:16:52,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:16:52,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:52,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:52,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:52,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:52,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:16:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859399367] [2021-04-15 05:16:52,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:52,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:52,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:52,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:52,274 INFO L87 Difference]: Start difference. First operand 1921 states and 6735 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:53,260 INFO L93 Difference]: Finished difference Result 5368 states and 16837 transitions. [2021-04-15 05:16:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:16:53,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:53,269 INFO L225 Difference]: With dead ends: 5368 [2021-04-15 05:16:53,269 INFO L226 Difference]: Without dead ends: 5320 [2021-04-15 05:16:53,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 05:16:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2021-04-15 05:16:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 2167. [2021-04-15 05:16:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.4247460757156047) internal successors, (7418), 2166 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7418 transitions. [2021-04-15 05:16:53,334 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7418 transitions. Word has length 30 [2021-04-15 05:16:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:53,334 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 7418 transitions. [2021-04-15 05:16:53,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7418 transitions. [2021-04-15 05:16:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:53,338 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:53,339 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:53,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 05:16:53,549 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 23 times [2021-04-15 05:16:53,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:53,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864579303] [2021-04-15 05:16:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:53,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864579303] [2021-04-15 05:16:53,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506970709] [2021-04-15 05:16:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:53,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:16:53,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:16:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:53,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:53,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:16:53,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183572539] [2021-04-15 05:16:53,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:53,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:53,708 INFO L87 Difference]: Start difference. First operand 2167 states and 7418 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:54,831 INFO L93 Difference]: Finished difference Result 6070 states and 18667 transitions. [2021-04-15 05:16:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-04-15 05:16:54,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:54,840 INFO L225 Difference]: With dead ends: 6070 [2021-04-15 05:16:54,840 INFO L226 Difference]: Without dead ends: 6058 [2021-04-15 05:16:54,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 747.6ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 05:16:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6058 states. [2021-04-15 05:16:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6058 to 2443. [2021-04-15 05:16:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 3.3562653562653564) internal successors, (8196), 2442 states have internal predecessors, (8196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 8196 transitions. [2021-04-15 05:16:54,916 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 8196 transitions. Word has length 30 [2021-04-15 05:16:54,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:54,916 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 8196 transitions. [2021-04-15 05:16:54,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 8196 transitions. [2021-04-15 05:16:54,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 05:16:54,920 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:54,920 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:55,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:55,124 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:55,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 24 times [2021-04-15 05:16:55,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:55,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682943433] [2021-04-15 05:16:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:55,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682943433] [2021-04-15 05:16:55,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757791586] [2021-04-15 05:16:55,173 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:55,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 05:16:55,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:16:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:55,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:55,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 05:16:55,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346651153] [2021-04-15 05:16:55,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 05:16:55,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:55,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 05:16:55,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-04-15 05:16:55,315 INFO L87 Difference]: Start difference. First operand 2443 states and 8196 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:56,641 INFO L93 Difference]: Finished difference Result 6469 states and 19686 transitions. [2021-04-15 05:16:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-04-15 05:16:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 05:16:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:56,651 INFO L225 Difference]: With dead ends: 6469 [2021-04-15 05:16:56,651 INFO L226 Difference]: Without dead ends: 6469 [2021-04-15 05:16:56,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 918.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-04-15 05:16:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-04-15 05:16:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 2281. [2021-04-15 05:16:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2280 states have (on average 3.395175438596491) internal successors, (7741), 2280 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 7741 transitions. [2021-04-15 05:16:56,704 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 7741 transitions. Word has length 30 [2021-04-15 05:16:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:56,704 INFO L480 AbstractCegarLoop]: Abstraction has 2281 states and 7741 transitions. [2021-04-15 05:16:56,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 7741 transitions. [2021-04-15 05:16:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:16:56,708 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:56,708 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:56,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:56,908 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 25 times [2021-04-15 05:16:56,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:56,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510560049] [2021-04-15 05:16:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:56,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510560049] [2021-04-15 05:16:56,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813905628] [2021-04-15 05:16:56,973 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:16:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:57,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:57,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:16:57,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682579927] [2021-04-15 05:16:57,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:16:57,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:57,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:16:57,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:16:57,195 INFO L87 Difference]: Start difference. First operand 2281 states and 7741 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2021-04-15 05:16:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:16:58,335 INFO L93 Difference]: Finished difference Result 9682 states and 31073 transitions. [2021-04-15 05:16:58,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 05:16:58,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 32 [2021-04-15 05:16:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:16:58,351 INFO L225 Difference]: With dead ends: 9682 [2021-04-15 05:16:58,351 INFO L226 Difference]: Without dead ends: 9682 [2021-04-15 05:16:58,352 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 680.5ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:16:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9682 states. [2021-04-15 05:16:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9682 to 2995. [2021-04-15 05:16:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.5848363393453573) internal successors, (10733), 2994 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:16:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10733 transitions. [2021-04-15 05:16:58,439 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10733 transitions. Word has length 32 [2021-04-15 05:16:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:16:58,439 INFO L480 AbstractCegarLoop]: Abstraction has 2995 states and 10733 transitions. [2021-04-15 05:16:58,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2021-04-15 05:16:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10733 transitions. [2021-04-15 05:16:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:16:58,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:16:58,445 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:16:58,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 05:16:58,663 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:16:58,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:16:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-04-15 05:16:58,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:16:58,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601843422] [2021-04-15 05:16:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:16:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:16:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:58,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601843422] [2021-04-15 05:16:58,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726027022] [2021-04-15 05:16:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:16:58,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:16:58,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:16:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:16:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:16:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:16:58,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:16:58,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 05:16:58,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174046333] [2021-04-15 05:16:58,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:16:58,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:16:58,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:16:58,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:16:58,956 INFO L87 Difference]: Start difference. First operand 2995 states and 10733 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2021-04-15 05:17:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:00,306 INFO L93 Difference]: Finished difference Result 8824 states and 28026 transitions. [2021-04-15 05:17:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 05:17:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 32 [2021-04-15 05:17:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:00,319 INFO L225 Difference]: With dead ends: 8824 [2021-04-15 05:17:00,319 INFO L226 Difference]: Without dead ends: 8824 [2021-04-15 05:17:00,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 770.6ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 05:17:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8824 states. [2021-04-15 05:17:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8824 to 2986. [2021-04-15 05:17:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.5728643216080402) internal successors, (10665), 2985 states have internal predecessors, (10665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 10665 transitions. [2021-04-15 05:17:00,396 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 10665 transitions. Word has length 32 [2021-04-15 05:17:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:00,396 INFO L480 AbstractCegarLoop]: Abstraction has 2986 states and 10665 transitions. [2021-04-15 05:17:00,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2021-04-15 05:17:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 10665 transitions. [2021-04-15 05:17:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:00,401 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:00,401 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:00,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:00,601 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:00,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:00,601 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 26 times [2021-04-15 05:17:00,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:00,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62548493] [2021-04-15 05:17:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:00,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62548493] [2021-04-15 05:17:00,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97017261] [2021-04-15 05:17:00,666 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 [2021-04-15 05:17:00,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:17:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:17:00,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:00,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 05:17:00,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940547428] [2021-04-15 05:17:00,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:00,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:00,822 INFO L87 Difference]: Start difference. First operand 2986 states and 10665 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:02,501 INFO L93 Difference]: Finished difference Result 8875 states and 28153 transitions. [2021-04-15 05:17:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-04-15 05:17:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:17:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:02,514 INFO L225 Difference]: With dead ends: 8875 [2021-04-15 05:17:02,514 INFO L226 Difference]: Without dead ends: 8867 [2021-04-15 05:17:02,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 981.3ms TimeCoverageRelationStatistics Valid=1463, Invalid=6193, Unknown=0, NotChecked=0, Total=7656 [2021-04-15 05:17:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2021-04-15 05:17:02,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 3090. [2021-04-15 05:17:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.5995467788928455) internal successors, (11119), 3089 states have internal predecessors, (11119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 11119 transitions. [2021-04-15 05:17:02,588 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 11119 transitions. Word has length 32 [2021-04-15 05:17:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:02,588 INFO L480 AbstractCegarLoop]: Abstraction has 3090 states and 11119 transitions. [2021-04-15 05:17:02,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 11119 transitions. [2021-04-15 05:17:02,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:02,592 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:02,592 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:02,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:02,793 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:02,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:02,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-04-15 05:17:02,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:02,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605287899] [2021-04-15 05:17:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:02,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605287899] [2021-04-15 05:17:02,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987720737] [2021-04-15 05:17:02,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:02,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:17:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:02,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:17:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:17:03,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:03,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-04-15 05:17:03,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118604006] [2021-04-15 05:17:03,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:03,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:03,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:03,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:03,035 INFO L87 Difference]: Start difference. First operand 3090 states and 11119 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-04-15 05:17:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:04,972 INFO L93 Difference]: Finished difference Result 8679 states and 27970 transitions. [2021-04-15 05:17:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-04-15 05:17:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 32 [2021-04-15 05:17:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:04,985 INFO L225 Difference]: With dead ends: 8679 [2021-04-15 05:17:04,985 INFO L226 Difference]: Without dead ends: 8679 [2021-04-15 05:17:04,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1243.4ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-04-15 05:17:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-04-15 05:17:05,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 3210. [2021-04-15 05:17:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.630414459333126) internal successors, (11650), 3209 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 11650 transitions. [2021-04-15 05:17:05,066 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 11650 transitions. Word has length 32 [2021-04-15 05:17:05,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:05,066 INFO L480 AbstractCegarLoop]: Abstraction has 3210 states and 11650 transitions. [2021-04-15 05:17:05,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-04-15 05:17:05,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 11650 transitions. [2021-04-15 05:17:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:05,072 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:05,072 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:05,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 05:17:05,282 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:05,282 INFO L82 PathProgramCache]: Analyzing trace with hash -433008152, now seen corresponding path program 27 times [2021-04-15 05:17:05,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:05,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739213349] [2021-04-15 05:17:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:05,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739213349] [2021-04-15 05:17:05,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81291226] [2021-04-15 05:17:05,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:05,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:17:05,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:05,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:05,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:05,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:05,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:17:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216093604] [2021-04-15 05:17:05,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:17:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:17:05,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:17:05,493 INFO L87 Difference]: Start difference. First operand 3210 states and 11650 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-04-15 05:17:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:06,615 INFO L93 Difference]: Finished difference Result 9135 states and 29852 transitions. [2021-04-15 05:17:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 05:17:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 32 [2021-04-15 05:17:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:06,630 INFO L225 Difference]: With dead ends: 9135 [2021-04-15 05:17:06,630 INFO L226 Difference]: Without dead ends: 9083 [2021-04-15 05:17:06,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=1064, Invalid=3906, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 05:17:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-04-15 05:17:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 3428. [2021-04-15 05:17:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 3.6778523489932886) internal successors, (12604), 3427 states have internal predecessors, (12604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12604 transitions. [2021-04-15 05:17:06,728 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12604 transitions. Word has length 32 [2021-04-15 05:17:06,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:06,728 INFO L480 AbstractCegarLoop]: Abstraction has 3428 states and 12604 transitions. [2021-04-15 05:17:06,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-04-15 05:17:06,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12604 transitions. [2021-04-15 05:17:06,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:06,733 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:06,733 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:06,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 05:17:06,934 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:06,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1654503192, now seen corresponding path program 28 times [2021-04-15 05:17:06,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:06,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844210033] [2021-04-15 05:17:06,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:07,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844210033] [2021-04-15 05:17:07,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125812819] [2021-04-15 05:17:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:17:07,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:17:07,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:07,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:07,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:07,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-04-15 05:17:07,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222458748] [2021-04-15 05:17:07,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:17:07,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:07,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:17:07,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:17:07,206 INFO L87 Difference]: Start difference. First operand 3428 states and 12604 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-04-15 05:17:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:08,000 INFO L93 Difference]: Finished difference Result 9077 states and 29720 transitions. [2021-04-15 05:17:08,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:17:08,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 32 [2021-04-15 05:17:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:08,020 INFO L225 Difference]: With dead ends: 9077 [2021-04-15 05:17:08,020 INFO L226 Difference]: Without dead ends: 9077 [2021-04-15 05:17:08,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:17:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2021-04-15 05:17:08,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 3545. [2021-04-15 05:17:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3544 states have (on average 3.660270880361174) internal successors, (12972), 3544 states have internal predecessors, (12972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 12972 transitions. [2021-04-15 05:17:08,152 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 12972 transitions. Word has length 32 [2021-04-15 05:17:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:08,152 INFO L480 AbstractCegarLoop]: Abstraction has 3545 states and 12972 transitions. [2021-04-15 05:17:08,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-04-15 05:17:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 12972 transitions. [2021-04-15 05:17:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:08,162 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:08,162 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:08,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 05:17:08,384 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:08,385 INFO L82 PathProgramCache]: Analyzing trace with hash 952838794, now seen corresponding path program 19 times [2021-04-15 05:17:08,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:08,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245104066] [2021-04-15 05:17:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:17:08,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245104066] [2021-04-15 05:17:08,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104818184] [2021-04-15 05:17:08,427 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:17:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:17:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:17:08,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:08,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-04-15 05:17:08,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49869930] [2021-04-15 05:17:08,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:17:08,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:08,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:17:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:17:08,623 INFO L87 Difference]: Start difference. First operand 3545 states and 12972 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-04-15 05:17:09,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:09,999 INFO L93 Difference]: Finished difference Result 8376 states and 28279 transitions. [2021-04-15 05:17:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 05:17:10,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 32 [2021-04-15 05:17:10,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:10,013 INFO L225 Difference]: With dead ends: 8376 [2021-04-15 05:17:10,013 INFO L226 Difference]: Without dead ends: 8376 [2021-04-15 05:17:10,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 802.0ms TimeCoverageRelationStatistics Valid=870, Invalid=3822, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 05:17:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-04-15 05:17:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 3543. [2021-04-15 05:17:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 3.6620553359683794) internal successors, (12971), 3542 states have internal predecessors, (12971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 12971 transitions. [2021-04-15 05:17:10,103 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 12971 transitions. Word has length 32 [2021-04-15 05:17:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:10,104 INFO L480 AbstractCegarLoop]: Abstraction has 3543 states and 12971 transitions. [2021-04-15 05:17:10,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-04-15 05:17:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 12971 transitions. [2021-04-15 05:17:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:10,109 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:10,109 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:10,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:10,309 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1653605764, now seen corresponding path program 20 times [2021-04-15 05:17:10,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:10,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329176790] [2021-04-15 05:17:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:10,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329176790] [2021-04-15 05:17:10,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032004799] [2021-04-15 05:17:10,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:17:10,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:10,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:10,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:17:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:10,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:10,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 05:17:10,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276213510] [2021-04-15 05:17:10,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:17:10,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:17:10,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:17:10,551 INFO L87 Difference]: Start difference. First operand 3543 states and 12971 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:12,294 INFO L93 Difference]: Finished difference Result 9833 states and 31971 transitions. [2021-04-15 05:17:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-04-15 05:17:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:17:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:12,310 INFO L225 Difference]: With dead ends: 9833 [2021-04-15 05:17:12,310 INFO L226 Difference]: Without dead ends: 9833 [2021-04-15 05:17:12,311 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 1173.4ms TimeCoverageRelationStatistics Valid=2012, Invalid=7690, Unknown=0, NotChecked=0, Total=9702 [2021-04-15 05:17:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-04-15 05:17:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 3619. [2021-04-15 05:17:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 3.646489773355445) internal successors, (13193), 3618 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 13193 transitions. [2021-04-15 05:17:12,398 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 13193 transitions. Word has length 32 [2021-04-15 05:17:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:12,398 INFO L480 AbstractCegarLoop]: Abstraction has 3619 states and 13193 transitions. [2021-04-15 05:17:12,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:12,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 13193 transitions. [2021-04-15 05:17:12,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:12,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:12,403 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:12,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 05:17:12,603 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-04-15 05:17:12,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:12,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605746644] [2021-04-15 05:17:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:12,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605746644] [2021-04-15 05:17:12,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234600690] [2021-04-15 05:17:12,660 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 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 [2021-04-15 05:17:12,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:17:12,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:12,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:12,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:12,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:12,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-04-15 05:17:12,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177703799] [2021-04-15 05:17:12,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:12,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:12,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:12,852 INFO L87 Difference]: Start difference. First operand 3619 states and 13193 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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) [2021-04-15 05:17:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:14,315 INFO L93 Difference]: Finished difference Result 9122 states and 30000 transitions. [2021-04-15 05:17:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-04-15 05:17:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 32 [2021-04-15 05:17:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:14,331 INFO L225 Difference]: With dead ends: 9122 [2021-04-15 05:17:14,331 INFO L226 Difference]: Without dead ends: 9078 [2021-04-15 05:17:14,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=1274, Invalid=4578, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 05:17:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9078 states. [2021-04-15 05:17:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9078 to 3617. [2021-04-15 05:17:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3617 states, 3616 states have (on average 3.64712389380531) internal successors, (13188), 3616 states have internal predecessors, (13188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3617 states to 3617 states and 13188 transitions. [2021-04-15 05:17:14,418 INFO L78 Accepts]: Start accepts. Automaton has 3617 states and 13188 transitions. Word has length 32 [2021-04-15 05:17:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:14,418 INFO L480 AbstractCegarLoop]: Abstraction has 3617 states and 13188 transitions. [2021-04-15 05:17:14,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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) [2021-04-15 05:17:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3617 states and 13188 transitions. [2021-04-15 05:17:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:14,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:14,423 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:14,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:14,624 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash 530340736, now seen corresponding path program 22 times [2021-04-15 05:17:14,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:14,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844009226] [2021-04-15 05:17:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:17:14,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844009226] [2021-04-15 05:17:14,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651956623] [2021-04-15 05:17:14,673 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 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 [2021-04-15 05:17:14,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:17:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:14,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:14,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:14,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-04-15 05:17:14,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749401458] [2021-04-15 05:17:14,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:14,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:14,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:14,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:14,850 INFO L87 Difference]: Start difference. First operand 3617 states and 13188 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:17:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:15,813 INFO L93 Difference]: Finished difference Result 12373 states and 41772 transitions. [2021-04-15 05:17:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:17:15,814 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 32 [2021-04-15 05:17:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:15,833 INFO L225 Difference]: With dead ends: 12373 [2021-04-15 05:17:15,834 INFO L226 Difference]: Without dead ends: 12373 [2021-04-15 05:17:15,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:17:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12373 states. [2021-04-15 05:17:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12373 to 3680. [2021-04-15 05:17:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.6610491981516717) internal successors, (13469), 3679 states have internal predecessors, (13469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13469 transitions. [2021-04-15 05:17:15,945 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13469 transitions. Word has length 32 [2021-04-15 05:17:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:15,945 INFO L480 AbstractCegarLoop]: Abstraction has 3680 states and 13469 transitions. [2021-04-15 05:17:15,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:17:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13469 transitions. [2021-04-15 05:17:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:15,949 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:15,949 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:16,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:16,150 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash 839203592, now seen corresponding path program 23 times [2021-04-15 05:17:16,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:16,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105190555] [2021-04-15 05:17:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:17:16,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105190555] [2021-04-15 05:17:16,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756687558] [2021-04-15 05:17:16,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:17:16,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:17:16,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:16,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:16,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:16,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:16,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 05:17:16,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936073361] [2021-04-15 05:17:16,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:17:16,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:16,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:17:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:17:16,381 INFO L87 Difference]: Start difference. First operand 3680 states and 13469 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2021-04-15 05:17:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:17,369 INFO L93 Difference]: Finished difference Result 11569 states and 38849 transitions. [2021-04-15 05:17:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 05:17:17,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 32 [2021-04-15 05:17:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:17,388 INFO L225 Difference]: With dead ends: 11569 [2021-04-15 05:17:17,388 INFO L226 Difference]: Without dead ends: 11569 [2021-04-15 05:17:17,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=691, Invalid=2171, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 05:17:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2021-04-15 05:17:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 3687. [2021-04-15 05:17:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3687 states, 3686 states have (on average 3.6625067824199675) internal successors, (13500), 3686 states have internal predecessors, (13500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 13500 transitions. [2021-04-15 05:17:17,491 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 13500 transitions. Word has length 32 [2021-04-15 05:17:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:17,492 INFO L480 AbstractCegarLoop]: Abstraction has 3687 states and 13500 transitions. [2021-04-15 05:17:17,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2021-04-15 05:17:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 13500 transitions. [2021-04-15 05:17:17,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:17,496 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:17,496 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:17,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-04-15 05:17:17,697 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1608999928, now seen corresponding path program 24 times [2021-04-15 05:17:17,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:17,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382149960] [2021-04-15 05:17:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:17,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382149960] [2021-04-15 05:17:17,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805839150] [2021-04-15 05:17:17,763 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 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 [2021-04-15 05:17:17,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:17:17,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:17,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:17:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:17,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:17,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:17:17,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515805956] [2021-04-15 05:17:17,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:17:17,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:17,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:17:17,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:17:17,933 INFO L87 Difference]: Start difference. First operand 3687 states and 13500 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:20,242 INFO L93 Difference]: Finished difference Result 11049 states and 35399 transitions. [2021-04-15 05:17:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-04-15 05:17:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:17:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:20,259 INFO L225 Difference]: With dead ends: 11049 [2021-04-15 05:17:20,259 INFO L226 Difference]: Without dead ends: 11049 [2021-04-15 05:17:20,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 1648.0ms TimeCoverageRelationStatistics Valid=2969, Invalid=11073, Unknown=0, NotChecked=0, Total=14042 [2021-04-15 05:17:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2021-04-15 05:17:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 3769. [2021-04-15 05:17:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3768 states have (on average 3.6520700636942673) internal successors, (13761), 3768 states have internal predecessors, (13761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 13761 transitions. [2021-04-15 05:17:20,383 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 13761 transitions. Word has length 32 [2021-04-15 05:17:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:20,383 INFO L480 AbstractCegarLoop]: Abstraction has 3769 states and 13761 transitions. [2021-04-15 05:17:20,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:20,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 13761 transitions. [2021-04-15 05:17:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:20,388 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:20,388 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:20,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:20,588 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:20,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1001296282, now seen corresponding path program 25 times [2021-04-15 05:17:20,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:20,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875111102] [2021-04-15 05:17:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:20,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875111102] [2021-04-15 05:17:20,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717183035] [2021-04-15 05:17:20,650 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:20,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:17:20,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:20,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:20,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:17:20,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382264757] [2021-04-15 05:17:20,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:17:20,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:20,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:17:20,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:17:20,796 INFO L87 Difference]: Start difference. First operand 3769 states and 13761 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:22,581 INFO L93 Difference]: Finished difference Result 10568 states and 33987 transitions. [2021-04-15 05:17:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-04-15 05:17:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:17:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:22,599 INFO L225 Difference]: With dead ends: 10568 [2021-04-15 05:17:22,599 INFO L226 Difference]: Without dead ends: 10528 [2021-04-15 05:17:22,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 1192.2ms TimeCoverageRelationStatistics Valid=2003, Invalid=7117, Unknown=0, NotChecked=0, Total=9120 [2021-04-15 05:17:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-04-15 05:17:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 3799. [2021-04-15 05:17:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 3.644023170089521) internal successors, (13840), 3798 states have internal predecessors, (13840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 13840 transitions. [2021-04-15 05:17:22,713 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 13840 transitions. Word has length 32 [2021-04-15 05:17:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:22,713 INFO L480 AbstractCegarLoop]: Abstraction has 3799 states and 13840 transitions. [2021-04-15 05:17:22,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 13840 transitions. [2021-04-15 05:17:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:22,717 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:22,717 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:22,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 05:17:22,918 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:22,921 INFO L82 PathProgramCache]: Analyzing trace with hash 364829428, now seen corresponding path program 26 times [2021-04-15 05:17:22,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:22,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684081280] [2021-04-15 05:17:22,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:22,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684081280] [2021-04-15 05:17:22,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741240541] [2021-04-15 05:17:22,987 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:17:23,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:23,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:17:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:17:23,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:23,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-04-15 05:17:23,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040711873] [2021-04-15 05:17:23,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:23,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:23,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:23,157 INFO L87 Difference]: Start difference. First operand 3799 states and 13840 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:17:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:24,592 INFO L93 Difference]: Finished difference Result 9751 states and 31922 transitions. [2021-04-15 05:17:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-04-15 05:17:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 32 [2021-04-15 05:17:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:24,609 INFO L225 Difference]: With dead ends: 9751 [2021-04-15 05:17:24,610 INFO L226 Difference]: Without dead ends: 9703 [2021-04-15 05:17:24,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=1364, Invalid=5116, Unknown=0, NotChecked=0, Total=6480 [2021-04-15 05:17:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9703 states. [2021-04-15 05:17:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9703 to 3801. [2021-04-15 05:17:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 3.6444736842105265) internal successors, (13849), 3800 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 13849 transitions. [2021-04-15 05:17:24,724 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 13849 transitions. Word has length 32 [2021-04-15 05:17:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:24,724 INFO L480 AbstractCegarLoop]: Abstraction has 3801 states and 13849 transitions. [2021-04-15 05:17:24,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:17:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 13849 transitions. [2021-04-15 05:17:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:24,729 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:24,729 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:24,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 05:17:24,930 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:24,930 INFO L82 PathProgramCache]: Analyzing trace with hash 878521864, now seen corresponding path program 27 times [2021-04-15 05:17:24,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:24,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579370824] [2021-04-15 05:17:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:17:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579370824] [2021-04-15 05:17:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840818270] [2021-04-15 05:17:24,978 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 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 [2021-04-15 05:17:25,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:17:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:17:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:25,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:25,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-04-15 05:17:25,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737637924] [2021-04-15 05:17:25,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:17:25,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:17:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:17:25,192 INFO L87 Difference]: Start difference. First operand 3801 states and 13849 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:17:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:26,059 INFO L93 Difference]: Finished difference Result 14063 states and 48419 transitions. [2021-04-15 05:17:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 05:17:26,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 32 [2021-04-15 05:17:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:26,085 INFO L225 Difference]: With dead ends: 14063 [2021-04-15 05:17:26,086 INFO L226 Difference]: Without dead ends: 14063 [2021-04-15 05:17:26,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:17:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14063 states. [2021-04-15 05:17:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14063 to 4679. [2021-04-15 05:17:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 3.8020521590423257) internal successors, (17786), 4678 states have internal predecessors, (17786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 17786 transitions. [2021-04-15 05:17:26,221 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 17786 transitions. Word has length 32 [2021-04-15 05:17:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:26,221 INFO L480 AbstractCegarLoop]: Abstraction has 4679 states and 17786 transitions. [2021-04-15 05:17:26,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:17:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 17786 transitions. [2021-04-15 05:17:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:26,227 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:26,227 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:26,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:26,428 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 29 times [2021-04-15 05:17:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:26,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350735224] [2021-04-15 05:17:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:26,882 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-04-15 05:17:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:27,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350735224] [2021-04-15 05:17:27,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70937966] [2021-04-15 05:17:27,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:27,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:17:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:17:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-04-15 05:17:27,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:27,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-04-15 05:17:27,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-04-15 05:17:27,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:27,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-04-15 05:17:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-04-15 05:17:27,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:27,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-04-15 05:17:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-04-15 05:17:27,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:27,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:27,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:47 [2021-04-15 05:17:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 05:17:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 39 [2021-04-15 05:17:27,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:27,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:27,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:27,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:45 [2021-04-15 05:17:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:27,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:27,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-04-15 05:17:27,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300702982] [2021-04-15 05:17:27,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 05:17:27,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 05:17:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:17:27,661 INFO L87 Difference]: Start difference. First operand 4679 states and 17786 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:28,062 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-04-15 05:17:28,833 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2021-04-15 05:17:29,288 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-04-15 05:17:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:31,870 INFO L93 Difference]: Finished difference Result 8092 states and 28492 transitions. [2021-04-15 05:17:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:17:31,870 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:17:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:31,883 INFO L225 Difference]: With dead ends: 8092 [2021-04-15 05:17:31,883 INFO L226 Difference]: Without dead ends: 7481 [2021-04-15 05:17:31,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 3879.2ms TimeCoverageRelationStatistics Valid=779, Invalid=5227, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 05:17:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7481 states. [2021-04-15 05:17:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7481 to 5073. [2021-04-15 05:17:31,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5073 states, 5072 states have (on average 3.789826498422713) internal successors, (19222), 5072 states have internal predecessors, (19222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5073 states to 5073 states and 19222 transitions. [2021-04-15 05:17:31,974 INFO L78 Accepts]: Start accepts. Automaton has 5073 states and 19222 transitions. Word has length 32 [2021-04-15 05:17:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:31,975 INFO L480 AbstractCegarLoop]: Abstraction has 5073 states and 19222 transitions. [2021-04-15 05:17:31,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5073 states and 19222 transitions. [2021-04-15 05:17:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:31,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:31,982 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:32,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 05:17:32,182 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:32,183 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 30 times [2021-04-15 05:17:32,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:32,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468875654] [2021-04-15 05:17:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:32,486 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-04-15 05:17:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:32,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468875654] [2021-04-15 05:17:32,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639965279] [2021-04-15 05:17:32,721 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 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 [2021-04-15 05:17:32,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:17:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 05:17:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:32,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:17:32,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:32,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:32,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:32,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-04-15 05:17:32,909 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:17:32,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:17:32,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:32,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:32,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:32,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-04-15 05:17:33,020 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-04-15 05:17:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:17:33,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:33,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:33,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:33,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-04-15 05:17:33,190 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-04-15 05:17:33,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-04-15 05:17:33,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:33,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:33,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:33,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:69 [2021-04-15 05:17:33,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:33,559 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-04-15 05:17:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-04-15 05:17:33,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:33,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:33,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:33,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-04-15 05:17:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:33,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:33,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-04-15 05:17:33,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529014977] [2021-04-15 05:17:33,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 05:17:33,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:33,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 05:17:33,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-04-15 05:17:33,834 INFO L87 Difference]: Start difference. First operand 5073 states and 19222 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:37,403 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-04-15 05:17:37,670 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2021-04-15 05:17:39,807 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-04-15 05:17:42,713 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-04-15 05:17:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:46,764 INFO L93 Difference]: Finished difference Result 9505 states and 33563 transitions. [2021-04-15 05:17:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-04-15 05:17:46,764 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:17:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:46,780 INFO L225 Difference]: With dead ends: 9505 [2021-04-15 05:17:46,780 INFO L226 Difference]: Without dead ends: 8978 [2021-04-15 05:17:46,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 8200.3ms TimeCoverageRelationStatistics Valid=1287, Invalid=6369, Unknown=0, NotChecked=0, Total=7656 [2021-04-15 05:17:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8978 states. [2021-04-15 05:17:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8978 to 6235. [2021-04-15 05:17:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6235 states, 6234 states have (on average 3.693294834777029) internal successors, (23024), 6234 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6235 states to 6235 states and 23024 transitions. [2021-04-15 05:17:46,899 INFO L78 Accepts]: Start accepts. Automaton has 6235 states and 23024 transitions. Word has length 32 [2021-04-15 05:17:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:46,899 INFO L480 AbstractCegarLoop]: Abstraction has 6235 states and 23024 transitions. [2021-04-15 05:17:46,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6235 states and 23024 transitions. [2021-04-15 05:17:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:46,909 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:46,909 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:47,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:17:47,122 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:47,122 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 31 times [2021-04-15 05:17:47,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:47,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631762540] [2021-04-15 05:17:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:47,529 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-04-15 05:17:47,664 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-04-15 05:17:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:47,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631762540] [2021-04-15 05:17:47,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594905728] [2021-04-15 05:17:47,873 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 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 [2021-04-15 05:17:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 05:17:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:48,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:17:48,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:48,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:48,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:48,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-04-15 05:17:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:48,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:17:48,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:48,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:48,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:48,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-04-15 05:17:48,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:48,202 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-04-15 05:17:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:17:48,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:48,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:48,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:48,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:44 [2021-04-15 05:17:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:48,322 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-04-15 05:17:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:17:48,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:48,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:48,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:48,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-04-15 05:17:48,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:48,580 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-04-15 05:17:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-04-15 05:17:48,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:48,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:48,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:48,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:58 [2021-04-15 05:17:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:48,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:48,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 05:17:48,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781021784] [2021-04-15 05:17:48,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 05:17:48,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 05:17:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:17:48,893 INFO L87 Difference]: Start difference. First operand 6235 states and 23024 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:49,329 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-04-15 05:17:49,499 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-04-15 05:17:49,643 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-04-15 05:17:49,851 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-04-15 05:17:50,118 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-04-15 05:17:50,454 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2021-04-15 05:17:50,775 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-04-15 05:17:50,952 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-04-15 05:17:51,142 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-04-15 05:17:51,323 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-04-15 05:17:51,465 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-04-15 05:17:51,749 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-04-15 05:17:51,983 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-04-15 05:17:52,592 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-04-15 05:17:53,023 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-04-15 05:17:53,347 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-04-15 05:17:53,641 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-04-15 05:17:54,466 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-04-15 05:17:54,738 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2021-04-15 05:17:55,073 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2021-04-15 05:17:55,472 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-04-15 05:17:55,783 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2021-04-15 05:17:56,101 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-04-15 05:17:56,373 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-04-15 05:17:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:17:57,417 INFO L93 Difference]: Finished difference Result 9461 states and 33539 transitions. [2021-04-15 05:17:57,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:17:57,418 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:17:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:17:57,433 INFO L225 Difference]: With dead ends: 9461 [2021-04-15 05:17:57,433 INFO L226 Difference]: Without dead ends: 9330 [2021-04-15 05:17:57,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 7330.6ms TimeCoverageRelationStatistics Valid=771, Invalid=4485, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 05:17:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-04-15 05:17:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7112. [2021-04-15 05:17:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 7111 states have (on average 3.676135564618197) internal successors, (26141), 7111 states have internal predecessors, (26141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 26141 transitions. [2021-04-15 05:17:57,623 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 26141 transitions. Word has length 32 [2021-04-15 05:17:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:17:57,623 INFO L480 AbstractCegarLoop]: Abstraction has 7112 states and 26141 transitions. [2021-04-15 05:17:57,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 26141 transitions. [2021-04-15 05:17:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:17:57,634 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:17:57,634 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:17:57,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 05:17:57,855 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:17:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:17:57,856 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 32 times [2021-04-15 05:17:57,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:17:57,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174814632] [2021-04-15 05:17:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:17:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:17:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:58,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174814632] [2021-04-15 05:17:58,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927378691] [2021-04-15 05:17:58,395 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 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 [2021-04-15 05:17:58,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:17:58,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:17:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 05:17:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:17:58,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-04-15 05:17:58,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-04-15 05:17:58,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-04-15 05:17:58,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-04-15 05:17:58,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,720 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-04-15 05:17:58,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-04-15 05:17:58,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:58,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-04-15 05:17:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,861 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-04-15 05:17:58,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-04-15 05:17:58,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:58,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:51 [2021-04-15 05:17:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:17:58,971 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-04-15 05:17:58,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2021-04-15 05:17:58,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:17:58,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:17:58,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:17:58,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-04-15 05:17:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:17:59,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:17:59,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-04-15 05:17:59,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860825364] [2021-04-15 05:17:59,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 05:17:59,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:17:59,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 05:17:59,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-04-15 05:17:59,302 INFO L87 Difference]: Start difference. First operand 7112 states and 26141 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:17:59,846 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-04-15 05:18:00,481 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-04-15 05:18:01,834 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-04-15 05:18:02,649 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-04-15 05:18:02,837 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-04-15 05:18:02,994 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-04-15 05:18:03,780 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-04-15 05:18:04,034 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-04-15 05:18:04,447 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-04-15 05:18:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:04,567 INFO L93 Difference]: Finished difference Result 11524 states and 39694 transitions. [2021-04-15 05:18:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 05:18:04,568 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:18:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:04,588 INFO L225 Difference]: With dead ends: 11524 [2021-04-15 05:18:04,588 INFO L226 Difference]: Without dead ends: 11161 [2021-04-15 05:18:04,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 4603.8ms TimeCoverageRelationStatistics Valid=836, Invalid=4134, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 05:18:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11161 states. [2021-04-15 05:18:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11161 to 7436. [2021-04-15 05:18:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7436 states, 7435 states have (on average 3.662138533960995) internal successors, (27228), 7435 states have internal predecessors, (27228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7436 states to 7436 states and 27228 transitions. [2021-04-15 05:18:04,816 INFO L78 Accepts]: Start accepts. Automaton has 7436 states and 27228 transitions. Word has length 32 [2021-04-15 05:18:04,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:04,816 INFO L480 AbstractCegarLoop]: Abstraction has 7436 states and 27228 transitions. [2021-04-15 05:18:04,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7436 states and 27228 transitions. [2021-04-15 05:18:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:18:04,827 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:04,827 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:05,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:05,028 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:05,028 INFO L82 PathProgramCache]: Analyzing trace with hash 372642824, now seen corresponding path program 33 times [2021-04-15 05:18:05,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:05,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870417515] [2021-04-15 05:18:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:05,408 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 05:18:05,551 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-04-15 05:18:05,686 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-04-15 05:18:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:05,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870417515] [2021-04-15 05:18:05,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887242280] [2021-04-15 05:18:05,963 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 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 [2021-04-15 05:18:05,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:18:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 05:18:05,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-04-15 05:18:06,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:06,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:06,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:18:06,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-04-15 05:18:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:06,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-04-15 05:18:06,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:06,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:06,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:18:06,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-04-15 05:18:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:06,314 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-04-15 05:18:06,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-04-15 05:18:06,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:06,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:06,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:06,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:51 [2021-04-15 05:18:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:06,498 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-04-15 05:18:06,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-04-15 05:18:06,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:06,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:06,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:06,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:63 [2021-04-15 05:18:06,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:06,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:06,676 INFO L354 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2021-04-15 05:18:06,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 43 [2021-04-15 05:18:06,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:06,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:06,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:06,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:70, output treesize:62 [2021-04-15 05:18:07,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:07,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:07,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-04-15 05:18:07,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553684571] [2021-04-15 05:18:07,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 05:18:07,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:07,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 05:18:07,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:18:07,035 INFO L87 Difference]: Start difference. First operand 7436 states and 27228 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:07,705 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-04-15 05:18:08,810 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-04-15 05:18:08,975 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-04-15 05:18:09,390 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-04-15 05:18:09,589 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-04-15 05:18:09,778 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-04-15 05:18:10,072 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-04-15 05:18:10,267 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-04-15 05:18:10,518 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2021-04-15 05:18:11,133 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-04-15 05:18:11,510 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 49 [2021-04-15 05:18:11,699 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-04-15 05:18:12,482 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 68 [2021-04-15 05:18:13,045 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-04-15 05:18:14,336 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-04-15 05:18:14,892 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2021-04-15 05:18:15,107 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 69 [2021-04-15 05:18:15,331 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-04-15 05:18:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:15,875 INFO L93 Difference]: Finished difference Result 12806 states and 42708 transitions. [2021-04-15 05:18:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-04-15 05:18:15,876 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:18:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:15,899 INFO L225 Difference]: With dead ends: 12806 [2021-04-15 05:18:15,899 INFO L226 Difference]: Without dead ends: 12603 [2021-04-15 05:18:15,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 7989.4ms TimeCoverageRelationStatistics Valid=1266, Invalid=6744, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 05:18:15,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12603 states. [2021-04-15 05:18:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12603 to 7670. [2021-04-15 05:18:16,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7670 states, 7669 states have (on average 3.6660581562133263) internal successors, (28115), 7669 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7670 states to 7670 states and 28115 transitions. [2021-04-15 05:18:16,047 INFO L78 Accepts]: Start accepts. Automaton has 7670 states and 28115 transitions. Word has length 32 [2021-04-15 05:18:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:16,048 INFO L480 AbstractCegarLoop]: Abstraction has 7670 states and 28115 transitions. [2021-04-15 05:18:16,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:16,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7670 states and 28115 transitions. [2021-04-15 05:18:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:18:16,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:16,058 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:16,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-04-15 05:18:16,259 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:16,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1841137736, now seen corresponding path program 34 times [2021-04-15 05:18:16,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:16,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251901069] [2021-04-15 05:18:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:16,720 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-04-15 05:18:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:16,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251901069] [2021-04-15 05:18:16,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347654013] [2021-04-15 05:18:16,979 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 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 [2021-04-15 05:18:17,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:18:17,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:17,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 05:18:17,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:17,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-04-15 05:18:17,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:17,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:17,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:18:17,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-04-15 05:18:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:17,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-04-15 05:18:17,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:17,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:17,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:18:17,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-04-15 05:18:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:17,257 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-04-15 05:18:17,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-04-15 05:18:17,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:17,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:17,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:17,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:40 [2021-04-15 05:18:17,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:17,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 27 treesize of output 27 [2021-04-15 05:18:17,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:17,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:17,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:17,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:33 [2021-04-15 05:18:17,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:17,410 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-04-15 05:18:17,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-04-15 05:18:17,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:17,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:17,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:17,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:45 [2021-04-15 05:18:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:18:17,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:17,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-04-15 05:18:17,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410663703] [2021-04-15 05:18:17,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:18:17,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:18:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:18:17,698 INFO L87 Difference]: Start difference. First operand 7670 states and 28115 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:18,096 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-04-15 05:18:18,493 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-04-15 05:18:19,367 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-04-15 05:18:19,682 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-04-15 05:18:19,928 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-04-15 05:18:20,329 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-04-15 05:18:20,502 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-04-15 05:18:20,942 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-04-15 05:18:21,351 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-04-15 05:18:21,579 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-04-15 05:18:21,845 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-04-15 05:18:22,138 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2021-04-15 05:18:22,824 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2021-04-15 05:18:23,018 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-04-15 05:18:23,726 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-04-15 05:18:24,200 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-04-15 05:18:24,466 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-04-15 05:18:24,654 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-04-15 05:18:25,201 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2021-04-15 05:18:25,470 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-04-15 05:18:26,061 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 75 [2021-04-15 05:18:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:26,172 INFO L93 Difference]: Finished difference Result 15041 states and 50266 transitions. [2021-04-15 05:18:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 05:18:26,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:18:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:26,197 INFO L225 Difference]: With dead ends: 15041 [2021-04-15 05:18:26,197 INFO L226 Difference]: Without dead ends: 14093 [2021-04-15 05:18:26,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 7827.0ms TimeCoverageRelationStatistics Valid=1184, Invalid=5622, Unknown=0, NotChecked=0, Total=6806 [2021-04-15 05:18:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14093 states. [2021-04-15 05:18:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14093 to 7981. [2021-04-15 05:18:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 3.6159147869674184) internal successors, (28855), 7980 states have internal predecessors, (28855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 28855 transitions. [2021-04-15 05:18:26,354 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 28855 transitions. Word has length 32 [2021-04-15 05:18:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:26,354 INFO L480 AbstractCegarLoop]: Abstraction has 7981 states and 28855 transitions. [2021-04-15 05:18:26,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 28855 transitions. [2021-04-15 05:18:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 05:18:26,366 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:26,366 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:26,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:26,569 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:26,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:26,570 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 35 times [2021-04-15 05:18:26,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:26,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214525573] [2021-04-15 05:18:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:27,020 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-04-15 05:18:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:27,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214525573] [2021-04-15 05:18:27,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657193744] [2021-04-15 05:18:27,255 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:27,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 05:18:27,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 05:18:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:27,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:18:27,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:27,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:27,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:18:27,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-04-15 05:18:27,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:18:27,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:27,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:27,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:18:27,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-04-15 05:18:27,559 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-04-15 05:18:27,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:18:27,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:27,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:27,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:27,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-04-15 05:18:27,748 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-04-15 05:18:27,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-04-15 05:18:27,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:27,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:27,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:27,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-04-15 05:18:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:28,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:28,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-04-15 05:18:28,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824702571] [2021-04-15 05:18:28,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 05:18:28,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:28,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 05:18:28,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:18:28,013 INFO L87 Difference]: Start difference. First operand 7981 states and 28855 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:30,870 INFO L93 Difference]: Finished difference Result 14712 states and 50770 transitions. [2021-04-15 05:18:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:18:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 05:18:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:30,897 INFO L225 Difference]: With dead ends: 14712 [2021-04-15 05:18:30,897 INFO L226 Difference]: Without dead ends: 14295 [2021-04-15 05:18:30,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2034.6ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:18:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14295 states. [2021-04-15 05:18:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14295 to 7431. [2021-04-15 05:18:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7431 states, 7430 states have (on average 3.677658142664872) internal successors, (27325), 7430 states have internal predecessors, (27325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7431 states to 7431 states and 27325 transitions. [2021-04-15 05:18:31,102 INFO L78 Accepts]: Start accepts. Automaton has 7431 states and 27325 transitions. Word has length 32 [2021-04-15 05:18:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:31,103 INFO L480 AbstractCegarLoop]: Abstraction has 7431 states and 27325 transitions. [2021-04-15 05:18:31,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7431 states and 27325 transitions. [2021-04-15 05:18:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:31,113 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:31,114 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:31,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 05:18:31,314 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:31,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1539718298, now seen corresponding path program 28 times [2021-04-15 05:18:31,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:31,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872604570] [2021-04-15 05:18:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:31,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872604570] [2021-04-15 05:18:31,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439097507] [2021-04-15 05:18:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:31,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:18:31,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:31,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:18:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:31,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:31,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-04-15 05:18:31,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807099905] [2021-04-15 05:18:31,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:18:31,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:18:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:18:31,686 INFO L87 Difference]: Start difference. First operand 7431 states and 27325 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:32,432 INFO L93 Difference]: Finished difference Result 12227 states and 42154 transitions. [2021-04-15 05:18:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 05:18:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:18:32,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:32,456 INFO L225 Difference]: With dead ends: 12227 [2021-04-15 05:18:32,457 INFO L226 Difference]: Without dead ends: 12227 [2021-04-15 05:18:32,457 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 05:18:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12227 states. [2021-04-15 05:18:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12227 to 8555. [2021-04-15 05:18:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8555 states, 8554 states have (on average 3.6043956043956045) internal successors, (30832), 8554 states have internal predecessors, (30832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8555 states to 8555 states and 30832 transitions. [2021-04-15 05:18:32,618 INFO L78 Accepts]: Start accepts. Automaton has 8555 states and 30832 transitions. Word has length 34 [2021-04-15 05:18:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:32,618 INFO L480 AbstractCegarLoop]: Abstraction has 8555 states and 30832 transitions. [2021-04-15 05:18:32,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 8555 states and 30832 transitions. [2021-04-15 05:18:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:32,630 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:32,630 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:32,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:32,831 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:32,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1699871604, now seen corresponding path program 29 times [2021-04-15 05:18:32,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:32,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892916281] [2021-04-15 05:18:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:32,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892916281] [2021-04-15 05:18:32,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057384542] [2021-04-15 05:18:32,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:32,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:18:32,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:32,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:18:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:18:33,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:33,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-04-15 05:18:33,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196042668] [2021-04-15 05:18:33,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:18:33,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:18:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:18:33,166 INFO L87 Difference]: Start difference. First operand 8555 states and 30832 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:34,789 INFO L93 Difference]: Finished difference Result 13292 states and 44861 transitions. [2021-04-15 05:18:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 05:18:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:18:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:34,812 INFO L225 Difference]: With dead ends: 13292 [2021-04-15 05:18:34,812 INFO L226 Difference]: Without dead ends: 13292 [2021-04-15 05:18:34,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 1207.6ms TimeCoverageRelationStatistics Valid=1019, Invalid=4383, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 05:18:34,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13292 states. [2021-04-15 05:18:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13292 to 8677. [2021-04-15 05:18:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8677 states, 8676 states have (on average 3.596934071000461) internal successors, (31207), 8676 states have internal predecessors, (31207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8677 states to 8677 states and 31207 transitions. [2021-04-15 05:18:34,993 INFO L78 Accepts]: Start accepts. Automaton has 8677 states and 31207 transitions. Word has length 34 [2021-04-15 05:18:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:34,993 INFO L480 AbstractCegarLoop]: Abstraction has 8677 states and 31207 transitions. [2021-04-15 05:18:34,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8677 states and 31207 transitions. [2021-04-15 05:18:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:35,007 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:35,007 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:35,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-04-15 05:18:35,208 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:35,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1909728636, now seen corresponding path program 30 times [2021-04-15 05:18:35,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:35,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544300355] [2021-04-15 05:18:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544300355] [2021-04-15 05:18:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60068944] [2021-04-15 05:18:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:35,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:18:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:35,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:18:35,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:35,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:35,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-04-15 05:18:35,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941700711] [2021-04-15 05:18:35,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:18:35,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:35,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:18:35,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:18:35,480 INFO L87 Difference]: Start difference. First operand 8677 states and 31207 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:36,447 INFO L93 Difference]: Finished difference Result 12421 states and 42959 transitions. [2021-04-15 05:18:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 05:18:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:18:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:36,470 INFO L225 Difference]: With dead ends: 12421 [2021-04-15 05:18:36,470 INFO L226 Difference]: Without dead ends: 12409 [2021-04-15 05:18:36,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 662.7ms TimeCoverageRelationStatistics Valid=520, Invalid=2030, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:18:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12409 states. [2021-04-15 05:18:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12409 to 8715. [2021-04-15 05:18:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8715 states, 8714 states have (on average 3.594675235253615) internal successors, (31324), 8714 states have internal predecessors, (31324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8715 states to 8715 states and 31324 transitions. [2021-04-15 05:18:36,632 INFO L78 Accepts]: Start accepts. Automaton has 8715 states and 31324 transitions. Word has length 34 [2021-04-15 05:18:36,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:36,632 INFO L480 AbstractCegarLoop]: Abstraction has 8715 states and 31324 transitions. [2021-04-15 05:18:36,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 8715 states and 31324 transitions. [2021-04-15 05:18:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:36,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:36,645 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:36,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-15 05:18:36,849 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash 150437974, now seen corresponding path program 31 times [2021-04-15 05:18:36,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:36,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573358473] [2021-04-15 05:18:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:36,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573358473] [2021-04-15 05:18:36,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079070790] [2021-04-15 05:18:36,949 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 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 [2021-04-15 05:18:36,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:36,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:18:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 05:18:37,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:37,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:18:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892642128] [2021-04-15 05:18:37,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:18:37,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:18:37,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:18:37,144 INFO L87 Difference]: Start difference. First operand 8715 states and 31324 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:37,887 INFO L93 Difference]: Finished difference Result 12190 states and 42541 transitions. [2021-04-15 05:18:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 05:18:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:18:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:37,909 INFO L225 Difference]: With dead ends: 12190 [2021-04-15 05:18:37,909 INFO L226 Difference]: Without dead ends: 12154 [2021-04-15 05:18:37,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1368, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:18:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12154 states. [2021-04-15 05:18:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12154 to 8771. [2021-04-15 05:18:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8771 states, 8770 states have (on average 3.5904218928164195) internal successors, (31488), 8770 states have internal predecessors, (31488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8771 states to 8771 states and 31488 transitions. [2021-04-15 05:18:38,065 INFO L78 Accepts]: Start accepts. Automaton has 8771 states and 31488 transitions. Word has length 34 [2021-04-15 05:18:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:38,065 INFO L480 AbstractCegarLoop]: Abstraction has 8771 states and 31488 transitions. [2021-04-15 05:18:38,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8771 states and 31488 transitions. [2021-04-15 05:18:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:38,077 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:38,077 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:38,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-04-15 05:18:38,277 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1876456102, now seen corresponding path program 32 times [2021-04-15 05:18:38,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:38,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130805375] [2021-04-15 05:18:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:38,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130805375] [2021-04-15 05:18:38,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558088514] [2021-04-15 05:18:38,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:38,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:18:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:18:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 05:18:38,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:38,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:18:38,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697931301] [2021-04-15 05:18:38,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:18:38,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:18:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:18:38,528 INFO L87 Difference]: Start difference. First operand 8771 states and 31488 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:18:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:38,985 INFO L93 Difference]: Finished difference Result 11808 states and 41522 transitions. [2021-04-15 05:18:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 05:18:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 34 [2021-04-15 05:18:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:39,007 INFO L225 Difference]: With dead ends: 11808 [2021-04-15 05:18:39,008 INFO L226 Difference]: Without dead ends: 11748 [2021-04-15 05:18:39,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 263.6ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-04-15 05:18:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11748 states. [2021-04-15 05:18:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11748 to 8789. [2021-04-15 05:18:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8789 states, 8788 states have (on average 3.5890987710514337) internal successors, (31541), 8788 states have internal predecessors, (31541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8789 states to 8789 states and 31541 transitions. [2021-04-15 05:18:39,161 INFO L78 Accepts]: Start accepts. Automaton has 8789 states and 31541 transitions. Word has length 34 [2021-04-15 05:18:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:39,161 INFO L480 AbstractCegarLoop]: Abstraction has 8789 states and 31541 transitions. [2021-04-15 05:18:39,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:18:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 8789 states and 31541 transitions. [2021-04-15 05:18:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:39,173 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:39,173 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:39,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:39,375 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1845655966, now seen corresponding path program 33 times [2021-04-15 05:18:39,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:39,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807890881] [2021-04-15 05:18:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:39,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807890881] [2021-04-15 05:18:39,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517680981] [2021-04-15 05:18:39,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:39,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:18:39,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:39,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 05:18:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:39,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-04-15 05:18:39,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:39,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:39,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:18:39,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-04-15 05:18:39,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:18:39,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-04-15 05:18:39,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:18:39,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:18:39,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:18:39,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-04-15 05:18:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:18:39,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:39,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 05:18:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443417290] [2021-04-15 05:18:39,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:18:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:18:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:18:39,884 INFO L87 Difference]: Start difference. First operand 8789 states and 31541 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:42,512 INFO L93 Difference]: Finished difference Result 16172 states and 53958 transitions. [2021-04-15 05:18:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 05:18:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:18:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:42,544 INFO L225 Difference]: With dead ends: 16172 [2021-04-15 05:18:42,545 INFO L226 Difference]: Without dead ends: 16172 [2021-04-15 05:18:42,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 1877.7ms TimeCoverageRelationStatistics Valid=1249, Invalid=5231, Unknown=0, NotChecked=0, Total=6480 [2021-04-15 05:18:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16172 states. [2021-04-15 05:18:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16172 to 8975. [2021-04-15 05:18:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8975 states, 8974 states have (on average 3.59605527078226) internal successors, (32271), 8974 states have internal predecessors, (32271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 32271 transitions. [2021-04-15 05:18:42,743 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 32271 transitions. Word has length 34 [2021-04-15 05:18:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:42,743 INFO L480 AbstractCegarLoop]: Abstraction has 8975 states and 32271 transitions. [2021-04-15 05:18:42,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 32271 transitions. [2021-04-15 05:18:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:42,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:42,756 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:42,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 05:18:42,956 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1393933936, now seen corresponding path program 34 times [2021-04-15 05:18:42,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:42,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789023138] [2021-04-15 05:18:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:43,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789023138] [2021-04-15 05:18:43,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545649468] [2021-04-15 05:18:43,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 05:18:43,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:18:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 05:18:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:18:43,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:43,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 05:18:43,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339253175] [2021-04-15 05:18:43,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:18:43,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:43,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:18:43,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:18:43,294 INFO L87 Difference]: Start difference. First operand 8975 states and 32271 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-04-15 05:18:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:44,803 INFO L93 Difference]: Finished difference Result 24036 states and 79889 transitions. [2021-04-15 05:18:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:18:44,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 34 [2021-04-15 05:18:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:44,848 INFO L225 Difference]: With dead ends: 24036 [2021-04-15 05:18:44,848 INFO L226 Difference]: Without dead ends: 24032 [2021-04-15 05:18:44,848 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 838.8ms TimeCoverageRelationStatistics Valid=841, Invalid=2699, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:18:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24032 states. [2021-04-15 05:18:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24032 to 11047. [2021-04-15 05:18:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11047 states, 11046 states have (on average 3.7311243889190657) internal successors, (41214), 11046 states have internal predecessors, (41214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11047 states to 11047 states and 41214 transitions. [2021-04-15 05:18:45,155 INFO L78 Accepts]: Start accepts. Automaton has 11047 states and 41214 transitions. Word has length 34 [2021-04-15 05:18:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:45,155 INFO L480 AbstractCegarLoop]: Abstraction has 11047 states and 41214 transitions. [2021-04-15 05:18:45,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-04-15 05:18:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 11047 states and 41214 transitions. [2021-04-15 05:18:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:45,171 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:45,171 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:45,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:45,372 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:45,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:45,372 INFO L82 PathProgramCache]: Analyzing trace with hash 764640244, now seen corresponding path program 35 times [2021-04-15 05:18:45,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:45,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690633370] [2021-04-15 05:18:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:45,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690633370] [2021-04-15 05:18:45,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634071714] [2021-04-15 05:18:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:45,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 05:18:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:18:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:45,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:45,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-04-15 05:18:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77519501] [2021-04-15 05:18:45,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:18:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:18:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:18:45,657 INFO L87 Difference]: Start difference. First operand 11047 states and 41214 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-04-15 05:18:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:46,801 INFO L93 Difference]: Finished difference Result 22537 states and 75410 transitions. [2021-04-15 05:18:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:18:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 34 [2021-04-15 05:18:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:46,844 INFO L225 Difference]: With dead ends: 22537 [2021-04-15 05:18:46,844 INFO L226 Difference]: Without dead ends: 22509 [2021-04-15 05:18:46,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:18:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22509 states. [2021-04-15 05:18:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22509 to 11049. [2021-04-15 05:18:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11049 states, 11048 states have (on average 3.730720492396814) internal successors, (41217), 11048 states have internal predecessors, (41217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11049 states to 11049 states and 41217 transitions. [2021-04-15 05:18:47,199 INFO L78 Accepts]: Start accepts. Automaton has 11049 states and 41217 transitions. Word has length 34 [2021-04-15 05:18:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:47,199 INFO L480 AbstractCegarLoop]: Abstraction has 11049 states and 41217 transitions. [2021-04-15 05:18:47,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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) [2021-04-15 05:18:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 11049 states and 41217 transitions. [2021-04-15 05:18:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 05:18:47,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:47,216 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:47,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-04-15 05:18:47,416 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash 338290534, now seen corresponding path program 36 times [2021-04-15 05:18:47,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:47,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863935919] [2021-04-15 05:18:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:47,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863935919] [2021-04-15 05:18:47,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614741517] [2021-04-15 05:18:47,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:47,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:18:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 05:18:47,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:18:47,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:47,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-04-15 05:18:47,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506245039] [2021-04-15 05:18:47,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:18:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:47,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:18:47,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:18:47,684 INFO L87 Difference]: Start difference. First operand 11049 states and 41217 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:50,124 INFO L93 Difference]: Finished difference Result 29555 states and 100040 transitions. [2021-04-15 05:18:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-04-15 05:18:50,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 05:18:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:50,185 INFO L225 Difference]: With dead ends: 29555 [2021-04-15 05:18:50,185 INFO L226 Difference]: Without dead ends: 29555 [2021-04-15 05:18:50,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 1458.0ms TimeCoverageRelationStatistics Valid=1869, Invalid=6503, Unknown=0, NotChecked=0, Total=8372 [2021-04-15 05:18:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-04-15 05:18:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 12824. [2021-04-15 05:18:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12824 states, 12823 states have (on average 3.804257973953053) internal successors, (48782), 12823 states have internal predecessors, (48782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12824 states to 12824 states and 48782 transitions. [2021-04-15 05:18:50,697 INFO L78 Accepts]: Start accepts. Automaton has 12824 states and 48782 transitions. Word has length 34 [2021-04-15 05:18:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:50,697 INFO L480 AbstractCegarLoop]: Abstraction has 12824 states and 48782 transitions. [2021-04-15 05:18:50,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 12824 states and 48782 transitions. [2021-04-15 05:18:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:18:50,717 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:50,717 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:50,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:50,918 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 36 times [2021-04-15 05:18:50,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:50,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653457396] [2021-04-15 05:18:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:51,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653457396] [2021-04-15 05:18:51,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974629242] [2021-04-15 05:18:51,040 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 [2021-04-15 05:18:51,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:18:51,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:51,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:18:51,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:18:51,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:51,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-04-15 05:18:51,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533230881] [2021-04-15 05:18:51,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:18:51,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:18:51,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:18:51,329 INFO L87 Difference]: Start difference. First operand 12824 states and 48782 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:55,608 INFO L93 Difference]: Finished difference Result 33922 states and 120694 transitions. [2021-04-15 05:18:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-04-15 05:18:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:18:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:55,680 INFO L225 Difference]: With dead ends: 33922 [2021-04-15 05:18:55,681 INFO L226 Difference]: Without dead ends: 33922 [2021-04-15 05:18:55,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 2772.8ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-04-15 05:18:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33922 states. [2021-04-15 05:18:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33922 to 14713. [2021-04-15 05:18:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14713 states, 14712 states have (on average 3.884448069603045) internal successors, (57148), 14712 states have internal predecessors, (57148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14713 states to 14713 states and 57148 transitions. [2021-04-15 05:18:56,143 INFO L78 Accepts]: Start accepts. Automaton has 14713 states and 57148 transitions. Word has length 36 [2021-04-15 05:18:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:56,143 INFO L480 AbstractCegarLoop]: Abstraction has 14713 states and 57148 transitions. [2021-04-15 05:18:56,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 14713 states and 57148 transitions. [2021-04-15 05:18:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:18:56,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:56,166 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:56,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:56,369 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 37 times [2021-04-15 05:18:56,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:56,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107023755] [2021-04-15 05:18:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:56,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107023755] [2021-04-15 05:18:56,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162016816] [2021-04-15 05:18:56,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 05:18:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:18:56,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:56,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:56,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 05:18:56,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960857712] [2021-04-15 05:18:56,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:18:56,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:18:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:18:56,789 INFO L87 Difference]: Start difference. First operand 14713 states and 57148 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:18:58,935 INFO L93 Difference]: Finished difference Result 31951 states and 113896 transitions. [2021-04-15 05:18:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 05:18:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:18:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:18:59,001 INFO L225 Difference]: With dead ends: 31951 [2021-04-15 05:18:59,001 INFO L226 Difference]: Without dead ends: 31951 [2021-04-15 05:18:59,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1301.1ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-04-15 05:18:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31951 states. [2021-04-15 05:18:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31951 to 14321. [2021-04-15 05:18:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14321 states, 14320 states have (on average 3.8514664804469274) internal successors, (55153), 14320 states have internal predecessors, (55153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14321 states to 14321 states and 55153 transitions. [2021-04-15 05:18:59,422 INFO L78 Accepts]: Start accepts. Automaton has 14321 states and 55153 transitions. Word has length 36 [2021-04-15 05:18:59,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:18:59,422 INFO L480 AbstractCegarLoop]: Abstraction has 14321 states and 55153 transitions. [2021-04-15 05:18:59,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:18:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 14321 states and 55153 transitions. [2021-04-15 05:18:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:18:59,444 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:18:59,444 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:18:59,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:18:59,645 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:18:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:18:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 38 times [2021-04-15 05:18:59,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:18:59,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074210427] [2021-04-15 05:18:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:18:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:18:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:59,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074210427] [2021-04-15 05:18:59,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458913496] [2021-04-15 05:18:59,739 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 [2021-04-15 05:18:59,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:18:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:18:59,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:18:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:18:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:18:59,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:18:59,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-04-15 05:18:59,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540280813] [2021-04-15 05:18:59,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:18:59,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:18:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:18:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:18:59,986 INFO L87 Difference]: Start difference. First operand 14321 states and 55153 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:01,503 INFO L93 Difference]: Finished difference Result 27759 states and 99712 transitions. [2021-04-15 05:19:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:19:01,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:01,563 INFO L225 Difference]: With dead ends: 27759 [2021-04-15 05:19:01,563 INFO L226 Difference]: Without dead ends: 27759 [2021-04-15 05:19:01,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 797.3ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:19:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27759 states. [2021-04-15 05:19:01,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27759 to 14534. [2021-04-15 05:19:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14534 states, 14533 states have (on average 3.8374045276267803) internal successors, (55769), 14533 states have internal predecessors, (55769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14534 states to 14534 states and 55769 transitions. [2021-04-15 05:19:01,957 INFO L78 Accepts]: Start accepts. Automaton has 14534 states and 55769 transitions. Word has length 36 [2021-04-15 05:19:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:01,957 INFO L480 AbstractCegarLoop]: Abstraction has 14534 states and 55769 transitions. [2021-04-15 05:19:01,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14534 states and 55769 transitions. [2021-04-15 05:19:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:01,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:01,981 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:02,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 05:19:02,182 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:02,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 39 times [2021-04-15 05:19:02,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:02,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027569203] [2021-04-15 05:19:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:02,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027569203] [2021-04-15 05:19:02,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408250340] [2021-04-15 05:19:02,316 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 [2021-04-15 05:19:02,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 05:19:02,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:02,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 05:19:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:02,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:19:02,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:02,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:02,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:19:02,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-04-15 05:19:02,598 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:19:02,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:19:02,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:02,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:02,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:19:02,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-04-15 05:19:02,814 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-04-15 05:19:02,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:19:02,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:02,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:02,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:19:02,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-04-15 05:19:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-04-15 05:19:02,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:02,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-04-15 05:19:02,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723504796] [2021-04-15 05:19:02,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:19:02,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:19:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:19:02,985 INFO L87 Difference]: Start difference. First operand 14534 states and 55769 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:12,288 INFO L93 Difference]: Finished difference Result 30005 states and 104469 transitions. [2021-04-15 05:19:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-04-15 05:19:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:12,350 INFO L225 Difference]: With dead ends: 30005 [2021-04-15 05:19:12,350 INFO L226 Difference]: Without dead ends: 29779 [2021-04-15 05:19:12,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 5366.6ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-04-15 05:19:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29779 states. [2021-04-15 05:19:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29779 to 16232. [2021-04-15 05:19:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16232 states, 16231 states have (on average 3.8969872466268254) internal successors, (63252), 16231 states have internal predecessors, (63252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16232 states to 16232 states and 63252 transitions. [2021-04-15 05:19:12,910 INFO L78 Accepts]: Start accepts. Automaton has 16232 states and 63252 transitions. Word has length 36 [2021-04-15 05:19:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:12,910 INFO L480 AbstractCegarLoop]: Abstraction has 16232 states and 63252 transitions. [2021-04-15 05:19:12,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 16232 states and 63252 transitions. [2021-04-15 05:19:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:12,936 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:12,937 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:13,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:13,137 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:13,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 40 times [2021-04-15 05:19:13,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:13,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785870507] [2021-04-15 05:19:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:13,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785870507] [2021-04-15 05:19:13,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583583571] [2021-04-15 05:19:13,223 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 [2021-04-15 05:19:13,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:19:13,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:19:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:19:13,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:13,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 05:19:13,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971193345] [2021-04-15 05:19:13,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:19:13,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:19:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:19:13,509 INFO L87 Difference]: Start difference. First operand 16232 states and 63252 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:17,149 INFO L93 Difference]: Finished difference Result 33064 states and 118366 transitions. [2021-04-15 05:19:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-04-15 05:19:17,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:17,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:17,228 INFO L225 Difference]: With dead ends: 33064 [2021-04-15 05:19:17,228 INFO L226 Difference]: Without dead ends: 33056 [2021-04-15 05:19:17,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 2134.9ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-04-15 05:19:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33056 states. [2021-04-15 05:19:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33056 to 16203. [2021-04-15 05:19:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16203 states, 16202 states have (on average 3.897481792371312) internal successors, (63147), 16202 states have internal predecessors, (63147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16203 states to 16203 states and 63147 transitions. [2021-04-15 05:19:17,851 INFO L78 Accepts]: Start accepts. Automaton has 16203 states and 63147 transitions. Word has length 36 [2021-04-15 05:19:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:17,851 INFO L480 AbstractCegarLoop]: Abstraction has 16203 states and 63147 transitions. [2021-04-15 05:19:17,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 16203 states and 63147 transitions. [2021-04-15 05:19:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:17,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:17,877 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:18,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:18,078 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:18,079 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 41 times [2021-04-15 05:19:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:18,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833910751] [2021-04-15 05:19:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:18,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833910751] [2021-04-15 05:19:18,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320117931] [2021-04-15 05:19:18,299 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 [2021-04-15 05:19:18,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:19:18,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:19:18,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:19:18,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:18,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 05:19:18,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467940295] [2021-04-15 05:19:18,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:19:18,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:19:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:19:18,615 INFO L87 Difference]: Start difference. First operand 16203 states and 63147 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:23,644 INFO L93 Difference]: Finished difference Result 36385 states and 129883 transitions. [2021-04-15 05:19:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-04-15 05:19:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:23,731 INFO L225 Difference]: With dead ends: 36385 [2021-04-15 05:19:23,731 INFO L226 Difference]: Without dead ends: 36385 [2021-04-15 05:19:23,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8689 ImplicationChecksByTransitivity, 3213.3ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-04-15 05:19:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36385 states. [2021-04-15 05:19:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36385 to 16302. [2021-04-15 05:19:24,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16302 states, 16301 states have (on average 3.903748236304521) internal successors, (63635), 16301 states have internal predecessors, (63635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16302 states to 16302 states and 63635 transitions. [2021-04-15 05:19:24,404 INFO L78 Accepts]: Start accepts. Automaton has 16302 states and 63635 transitions. Word has length 36 [2021-04-15 05:19:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:24,405 INFO L480 AbstractCegarLoop]: Abstraction has 16302 states and 63635 transitions. [2021-04-15 05:19:24,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 16302 states and 63635 transitions. [2021-04-15 05:19:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:24,431 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:24,431 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:24,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-15 05:19:24,631 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 42 times [2021-04-15 05:19:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:24,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884009232] [2021-04-15 05:19:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884009232] [2021-04-15 05:19:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939502067] [2021-04-15 05:19:24,738 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 [2021-04-15 05:19:24,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 05:19:24,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:19:24,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:25,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:25,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-04-15 05:19:25,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517807293] [2021-04-15 05:19:25,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:19:25,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:25,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:19:25,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:19:25,137 INFO L87 Difference]: Start difference. First operand 16302 states and 63635 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:26,927 INFO L93 Difference]: Finished difference Result 33311 states and 121916 transitions. [2021-04-15 05:19:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:19:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:27,005 INFO L225 Difference]: With dead ends: 33311 [2021-04-15 05:19:27,005 INFO L226 Difference]: Without dead ends: 33299 [2021-04-15 05:19:27,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1013.5ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 05:19:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33299 states. [2021-04-15 05:19:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33299 to 16301. [2021-04-15 05:19:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16301 states, 16300 states have (on average 3.903680981595092) internal successors, (63630), 16300 states have internal predecessors, (63630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16301 states to 16301 states and 63630 transitions. [2021-04-15 05:19:27,582 INFO L78 Accepts]: Start accepts. Automaton has 16301 states and 63630 transitions. Word has length 36 [2021-04-15 05:19:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:27,582 INFO L480 AbstractCegarLoop]: Abstraction has 16301 states and 63630 transitions. [2021-04-15 05:19:27,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 16301 states and 63630 transitions. [2021-04-15 05:19:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:27,607 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:27,607 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:27,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 05:19:27,808 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:27,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:27,808 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 43 times [2021-04-15 05:19:27,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:27,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436738606] [2021-04-15 05:19:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:27,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436738606] [2021-04-15 05:19:27,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169244665] [2021-04-15 05:19:27,922 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 [2021-04-15 05:19:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:27,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:19:27,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:28,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:28,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-04-15 05:19:28,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552131232] [2021-04-15 05:19:28,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:19:28,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:19:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:19:28,241 INFO L87 Difference]: Start difference. First operand 16301 states and 63630 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:19:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:29,815 INFO L93 Difference]: Finished difference Result 30739 states and 112830 transitions. [2021-04-15 05:19:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 05:19:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 36 [2021-04-15 05:19:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:29,879 INFO L225 Difference]: With dead ends: 30739 [2021-04-15 05:19:29,880 INFO L226 Difference]: Without dead ends: 30739 [2021-04-15 05:19:29,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 894.2ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:19:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30739 states. [2021-04-15 05:19:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30739 to 16335. [2021-04-15 05:19:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16335 states, 16334 states have (on average 3.903085588343333) internal successors, (63753), 16334 states have internal predecessors, (63753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16335 states to 16335 states and 63753 transitions. [2021-04-15 05:19:30,358 INFO L78 Accepts]: Start accepts. Automaton has 16335 states and 63753 transitions. Word has length 36 [2021-04-15 05:19:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:30,358 INFO L480 AbstractCegarLoop]: Abstraction has 16335 states and 63753 transitions. [2021-04-15 05:19:30,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:19:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 16335 states and 63753 transitions. [2021-04-15 05:19:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:30,385 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:30,385 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:30,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:30,585 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:30,585 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 44 times [2021-04-15 05:19:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:30,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722247426] [2021-04-15 05:19:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:30,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722247426] [2021-04-15 05:19:30,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123550430] [2021-04-15 05:19:30,816 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 [2021-04-15 05:19:30,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:19:30,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:30,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:19:30,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:31,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:31,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-04-15 05:19:31,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959893765] [2021-04-15 05:19:31,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:19:31,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:19:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:19:31,158 INFO L87 Difference]: Start difference. First operand 16335 states and 63753 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:33,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:33,438 INFO L93 Difference]: Finished difference Result 32336 states and 117254 transitions. [2021-04-15 05:19:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-04-15 05:19:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:33,520 INFO L225 Difference]: With dead ends: 32336 [2021-04-15 05:19:33,520 INFO L226 Difference]: Without dead ends: 32336 [2021-04-15 05:19:33,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 1411.3ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 05:19:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32336 states. [2021-04-15 05:19:33,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32336 to 16047. [2021-04-15 05:19:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16047 states, 16046 states have (on average 3.864576841580456) internal successors, (62011), 16046 states have internal predecessors, (62011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16047 states to 16047 states and 62011 transitions. [2021-04-15 05:19:34,045 INFO L78 Accepts]: Start accepts. Automaton has 16047 states and 62011 transitions. Word has length 36 [2021-04-15 05:19:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:34,045 INFO L480 AbstractCegarLoop]: Abstraction has 16047 states and 62011 transitions. [2021-04-15 05:19:34,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:34,045 INFO L276 IsEmpty]: Start isEmpty. Operand 16047 states and 62011 transitions. [2021-04-15 05:19:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:34,070 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:34,070 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:34,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:34,271 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:34,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 45 times [2021-04-15 05:19:34,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:34,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532581731] [2021-04-15 05:19:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:34,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532581731] [2021-04-15 05:19:34,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311407922] [2021-04-15 05:19:34,412 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 [2021-04-15 05:19:34,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:19:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:34,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 05:19:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:34,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:19:34,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:34,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:34,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:19:34,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-04-15 05:19:34,804 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:19:34,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:19:34,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:34,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:34,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:19:34,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-04-15 05:19:35,009 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-04-15 05:19:35,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:19:35,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:19:35,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:19:35,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:19:35,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-04-15 05:19:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-04-15 05:19:35,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:35,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 05:19:35,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787912605] [2021-04-15 05:19:35,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:19:35,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:19:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:19:35,366 INFO L87 Difference]: Start difference. First operand 16047 states and 62011 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:43,286 INFO L93 Difference]: Finished difference Result 27127 states and 95126 transitions. [2021-04-15 05:19:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-04-15 05:19:43,287 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:43,345 INFO L225 Difference]: With dead ends: 27127 [2021-04-15 05:19:43,345 INFO L226 Difference]: Without dead ends: 27112 [2021-04-15 05:19:43,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 5011.3ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-04-15 05:19:43,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27112 states. [2021-04-15 05:19:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27112 to 17257. [2021-04-15 05:19:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17257 states, 17256 states have (on average 3.8067918405192396) internal successors, (65690), 17256 states have internal predecessors, (65690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17257 states to 17257 states and 65690 transitions. [2021-04-15 05:19:43,821 INFO L78 Accepts]: Start accepts. Automaton has 17257 states and 65690 transitions. Word has length 36 [2021-04-15 05:19:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:43,821 INFO L480 AbstractCegarLoop]: Abstraction has 17257 states and 65690 transitions. [2021-04-15 05:19:43,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17257 states and 65690 transitions. [2021-04-15 05:19:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:43,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:43,849 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:44,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:44,049 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 46 times [2021-04-15 05:19:44,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:44,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195657302] [2021-04-15 05:19:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195657302] [2021-04-15 05:19:44,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989687638] [2021-04-15 05:19:44,153 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 [2021-04-15 05:19:44,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:19:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:19:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:19:44,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:44,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-04-15 05:19:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222299341] [2021-04-15 05:19:44,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:19:44,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:44,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:19:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:19:44,493 INFO L87 Difference]: Start difference. First operand 17257 states and 65690 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:48,646 INFO L93 Difference]: Finished difference Result 32484 states and 115950 transitions. [2021-04-15 05:19:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-04-15 05:19:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:48,815 INFO L225 Difference]: With dead ends: 32484 [2021-04-15 05:19:48,815 INFO L226 Difference]: Without dead ends: 32480 [2021-04-15 05:19:48,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 2656.6ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-04-15 05:19:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32480 states. [2021-04-15 05:19:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32480 to 16350. [2021-04-15 05:19:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16350 states, 16349 states have (on average 3.8502049054988072) internal successors, (62947), 16349 states have internal predecessors, (62947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16350 states to 16350 states and 62947 transitions. [2021-04-15 05:19:49,232 INFO L78 Accepts]: Start accepts. Automaton has 16350 states and 62947 transitions. Word has length 36 [2021-04-15 05:19:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:49,232 INFO L480 AbstractCegarLoop]: Abstraction has 16350 states and 62947 transitions. [2021-04-15 05:19:49,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 16350 states and 62947 transitions. [2021-04-15 05:19:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:49,256 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:49,256 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:49,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:49,456 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:49,457 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 37 times [2021-04-15 05:19:49,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:49,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003754436] [2021-04-15 05:19:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:49,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003754436] [2021-04-15 05:19:49,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94412899] [2021-04-15 05:19:49,554 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 [2021-04-15 05:19:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:49,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:19:49,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:49,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:49,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-04-15 05:19:49,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137311229] [2021-04-15 05:19:49,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:19:49,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:49,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:19:49,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:19:49,863 INFO L87 Difference]: Start difference. First operand 16350 states and 62947 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:19:52,403 INFO L93 Difference]: Finished difference Result 33716 states and 119533 transitions. [2021-04-15 05:19:52,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-04-15 05:19:52,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:19:52,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:19:52,478 INFO L225 Difference]: With dead ends: 33716 [2021-04-15 05:19:52,478 INFO L226 Difference]: Without dead ends: 33716 [2021-04-15 05:19:52,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 1447.9ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 05:19:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33716 states. [2021-04-15 05:19:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33716 to 16474. [2021-04-15 05:19:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16474 states, 16473 states have (on average 3.843076549505251) internal successors, (63307), 16473 states have internal predecessors, (63307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16474 states to 16474 states and 63307 transitions. [2021-04-15 05:19:53,045 INFO L78 Accepts]: Start accepts. Automaton has 16474 states and 63307 transitions. Word has length 36 [2021-04-15 05:19:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:19:53,045 INFO L480 AbstractCegarLoop]: Abstraction has 16474 states and 63307 transitions. [2021-04-15 05:19:53,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 16474 states and 63307 transitions. [2021-04-15 05:19:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:19:53,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:19:53,073 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:19:53,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:19:53,274 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:19:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:19:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 38 times [2021-04-15 05:19:53,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:19:53,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368009475] [2021-04-15 05:19:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:19:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:19:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:19:53,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368009475] [2021-04-15 05:19:53,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741945307] [2021-04-15 05:19:53,361 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 [2021-04-15 05:19:53,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:19:53,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:19:53,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:19:53,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:19:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:19:53,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:19:53,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 05:19:53,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786486813] [2021-04-15 05:19:53,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:19:53,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:19:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:19:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:19:53,706 INFO L87 Difference]: Start difference. First operand 16474 states and 63307 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:19:54,470 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 05:20:00,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:00,496 INFO L93 Difference]: Finished difference Result 35669 states and 124553 transitions. [2021-04-15 05:20:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-04-15 05:20:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:00,576 INFO L225 Difference]: With dead ends: 35669 [2021-04-15 05:20:00,577 INFO L226 Difference]: Without dead ends: 35665 [2021-04-15 05:20:00,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12305 ImplicationChecksByTransitivity, 4701.0ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-04-15 05:20:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35665 states. [2021-04-15 05:20:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35665 to 16223. [2021-04-15 05:20:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16223 states, 16222 states have (on average 3.7955245962273456) internal successors, (61571), 16222 states have internal predecessors, (61571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16223 states to 16223 states and 61571 transitions. [2021-04-15 05:20:01,084 INFO L78 Accepts]: Start accepts. Automaton has 16223 states and 61571 transitions. Word has length 36 [2021-04-15 05:20:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:01,084 INFO L480 AbstractCegarLoop]: Abstraction has 16223 states and 61571 transitions. [2021-04-15 05:20:01,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 16223 states and 61571 transitions. [2021-04-15 05:20:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:01,266 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:01,267 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:01,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-04-15 05:20:01,484 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:01,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 47 times [2021-04-15 05:20:01,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:01,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078552009] [2021-04-15 05:20:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:20:01,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078552009] [2021-04-15 05:20:01,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366804166] [2021-04-15 05:20:01,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:01,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:20:01,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:01,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:20:01,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:01,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:01,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 05:20:01,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260225486] [2021-04-15 05:20:01,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:20:01,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:20:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:20:01,946 INFO L87 Difference]: Start difference. First operand 16223 states and 61571 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:04,389 INFO L93 Difference]: Finished difference Result 39169 states and 139488 transitions. [2021-04-15 05:20:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:20:04,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:04,502 INFO L225 Difference]: With dead ends: 39169 [2021-04-15 05:20:04,502 INFO L226 Difference]: Without dead ends: 39169 [2021-04-15 05:20:04,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1462.3ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:20:04,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39169 states. [2021-04-15 05:20:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39169 to 16800. [2021-04-15 05:20:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16800 states, 16799 states have (on average 3.824037145068159) internal successors, (64240), 16799 states have internal predecessors, (64240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16800 states to 16800 states and 64240 transitions. [2021-04-15 05:20:05,208 INFO L78 Accepts]: Start accepts. Automaton has 16800 states and 64240 transitions. Word has length 36 [2021-04-15 05:20:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:05,208 INFO L480 AbstractCegarLoop]: Abstraction has 16800 states and 64240 transitions. [2021-04-15 05:20:05,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 16800 states and 64240 transitions. [2021-04-15 05:20:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:05,239 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:05,239 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:05,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:05,439 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:05,440 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 48 times [2021-04-15 05:20:05,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:05,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072839258] [2021-04-15 05:20:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072839258] [2021-04-15 05:20:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166625085] [2021-04-15 05:20:05,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:05,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:20:05,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:05,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:20:05,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:05,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:05,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-04-15 05:20:05,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366666003] [2021-04-15 05:20:05,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:20:05,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:05,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:20:05,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:20:05,899 INFO L87 Difference]: Start difference. First operand 16800 states and 64240 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:07,700 INFO L93 Difference]: Finished difference Result 33519 states and 119130 transitions. [2021-04-15 05:20:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:20:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:07,778 INFO L225 Difference]: With dead ends: 33519 [2021-04-15 05:20:07,779 INFO L226 Difference]: Without dead ends: 33507 [2021-04-15 05:20:07,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 936.7ms TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 05:20:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33507 states. [2021-04-15 05:20:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33507 to 16806. [2021-04-15 05:20:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16806 states, 16805 states have (on average 3.823921451948825) internal successors, (64261), 16805 states have internal predecessors, (64261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16806 states to 16806 states and 64261 transitions. [2021-04-15 05:20:08,366 INFO L78 Accepts]: Start accepts. Automaton has 16806 states and 64261 transitions. Word has length 36 [2021-04-15 05:20:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:08,367 INFO L480 AbstractCegarLoop]: Abstraction has 16806 states and 64261 transitions. [2021-04-15 05:20:08,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 16806 states and 64261 transitions. [2021-04-15 05:20:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:08,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:08,393 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:08,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-04-15 05:20:08,594 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:08,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:08,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1105891854, now seen corresponding path program 49 times [2021-04-15 05:20:08,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:08,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920972432] [2021-04-15 05:20:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:08,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920972432] [2021-04-15 05:20:08,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965069569] [2021-04-15 05:20:08,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:20:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:09,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:09,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-04-15 05:20:09,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4734904] [2021-04-15 05:20:09,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:20:09,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:09,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:20:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:20:09,008 INFO L87 Difference]: Start difference. First operand 16806 states and 64261 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:10,893 INFO L93 Difference]: Finished difference Result 34560 states and 122013 transitions. [2021-04-15 05:20:10,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 05:20:10,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:11,153 INFO L225 Difference]: With dead ends: 34560 [2021-04-15 05:20:11,154 INFO L226 Difference]: Without dead ends: 34560 [2021-04-15 05:20:11,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 973.1ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:20:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34560 states. [2021-04-15 05:20:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34560 to 16446. [2021-04-15 05:20:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16446 states, 16445 states have (on average 3.80717543326239) internal successors, (62609), 16445 states have internal predecessors, (62609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16446 states to 16446 states and 62609 transitions. [2021-04-15 05:20:11,741 INFO L78 Accepts]: Start accepts. Automaton has 16446 states and 62609 transitions. Word has length 36 [2021-04-15 05:20:11,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:11,741 INFO L480 AbstractCegarLoop]: Abstraction has 16446 states and 62609 transitions. [2021-04-15 05:20:11,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 16446 states and 62609 transitions. [2021-04-15 05:20:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:11,767 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:11,767 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:11,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-04-15 05:20:11,968 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:11,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:11,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1690920040, now seen corresponding path program 50 times [2021-04-15 05:20:11,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:11,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844764288] [2021-04-15 05:20:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:12,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844764288] [2021-04-15 05:20:12,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475678033] [2021-04-15 05:20:12,068 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 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 [2021-04-15 05:20:12,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:20:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:20:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:20:12,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:12,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 05:20:12,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118075731] [2021-04-15 05:20:12,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:20:12,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:12,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:20:12,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:20:12,501 INFO L87 Difference]: Start difference. First operand 16446 states and 62609 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:20,015 INFO L93 Difference]: Finished difference Result 35901 states and 125560 transitions. [2021-04-15 05:20:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-04-15 05:20:20,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:20,092 INFO L225 Difference]: With dead ends: 35901 [2021-04-15 05:20:20,092 INFO L226 Difference]: Without dead ends: 35861 [2021-04-15 05:20:20,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12071 ImplicationChecksByTransitivity, 5360.2ms TimeCoverageRelationStatistics Valid=4498, Invalid=24914, Unknown=0, NotChecked=0, Total=29412 [2021-04-15 05:20:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35861 states. [2021-04-15 05:20:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35861 to 16426. [2021-04-15 05:20:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16426 states, 16425 states have (on average 3.805601217656012) internal successors, (62507), 16425 states have internal predecessors, (62507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16426 states to 16426 states and 62507 transitions. [2021-04-15 05:20:20,652 INFO L78 Accepts]: Start accepts. Automaton has 16426 states and 62507 transitions. Word has length 36 [2021-04-15 05:20:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:20,652 INFO L480 AbstractCegarLoop]: Abstraction has 16426 states and 62507 transitions. [2021-04-15 05:20:20,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 16426 states and 62507 transitions. [2021-04-15 05:20:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:20,678 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:20,678 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:20,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:20,879 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:20,879 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 51 times [2021-04-15 05:20:20,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:20,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495664837] [2021-04-15 05:20:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:20,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495664837] [2021-04-15 05:20:20,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646209810] [2021-04-15 05:20:20,994 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 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 [2021-04-15 05:20:21,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:20:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:21,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:20:21,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:21,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:21,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-04-15 05:20:21,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565072092] [2021-04-15 05:20:21,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:20:21,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:20:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:20:21,393 INFO L87 Difference]: Start difference. First operand 16426 states and 62507 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:24,569 INFO L93 Difference]: Finished difference Result 35186 states and 123603 transitions. [2021-04-15 05:20:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-04-15 05:20:24,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:24,653 INFO L225 Difference]: With dead ends: 35186 [2021-04-15 05:20:24,653 INFO L226 Difference]: Without dead ends: 35186 [2021-04-15 05:20:24,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 1950.3ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 05:20:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35186 states. [2021-04-15 05:20:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35186 to 16534. [2021-04-15 05:20:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16534 states, 16533 states have (on average 3.8008225972297827) internal successors, (62839), 16533 states have internal predecessors, (62839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16534 states to 16534 states and 62839 transitions. [2021-04-15 05:20:25,271 INFO L78 Accepts]: Start accepts. Automaton has 16534 states and 62839 transitions. Word has length 36 [2021-04-15 05:20:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:25,272 INFO L480 AbstractCegarLoop]: Abstraction has 16534 states and 62839 transitions. [2021-04-15 05:20:25,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 16534 states and 62839 transitions. [2021-04-15 05:20:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:25,299 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:25,299 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:25,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:25,499 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 52 times [2021-04-15 05:20:25,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:25,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445395486] [2021-04-15 05:20:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:25,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445395486] [2021-04-15 05:20:25,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597287110] [2021-04-15 05:20:25,650 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 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 [2021-04-15 05:20:25,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:20:25,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:20:25,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:26,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:20:26,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:26,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 05:20:26,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978849693] [2021-04-15 05:20:26,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:20:26,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:26,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:20:26,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:20:26,127 INFO L87 Difference]: Start difference. First operand 16534 states and 62839 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:31,761 INFO L93 Difference]: Finished difference Result 35120 states and 123162 transitions. [2021-04-15 05:20:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-04-15 05:20:31,763 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:31,834 INFO L225 Difference]: With dead ends: 35120 [2021-04-15 05:20:31,834 INFO L226 Difference]: Without dead ends: 35112 [2021-04-15 05:20:31,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 3353.8ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-04-15 05:20:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35112 states. [2021-04-15 05:20:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35112 to 16182. [2021-04-15 05:20:32,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16182 states, 16181 states have (on average 3.788950003090044) internal successors, (61309), 16181 states have internal predecessors, (61309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16182 states to 16182 states and 61309 transitions. [2021-04-15 05:20:32,315 INFO L78 Accepts]: Start accepts. Automaton has 16182 states and 61309 transitions. Word has length 36 [2021-04-15 05:20:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:32,315 INFO L480 AbstractCegarLoop]: Abstraction has 16182 states and 61309 transitions. [2021-04-15 05:20:32,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16182 states and 61309 transitions. [2021-04-15 05:20:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:32,340 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:32,340 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:32,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:32,540 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 53 times [2021-04-15 05:20:32,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:32,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544652303] [2021-04-15 05:20:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:32,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544652303] [2021-04-15 05:20:32,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553068048] [2021-04-15 05:20:32,666 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 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 [2021-04-15 05:20:32,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 05:20:32,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:32,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:20:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:33,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:33,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-04-15 05:20:33,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44380751] [2021-04-15 05:20:33,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:20:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:20:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:20:33,069 INFO L87 Difference]: Start difference. First operand 16182 states and 61309 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:33,831 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-04-15 05:20:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:37,070 INFO L93 Difference]: Finished difference Result 31424 states and 110398 transitions. [2021-04-15 05:20:37,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-04-15 05:20:37,072 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:37,136 INFO L225 Difference]: With dead ends: 31424 [2021-04-15 05:20:37,136 INFO L226 Difference]: Without dead ends: 31372 [2021-04-15 05:20:37,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 2509.0ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-04-15 05:20:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31372 states. [2021-04-15 05:20:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31372 to 17011. [2021-04-15 05:20:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17011 states, 17010 states have (on average 3.7483245149911815) internal successors, (63759), 17010 states have internal predecessors, (63759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17011 states to 17011 states and 63759 transitions. [2021-04-15 05:20:37,615 INFO L78 Accepts]: Start accepts. Automaton has 17011 states and 63759 transitions. Word has length 36 [2021-04-15 05:20:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:37,615 INFO L480 AbstractCegarLoop]: Abstraction has 17011 states and 63759 transitions. [2021-04-15 05:20:37,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 17011 states and 63759 transitions. [2021-04-15 05:20:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:37,640 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:37,640 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:37,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-04-15 05:20:37,841 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:37,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 54 times [2021-04-15 05:20:37,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:37,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28467829] [2021-04-15 05:20:37,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:37,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28467829] [2021-04-15 05:20:37,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85063604] [2021-04-15 05:20:37,986 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 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 [2021-04-15 05:20:38,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 05:20:38,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 05:20:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:38,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:20:38,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:38,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:38,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:20:38,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-04-15 05:20:38,465 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:20:38,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:20:38,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:38,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:38,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:20:38,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:39 [2021-04-15 05:20:38,634 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-04-15 05:20:38,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-04-15 05:20:38,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:38,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:38,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:20:38,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:50 [2021-04-15 05:20:38,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:20:38,888 INFO L354 Elim1Store]: treesize reduction 60, result has 15.5 percent of original size [2021-04-15 05:20:38,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-04-15 05:20:38,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:20:38,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:20:38,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:20:38,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:65 [2021-04-15 05:20:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 05:20:39,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:39,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 24 [2021-04-15 05:20:39,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340849] [2021-04-15 05:20:39,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:20:39,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:20:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:20:39,416 INFO L87 Difference]: Start difference. First operand 17011 states and 63759 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:45,923 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-04-15 05:20:49,144 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-04-15 05:20:49,726 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-04-15 05:20:50,080 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-04-15 05:20:50,681 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-04-15 05:20:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:51,182 INFO L93 Difference]: Finished difference Result 26494 states and 92613 transitions. [2021-04-15 05:20:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-04-15 05:20:51,184 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:51,235 INFO L225 Difference]: With dead ends: 26494 [2021-04-15 05:20:51,236 INFO L226 Difference]: Without dead ends: 26358 [2021-04-15 05:20:51,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5946 ImplicationChecksByTransitivity, 8295.7ms TimeCoverageRelationStatistics Valid=2000, Invalid=14256, Unknown=0, NotChecked=0, Total=16256 [2021-04-15 05:20:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26358 states. [2021-04-15 05:20:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26358 to 17294. [2021-04-15 05:20:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17294 states, 17293 states have (on average 3.735442086393338) internal successors, (64597), 17293 states have internal predecessors, (64597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17294 states to 17294 states and 64597 transitions. [2021-04-15 05:20:51,653 INFO L78 Accepts]: Start accepts. Automaton has 17294 states and 64597 transitions. Word has length 36 [2021-04-15 05:20:51,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:51,653 INFO L480 AbstractCegarLoop]: Abstraction has 17294 states and 64597 transitions. [2021-04-15 05:20:51,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 17294 states and 64597 transitions. [2021-04-15 05:20:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:51,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:51,679 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:51,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:20:51,891 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 55 times [2021-04-15 05:20:51,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:51,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237182769] [2021-04-15 05:20:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:52,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237182769] [2021-04-15 05:20:52,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485656791] [2021-04-15 05:20:52,009 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 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 [2021-04-15 05:20:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:20:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:20:52,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:52,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-04-15 05:20:52,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452874962] [2021-04-15 05:20:52,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:20:52,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:20:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:20:52,422 INFO L87 Difference]: Start difference. First operand 17294 states and 64597 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:20:56,752 INFO L93 Difference]: Finished difference Result 32283 states and 115167 transitions. [2021-04-15 05:20:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-04-15 05:20:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:20:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:20:56,822 INFO L225 Difference]: With dead ends: 32283 [2021-04-15 05:20:56,822 INFO L226 Difference]: Without dead ends: 32267 [2021-04-15 05:20:56,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 2865.5ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-04-15 05:20:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32267 states. [2021-04-15 05:20:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32267 to 17372. [2021-04-15 05:20:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17372 states, 17371 states have (on average 3.7320822059754764) internal successors, (64830), 17371 states have internal predecessors, (64830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17372 states to 17372 states and 64830 transitions. [2021-04-15 05:20:57,352 INFO L78 Accepts]: Start accepts. Automaton has 17372 states and 64830 transitions. Word has length 36 [2021-04-15 05:20:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:20:57,352 INFO L480 AbstractCegarLoop]: Abstraction has 17372 states and 64830 transitions. [2021-04-15 05:20:57,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:20:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 17372 states and 64830 transitions. [2021-04-15 05:20:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:20:57,379 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:20:57,380 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:20:57,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-04-15 05:20:57,581 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:20:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:20:57,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 39 times [2021-04-15 05:20:57,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:20:57,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394833958] [2021-04-15 05:20:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:20:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:20:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:20:57,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394833958] [2021-04-15 05:20:57,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345669221] [2021-04-15 05:20:57,692 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 [2021-04-15 05:20:57,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:20:57,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:20:57,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:20:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:20:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:20:58,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:20:58,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-04-15 05:20:58,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558272824] [2021-04-15 05:20:58,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:20:58,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:20:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:20:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:20:58,147 INFO L87 Difference]: Start difference. First operand 17372 states and 64830 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2021-04-15 05:21:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:02,234 INFO L93 Difference]: Finished difference Result 32268 states and 114944 transitions. [2021-04-15 05:21:02,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-04-15 05:21:02,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-04-15 05:21:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:02,302 INFO L225 Difference]: With dead ends: 32268 [2021-04-15 05:21:02,302 INFO L226 Difference]: Without dead ends: 32240 [2021-04-15 05:21:02,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 2721.8ms TimeCoverageRelationStatistics Valid=2122, Invalid=9220, Unknown=0, NotChecked=0, Total=11342 [2021-04-15 05:21:02,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32240 states. [2021-04-15 05:21:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32240 to 17860. [2021-04-15 05:21:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17860 states, 17859 states have (on average 3.705694607760793) internal successors, (66180), 17859 states have internal predecessors, (66180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:02,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17860 states to 17860 states and 66180 transitions. [2021-04-15 05:21:02,802 INFO L78 Accepts]: Start accepts. Automaton has 17860 states and 66180 transitions. Word has length 36 [2021-04-15 05:21:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:02,802 INFO L480 AbstractCegarLoop]: Abstraction has 17860 states and 66180 transitions. [2021-04-15 05:21:02,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2021-04-15 05:21:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 17860 states and 66180 transitions. [2021-04-15 05:21:02,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:02,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:02,830 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:03,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:03,052 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash -501007420, now seen corresponding path program 40 times [2021-04-15 05:21:03,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:03,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626587211] [2021-04-15 05:21:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:21:03,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626587211] [2021-04-15 05:21:03,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676511748] [2021-04-15 05:21:03,155 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 [2021-04-15 05:21:03,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:21:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:03,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:21:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:03,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:03,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-04-15 05:21:03,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336714068] [2021-04-15 05:21:03,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:21:03,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:21:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:21:03,547 INFO L87 Difference]: Start difference. First operand 17860 states and 66180 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2021-04-15 05:21:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:06,086 INFO L93 Difference]: Finished difference Result 31675 states and 112625 transitions. [2021-04-15 05:21:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 05:21:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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 36 [2021-04-15 05:21:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:06,153 INFO L225 Difference]: With dead ends: 31675 [2021-04-15 05:21:06,154 INFO L226 Difference]: Without dead ends: 31675 [2021-04-15 05:21:06,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1400.1ms TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 05:21:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31675 states. [2021-04-15 05:21:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31675 to 17736. [2021-04-15 05:21:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17736 states, 17735 states have (on average 3.711192557090499) internal successors, (65818), 17735 states have internal predecessors, (65818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17736 states to 17736 states and 65818 transitions. [2021-04-15 05:21:06,577 INFO L78 Accepts]: Start accepts. Automaton has 17736 states and 65818 transitions. Word has length 36 [2021-04-15 05:21:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:06,577 INFO L480 AbstractCegarLoop]: Abstraction has 17736 states and 65818 transitions. [2021-04-15 05:21:06,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2021-04-15 05:21:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 17736 states and 65818 transitions. [2021-04-15 05:21:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:06,749 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:06,750 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:06,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:06,950 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:06,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:06,951 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 56 times [2021-04-15 05:21:06,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:06,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654221776] [2021-04-15 05:21:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:07,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654221776] [2021-04-15 05:21:07,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383014403] [2021-04-15 05:21:07,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:07,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:21:07,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:21:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:21:07,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:07,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-04-15 05:21:07,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782435268] [2021-04-15 05:21:07,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:21:07,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:21:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:21:07,494 INFO L87 Difference]: Start difference. First operand 17736 states and 65818 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:13,531 INFO L93 Difference]: Finished difference Result 37470 states and 128076 transitions. [2021-04-15 05:21:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-04-15 05:21:13,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:21:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:13,608 INFO L225 Difference]: With dead ends: 37470 [2021-04-15 05:21:13,608 INFO L226 Difference]: Without dead ends: 37470 [2021-04-15 05:21:13,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7845 ImplicationChecksByTransitivity, 4242.0ms TimeCoverageRelationStatistics Valid=3923, Invalid=15259, Unknown=0, NotChecked=0, Total=19182 [2021-04-15 05:21:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37470 states. [2021-04-15 05:21:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37470 to 17361. [2021-04-15 05:21:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17361 states, 17360 states have (on average 3.7517857142857145) internal successors, (65131), 17360 states have internal predecessors, (65131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17361 states to 17361 states and 65131 transitions. [2021-04-15 05:21:14,142 INFO L78 Accepts]: Start accepts. Automaton has 17361 states and 65131 transitions. Word has length 36 [2021-04-15 05:21:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:14,142 INFO L480 AbstractCegarLoop]: Abstraction has 17361 states and 65131 transitions. [2021-04-15 05:21:14,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17361 states and 65131 transitions. [2021-04-15 05:21:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:14,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:14,168 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:14,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-04-15 05:21:14,368 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 57 times [2021-04-15 05:21:14,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:14,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853397959] [2021-04-15 05:21:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853397959] [2021-04-15 05:21:14,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274768025] [2021-04-15 05:21:14,500 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:14,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 05:21:14,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:21:14,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:14,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:14,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-04-15 05:21:14,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231906323] [2021-04-15 05:21:14,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:21:14,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:14,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:21:14,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:21:14,899 INFO L87 Difference]: Start difference. First operand 17361 states and 65131 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:19,385 INFO L93 Difference]: Finished difference Result 34675 states and 119928 transitions. [2021-04-15 05:21:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-04-15 05:21:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:21:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:19,456 INFO L225 Difference]: With dead ends: 34675 [2021-04-15 05:21:19,457 INFO L226 Difference]: Without dead ends: 34599 [2021-04-15 05:21:19,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4225 ImplicationChecksByTransitivity, 2974.2ms TimeCoverageRelationStatistics Valid=2296, Invalid=8834, Unknown=0, NotChecked=0, Total=11130 [2021-04-15 05:21:19,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34599 states. [2021-04-15 05:21:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34599 to 16908. [2021-04-15 05:21:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16908 states, 16907 states have (on average 3.7340746436387295) internal successors, (63132), 16907 states have internal predecessors, (63132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 63132 transitions. [2021-04-15 05:21:19,990 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 63132 transitions. Word has length 36 [2021-04-15 05:21:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:19,990 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 63132 transitions. [2021-04-15 05:21:19,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 63132 transitions. [2021-04-15 05:21:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:20,015 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:20,015 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:20,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:20,216 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:20,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:20,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 58 times [2021-04-15 05:21:20,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:20,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453942149] [2021-04-15 05:21:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:20,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453942149] [2021-04-15 05:21:20,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314029148] [2021-04-15 05:21:20,349 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:20,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:21:20,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:20,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:21:20,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:21:20,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:20,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:21:20,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309056588] [2021-04-15 05:21:20,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:21:20,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:21:20,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:21:20,698 INFO L87 Difference]: Start difference. First operand 16908 states and 63132 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:24,522 INFO L93 Difference]: Finished difference Result 31762 states and 110839 transitions. [2021-04-15 05:21:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 05:21:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:21:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:24,590 INFO L225 Difference]: With dead ends: 31762 [2021-04-15 05:21:24,591 INFO L226 Difference]: Without dead ends: 31690 [2021-04-15 05:21:24,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 2209.2ms TimeCoverageRelationStatistics Valid=1504, Invalid=5978, Unknown=0, NotChecked=0, Total=7482 [2021-04-15 05:21:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31690 states. [2021-04-15 05:21:24,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31690 to 16908. [2021-04-15 05:21:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16908 states, 16907 states have (on average 3.7340746436387295) internal successors, (63132), 16907 states have internal predecessors, (63132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16908 states to 16908 states and 63132 transitions. [2021-04-15 05:21:25,029 INFO L78 Accepts]: Start accepts. Automaton has 16908 states and 63132 transitions. Word has length 36 [2021-04-15 05:21:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:25,029 INFO L480 AbstractCegarLoop]: Abstraction has 16908 states and 63132 transitions. [2021-04-15 05:21:25,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 16908 states and 63132 transitions. [2021-04-15 05:21:25,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:25,054 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:25,054 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:25,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:25,255 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:25,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 59 times [2021-04-15 05:21:25,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:25,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563275566] [2021-04-15 05:21:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:25,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563275566] [2021-04-15 05:21:25,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581933458] [2021-04-15 05:21:25,412 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:25,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 05:21:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:21:25,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:21:25,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:25,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-04-15 05:21:25,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68040818] [2021-04-15 05:21:25,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:21:25,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:25,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:21:25,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:21:25,818 INFO L87 Difference]: Start difference. First operand 16908 states and 63132 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:33,658 INFO L93 Difference]: Finished difference Result 37416 states and 126890 transitions. [2021-04-15 05:21:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-04-15 05:21:33,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:21:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:33,734 INFO L225 Difference]: With dead ends: 37416 [2021-04-15 05:21:33,734 INFO L226 Difference]: Without dead ends: 37344 [2021-04-15 05:21:33,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11555 ImplicationChecksByTransitivity, 5586.4ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-04-15 05:21:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37344 states. [2021-04-15 05:21:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37344 to 16945. [2021-04-15 05:21:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16945 states, 16944 states have (on average 3.7370160528800755) internal successors, (63320), 16944 states have internal predecessors, (63320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16945 states to 16945 states and 63320 transitions. [2021-04-15 05:21:34,227 INFO L78 Accepts]: Start accepts. Automaton has 16945 states and 63320 transitions. Word has length 36 [2021-04-15 05:21:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:34,227 INFO L480 AbstractCegarLoop]: Abstraction has 16945 states and 63320 transitions. [2021-04-15 05:21:34,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16945 states and 63320 transitions. [2021-04-15 05:21:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:34,252 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:34,252 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:34,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 05:21:34,452 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:34,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 60 times [2021-04-15 05:21:34,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:34,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724314055] [2021-04-15 05:21:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:34,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724314055] [2021-04-15 05:21:34,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109665767] [2021-04-15 05:21:34,632 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:34,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 05:21:34,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:34,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 05:21:34,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:35,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-04-15 05:21:35,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:35,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:35,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:21:35,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-04-15 05:21:35,257 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-04-15 05:21:35,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-04-15 05:21:35,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:35,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:35,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 05:21:35,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-04-15 05:21:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 05:21:35,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-04-15 05:21:35,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:21:35,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:21:35,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:21:35,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-04-15 05:21:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:21:35,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:35,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-04-15 05:21:35,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676984859] [2021-04-15 05:21:35,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 05:21:35,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 05:21:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-04-15 05:21:35,739 INFO L87 Difference]: Start difference. First operand 16945 states and 63320 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:36,430 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 05:21:43,748 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-04-15 05:21:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:46,920 INFO L93 Difference]: Finished difference Result 33786 states and 113936 transitions. [2021-04-15 05:21:46,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-04-15 05:21:46,923 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:21:46,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:46,986 INFO L225 Difference]: With dead ends: 33786 [2021-04-15 05:21:46,986 INFO L226 Difference]: Without dead ends: 33559 [2021-04-15 05:21:46,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13670 ImplicationChecksByTransitivity, 8866.8ms TimeCoverageRelationStatistics Valid=4013, Invalid=29293, Unknown=0, NotChecked=0, Total=33306 [2021-04-15 05:21:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33559 states. [2021-04-15 05:21:47,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33559 to 17006. [2021-04-15 05:21:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17006 states, 17005 states have (on average 3.7364892678623933) internal successors, (63539), 17005 states have internal predecessors, (63539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17006 states to 17006 states and 63539 transitions. [2021-04-15 05:21:47,441 INFO L78 Accepts]: Start accepts. Automaton has 17006 states and 63539 transitions. Word has length 36 [2021-04-15 05:21:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:47,441 INFO L480 AbstractCegarLoop]: Abstraction has 17006 states and 63539 transitions. [2021-04-15 05:21:47,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 17006 states and 63539 transitions. [2021-04-15 05:21:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:47,466 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:47,466 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:47,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-04-15 05:21:47,666 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:47,667 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 61 times [2021-04-15 05:21:47,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:47,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733538035] [2021-04-15 05:21:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:47,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733538035] [2021-04-15 05:21:47,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850487835] [2021-04-15 05:21:47,922 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:47,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:21:47,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:21:48,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-04-15 05:21:48,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41252967] [2021-04-15 05:21:48,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:21:48,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:21:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:21:48,290 INFO L87 Difference]: Start difference. First operand 17006 states and 63539 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:53,561 INFO L93 Difference]: Finished difference Result 35615 states and 121342 transitions. [2021-04-15 05:21:53,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-04-15 05:21:53,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:21:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:53,633 INFO L225 Difference]: With dead ends: 35615 [2021-04-15 05:21:53,634 INFO L226 Difference]: Without dead ends: 35599 [2021-04-15 05:21:53,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5684 ImplicationChecksByTransitivity, 3515.8ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-04-15 05:21:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35599 states. [2021-04-15 05:21:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35599 to 14776. [2021-04-15 05:21:54,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14776 states, 14775 states have (on average 3.6406768189509306) internal successors, (53791), 14775 states have internal predecessors, (53791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14776 states to 14776 states and 53791 transitions. [2021-04-15 05:21:54,211 INFO L78 Accepts]: Start accepts. Automaton has 14776 states and 53791 transitions. Word has length 36 [2021-04-15 05:21:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:21:54,211 INFO L480 AbstractCegarLoop]: Abstraction has 14776 states and 53791 transitions. [2021-04-15 05:21:54,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14776 states and 53791 transitions. [2021-04-15 05:21:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:21:54,233 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:21:54,233 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:21:54,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 05:21:54,435 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:21:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:21:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 62 times [2021-04-15 05:21:54,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:21:54,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133772451] [2021-04-15 05:21:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:21:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:21:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:21:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133772451] [2021-04-15 05:21:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811812287] [2021-04-15 05:21:54,590 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:21:54,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:21:54,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:21:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:21:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:21:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:21:55,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:21:55,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-04-15 05:21:55,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145029159] [2021-04-15 05:21:55,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:21:55,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:21:55,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:21:55,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:21:55,058 INFO L87 Difference]: Start difference. First operand 14776 states and 53791 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:21:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:21:59,901 INFO L93 Difference]: Finished difference Result 28666 states and 99293 transitions. [2021-04-15 05:21:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-04-15 05:21:59,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:21:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:21:59,959 INFO L225 Difference]: With dead ends: 28666 [2021-04-15 05:21:59,959 INFO L226 Difference]: Without dead ends: 28606 [2021-04-15 05:21:59,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3397 ImplicationChecksByTransitivity, 2933.0ms TimeCoverageRelationStatistics Valid=1828, Invalid=7484, Unknown=0, NotChecked=0, Total=9312 [2021-04-15 05:21:59,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28606 states. [2021-04-15 05:22:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28606 to 15108. [2021-04-15 05:22:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15108 states, 15107 states have (on average 3.6251406632686836) internal successors, (54765), 15107 states have internal predecessors, (54765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15108 states to 15108 states and 54765 transitions. [2021-04-15 05:22:00,322 INFO L78 Accepts]: Start accepts. Automaton has 15108 states and 54765 transitions. Word has length 36 [2021-04-15 05:22:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:00,322 INFO L480 AbstractCegarLoop]: Abstraction has 15108 states and 54765 transitions. [2021-04-15 05:22:00,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 15108 states and 54765 transitions. [2021-04-15 05:22:00,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:00,345 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:00,345 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:00,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-15 05:22:00,545 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 63 times [2021-04-15 05:22:00,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:00,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728462960] [2021-04-15 05:22:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:22:00,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728462960] [2021-04-15 05:22:00,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996678058] [2021-04-15 05:22:00,687 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:00,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 05:22:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:22:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:22:01,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:01,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-04-15 05:22:01,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439227985] [2021-04-15 05:22:01,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:22:01,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:01,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:22:01,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:22:01,180 INFO L87 Difference]: Start difference. First operand 15108 states and 54765 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:04,572 INFO L93 Difference]: Finished difference Result 25993 states and 91048 transitions. [2021-04-15 05:22:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-04-15 05:22:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:22:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:04,639 INFO L225 Difference]: With dead ends: 25993 [2021-04-15 05:22:04,639 INFO L226 Difference]: Without dead ends: 25981 [2021-04-15 05:22:04,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 2161.1ms TimeCoverageRelationStatistics Valid=1112, Invalid=4588, Unknown=0, NotChecked=0, Total=5700 [2021-04-15 05:22:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25981 states. [2021-04-15 05:22:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25981 to 15395. [2021-04-15 05:22:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15395 states, 15394 states have (on average 3.624204235416396) internal successors, (55791), 15394 states have internal predecessors, (55791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15395 states to 15395 states and 55791 transitions. [2021-04-15 05:22:04,980 INFO L78 Accepts]: Start accepts. Automaton has 15395 states and 55791 transitions. Word has length 36 [2021-04-15 05:22:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:04,980 INFO L480 AbstractCegarLoop]: Abstraction has 15395 states and 55791 transitions. [2021-04-15 05:22:04,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 15395 states and 55791 transitions. [2021-04-15 05:22:05,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:05,003 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:05,003 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:05,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-04-15 05:22:05,203 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1215146028, now seen corresponding path program 64 times [2021-04-15 05:22:05,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:05,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306297410] [2021-04-15 05:22:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:05,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306297410] [2021-04-15 05:22:05,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701140571] [2021-04-15 05:22:05,363 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:05,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:22:05,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:05,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:22:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:22:05,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:05,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-04-15 05:22:05,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370563632] [2021-04-15 05:22:05,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:22:05,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:22:05,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:22:05,866 INFO L87 Difference]: Start difference. First operand 15395 states and 55791 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:09,383 INFO L93 Difference]: Finished difference Result 25873 states and 90773 transitions. [2021-04-15 05:22:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-04-15 05:22:09,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:22:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:09,437 INFO L225 Difference]: With dead ends: 25873 [2021-04-15 05:22:09,437 INFO L226 Difference]: Without dead ends: 25837 [2021-04-15 05:22:09,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2131 ImplicationChecksByTransitivity, 2287.2ms TimeCoverageRelationStatistics Valid=1218, Invalid=4944, Unknown=0, NotChecked=0, Total=6162 [2021-04-15 05:22:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25837 states. [2021-04-15 05:22:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25837 to 15395. [2021-04-15 05:22:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15395 states, 15394 states have (on average 3.623684552423022) internal successors, (55783), 15394 states have internal predecessors, (55783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15395 states to 15395 states and 55783 transitions. [2021-04-15 05:22:09,773 INFO L78 Accepts]: Start accepts. Automaton has 15395 states and 55783 transitions. Word has length 36 [2021-04-15 05:22:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:09,773 INFO L480 AbstractCegarLoop]: Abstraction has 15395 states and 55783 transitions. [2021-04-15 05:22:09,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 15395 states and 55783 transitions. [2021-04-15 05:22:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:09,795 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:09,795 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:09,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-04-15 05:22:09,995 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:09,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 853501382, now seen corresponding path program 65 times [2021-04-15 05:22:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:09,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762195712] [2021-04-15 05:22:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:22:10,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762195712] [2021-04-15 05:22:10,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828484040] [2021-04-15 05:22:10,120 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:10,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 05:22:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:22:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:22:10,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:10,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 05:22:10,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941502779] [2021-04-15 05:22:10,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:22:10,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:10,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:22:10,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:22:10,641 INFO L87 Difference]: Start difference. First operand 15395 states and 55783 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:16,810 INFO L93 Difference]: Finished difference Result 33384 states and 114382 transitions. [2021-04-15 05:22:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-04-15 05:22:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:22:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:16,877 INFO L225 Difference]: With dead ends: 33384 [2021-04-15 05:22:16,878 INFO L226 Difference]: Without dead ends: 33380 [2021-04-15 05:22:16,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4569 ImplicationChecksByTransitivity, 3965.6ms TimeCoverageRelationStatistics Valid=2345, Invalid=10087, Unknown=0, NotChecked=0, Total=12432 [2021-04-15 05:22:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33380 states. [2021-04-15 05:22:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33380 to 15788. [2021-04-15 05:22:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15788 states, 15787 states have (on average 3.6173433837967948) internal successors, (57107), 15787 states have internal predecessors, (57107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15788 states to 15788 states and 57107 transitions. [2021-04-15 05:22:17,290 INFO L78 Accepts]: Start accepts. Automaton has 15788 states and 57107 transitions. Word has length 36 [2021-04-15 05:22:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:17,290 INFO L480 AbstractCegarLoop]: Abstraction has 15788 states and 57107 transitions. [2021-04-15 05:22:17,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 15788 states and 57107 transitions. [2021-04-15 05:22:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:17,313 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:17,313 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:17,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-04-15 05:22:17,515 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:17,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 41 times [2021-04-15 05:22:17,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:17,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236734394] [2021-04-15 05:22:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:22:17,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236734394] [2021-04-15 05:22:17,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068946302] [2021-04-15 05:22:17,638 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:17,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 05:22:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:17,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:22:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:18,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:18,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-04-15 05:22:18,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253192642] [2021-04-15 05:22:18,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:22:18,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:18,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:22:18,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:22:18,184 INFO L87 Difference]: Start difference. First operand 15788 states and 57107 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:21,533 INFO L93 Difference]: Finished difference Result 36361 states and 126346 transitions. [2021-04-15 05:22:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 05:22:21,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:22:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:21,611 INFO L225 Difference]: With dead ends: 36361 [2021-04-15 05:22:21,611 INFO L226 Difference]: Without dead ends: 36361 [2021-04-15 05:22:21,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2033.0ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 05:22:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36361 states. [2021-04-15 05:22:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36361 to 16736. [2021-04-15 05:22:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16736 states, 16735 states have (on average 3.671765760382432) internal successors, (61447), 16735 states have internal predecessors, (61447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16736 states to 16736 states and 61447 transitions. [2021-04-15 05:22:22,115 INFO L78 Accepts]: Start accepts. Automaton has 16736 states and 61447 transitions. Word has length 36 [2021-04-15 05:22:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:22,116 INFO L480 AbstractCegarLoop]: Abstraction has 16736 states and 61447 transitions. [2021-04-15 05:22:22,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16736 states and 61447 transitions. [2021-04-15 05:22:22,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:22,139 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:22,139 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:22,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:22,340 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:22,340 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 42 times [2021-04-15 05:22:22,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:22,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372159239] [2021-04-15 05:22:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:22:22,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372159239] [2021-04-15 05:22:22,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325276159] [2021-04-15 05:22:22,475 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:22,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 05:22:22,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:22:22,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:23,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:23,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-04-15 05:22:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227669980] [2021-04-15 05:22:23,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:22:23,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:22:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:22:23,012 INFO L87 Difference]: Start difference. First operand 16736 states and 61447 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2021-04-15 05:22:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:26,015 INFO L93 Difference]: Finished difference Result 34371 states and 119658 transitions. [2021-04-15 05:22:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 05:22:26,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-04-15 05:22:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:26,087 INFO L225 Difference]: With dead ends: 34371 [2021-04-15 05:22:26,087 INFO L226 Difference]: Without dead ends: 34371 [2021-04-15 05:22:26,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1826.0ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:22:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34371 states. [2021-04-15 05:22:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34371 to 16748. [2021-04-15 05:22:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16748 states, 16747 states have (on average 3.6716426822714516) internal successors, (61489), 16747 states have internal predecessors, (61489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16748 states to 16748 states and 61489 transitions. [2021-04-15 05:22:26,640 INFO L78 Accepts]: Start accepts. Automaton has 16748 states and 61489 transitions. Word has length 36 [2021-04-15 05:22:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:26,640 INFO L480 AbstractCegarLoop]: Abstraction has 16748 states and 61489 transitions. [2021-04-15 05:22:26,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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) [2021-04-15 05:22:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 16748 states and 61489 transitions. [2021-04-15 05:22:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:26,664 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:26,664 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:26,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:26,865 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 43 times [2021-04-15 05:22:26,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:26,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839549283] [2021-04-15 05:22:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:22:26,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839549283] [2021-04-15 05:22:26,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583780912] [2021-04-15 05:22:26,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:27,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:22:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:22:27,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:27,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 05:22:27,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167516307] [2021-04-15 05:22:27,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:22:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:22:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:22:27,586 INFO L87 Difference]: Start difference. First operand 16748 states and 61489 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:35,243 INFO L93 Difference]: Finished difference Result 35272 states and 121644 transitions. [2021-04-15 05:22:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-04-15 05:22:35,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:22:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:35,318 INFO L225 Difference]: With dead ends: 35272 [2021-04-15 05:22:35,318 INFO L226 Difference]: Without dead ends: 35268 [2021-04-15 05:22:35,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6696 ImplicationChecksByTransitivity, 5277.2ms TimeCoverageRelationStatistics Valid=3278, Invalid=13752, Unknown=0, NotChecked=0, Total=17030 [2021-04-15 05:22:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35268 states. [2021-04-15 05:22:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35268 to 16857. [2021-04-15 05:22:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16857 states, 16856 states have (on average 3.670799715234931) internal successors, (61875), 16856 states have internal predecessors, (61875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16857 states to 16857 states and 61875 transitions. [2021-04-15 05:22:35,775 INFO L78 Accepts]: Start accepts. Automaton has 16857 states and 61875 transitions. Word has length 36 [2021-04-15 05:22:35,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:35,775 INFO L480 AbstractCegarLoop]: Abstraction has 16857 states and 61875 transitions. [2021-04-15 05:22:35,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 16857 states and 61875 transitions. [2021-04-15 05:22:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:35,800 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:35,800 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:36,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:36,000 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1470279356, now seen corresponding path program 44 times [2021-04-15 05:22:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:36,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794584066] [2021-04-15 05:22:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:36,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794584066] [2021-04-15 05:22:36,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159492340] [2021-04-15 05:22:36,153 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:22:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:36,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:22:36,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:22:36,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:36,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-04-15 05:22:36,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292831387] [2021-04-15 05:22:36,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:22:36,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:22:36,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:22:36,637 INFO L87 Difference]: Start difference. First operand 16857 states and 61875 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:41,699 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-04-15 05:22:42,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:42,473 INFO L93 Difference]: Finished difference Result 33707 states and 117783 transitions. [2021-04-15 05:22:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-04-15 05:22:42,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:22:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:42,544 INFO L225 Difference]: With dead ends: 33707 [2021-04-15 05:22:42,544 INFO L226 Difference]: Without dead ends: 33683 [2021-04-15 05:22:42,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4261 ImplicationChecksByTransitivity, 3917.7ms TimeCoverageRelationStatistics Valid=2404, Invalid=9152, Unknown=0, NotChecked=0, Total=11556 [2021-04-15 05:22:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33683 states. [2021-04-15 05:22:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33683 to 16813. [2021-04-15 05:22:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 16812 states have (on average 3.673507018796098) internal successors, (61759), 16812 states have internal predecessors, (61759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 61759 transitions. [2021-04-15 05:22:42,979 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 61759 transitions. Word has length 36 [2021-04-15 05:22:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:42,979 INFO L480 AbstractCegarLoop]: Abstraction has 16813 states and 61759 transitions. [2021-04-15 05:22:42,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:42,979 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 61759 transitions. [2021-04-15 05:22:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:43,003 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:43,003 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:43,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:43,204 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1021111212, now seen corresponding path program 45 times [2021-04-15 05:22:43,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:43,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368214025] [2021-04-15 05:22:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368214025] [2021-04-15 05:22:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298979976] [2021-04-15 05:22:43,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:43,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:22:43,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:43,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:22:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:43,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:43,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-04-15 05:22:43,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730184876] [2021-04-15 05:22:43,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:22:43,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:22:43,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:22:43,882 INFO L87 Difference]: Start difference. First operand 16813 states and 61759 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:46,817 INFO L93 Difference]: Finished difference Result 30377 states and 106733 transitions. [2021-04-15 05:22:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:22:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:22:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:46,881 INFO L225 Difference]: With dead ends: 30377 [2021-04-15 05:22:46,881 INFO L226 Difference]: Without dead ends: 30377 [2021-04-15 05:22:46,882 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1891.8ms TimeCoverageRelationStatistics Valid=984, Invalid=2798, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 05:22:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30377 states. [2021-04-15 05:22:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30377 to 17605. [2021-04-15 05:22:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17605 states, 17604 states have (on average 3.6770620313565097) internal successors, (64731), 17604 states have internal predecessors, (64731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17605 states to 17605 states and 64731 transitions. [2021-04-15 05:22:47,508 INFO L78 Accepts]: Start accepts. Automaton has 17605 states and 64731 transitions. Word has length 36 [2021-04-15 05:22:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:47,508 INFO L480 AbstractCegarLoop]: Abstraction has 17605 states and 64731 transitions. [2021-04-15 05:22:47,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 17605 states and 64731 transitions. [2021-04-15 05:22:47,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:47,532 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:47,532 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:47,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-04-15 05:22:47,733 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 46 times [2021-04-15 05:22:47,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:47,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834370809] [2021-04-15 05:22:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:22:47,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834370809] [2021-04-15 05:22:47,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326013554] [2021-04-15 05:22:47,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:47,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:22:47,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:22:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:22:48,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:48,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-04-15 05:22:48,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584535463] [2021-04-15 05:22:48,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:22:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:22:48,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:22:48,405 INFO L87 Difference]: Start difference. First operand 17605 states and 64731 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:22:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:22:53,450 INFO L93 Difference]: Finished difference Result 32211 states and 112550 transitions. [2021-04-15 05:22:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-04-15 05:22:53,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 36 [2021-04-15 05:22:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:22:53,518 INFO L225 Difference]: With dead ends: 32211 [2021-04-15 05:22:53,518 INFO L226 Difference]: Without dead ends: 32171 [2021-04-15 05:22:53,519 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 3342.3ms TimeCoverageRelationStatistics Valid=1956, Invalid=8346, Unknown=0, NotChecked=0, Total=10302 [2021-04-15 05:22:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32171 states. [2021-04-15 05:22:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32171 to 17837. [2021-04-15 05:22:53,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17837 states, 17836 states have (on average 3.665339762278538) internal successors, (65375), 17836 states have internal predecessors, (65375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:22:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17837 states to 17837 states and 65375 transitions. [2021-04-15 05:22:54,103 INFO L78 Accepts]: Start accepts. Automaton has 17837 states and 65375 transitions. Word has length 36 [2021-04-15 05:22:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:22:54,103 INFO L480 AbstractCegarLoop]: Abstraction has 17837 states and 65375 transitions. [2021-04-15 05:22:54,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:22:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17837 states and 65375 transitions. [2021-04-15 05:22:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:22:54,128 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:22:54,128 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:22:54,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 05:22:54,329 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:22:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:22:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 66 times [2021-04-15 05:22:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:22:54,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67576757] [2021-04-15 05:22:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:22:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:22:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:22:54,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67576757] [2021-04-15 05:22:54,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272322705] [2021-04-15 05:22:54,509 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:22:54,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:22:54,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:22:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:22:54,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:22:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:22:55,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:22:55,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:22:55,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979850878] [2021-04-15 05:22:55,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:22:55,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:22:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:22:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:22:55,086 INFO L87 Difference]: Start difference. First operand 17837 states and 65375 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:00,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:00,636 INFO L93 Difference]: Finished difference Result 32457 states and 112963 transitions. [2021-04-15 05:23:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-04-15 05:23:00,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:00,704 INFO L225 Difference]: With dead ends: 32457 [2021-04-15 05:23:00,704 INFO L226 Difference]: Without dead ends: 32457 [2021-04-15 05:23:00,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 3442.7ms TimeCoverageRelationStatistics Valid=2078, Invalid=6664, Unknown=0, NotChecked=0, Total=8742 [2021-04-15 05:23:00,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32457 states. [2021-04-15 05:23:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32457 to 17598. [2021-04-15 05:23:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17598 states, 17597 states have (on average 3.650792748763994) internal successors, (64243), 17597 states have internal predecessors, (64243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17598 states to 17598 states and 64243 transitions. [2021-04-15 05:23:01,241 INFO L78 Accepts]: Start accepts. Automaton has 17598 states and 64243 transitions. Word has length 36 [2021-04-15 05:23:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:01,242 INFO L480 AbstractCegarLoop]: Abstraction has 17598 states and 64243 transitions. [2021-04-15 05:23:01,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 17598 states and 64243 transitions. [2021-04-15 05:23:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:01,267 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:01,267 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:01,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-04-15 05:23:01,467 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 67 times [2021-04-15 05:23:01,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:01,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657476917] [2021-04-15 05:23:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:01,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657476917] [2021-04-15 05:23:01,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122684187] [2021-04-15 05:23:01,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:01,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:23:01,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:23:02,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:02,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-04-15 05:23:02,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865361882] [2021-04-15 05:23:02,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:23:02,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:23:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:23:02,124 INFO L87 Difference]: Start difference. First operand 17598 states and 64243 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-04-15 05:23:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:03,821 INFO L93 Difference]: Finished difference Result 30060 states and 105966 transitions. [2021-04-15 05:23:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 05:23:03,821 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 36 [2021-04-15 05:23:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:03,882 INFO L225 Difference]: With dead ends: 30060 [2021-04-15 05:23:03,883 INFO L226 Difference]: Without dead ends: 30060 [2021-04-15 05:23:03,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:23:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30060 states. [2021-04-15 05:23:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30060 to 17521. [2021-04-15 05:23:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17521 states, 17520 states have (on average 3.6473173515981734) internal successors, (63901), 17520 states have internal predecessors, (63901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17521 states to 17521 states and 63901 transitions. [2021-04-15 05:23:04,510 INFO L78 Accepts]: Start accepts. Automaton has 17521 states and 63901 transitions. Word has length 36 [2021-04-15 05:23:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:04,510 INFO L480 AbstractCegarLoop]: Abstraction has 17521 states and 63901 transitions. [2021-04-15 05:23:04,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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) [2021-04-15 05:23:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand 17521 states and 63901 transitions. [2021-04-15 05:23:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:04,539 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:04,539 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:04,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 05:23:04,740 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1497961976, now seen corresponding path program 68 times [2021-04-15 05:23:04,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:04,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105289725] [2021-04-15 05:23:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:04,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105289725] [2021-04-15 05:23:04,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321360049] [2021-04-15 05:23:04,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:04,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:23:04,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:23:04,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:23:05,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:05,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-04-15 05:23:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063462614] [2021-04-15 05:23:05,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:23:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:23:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:23:05,447 INFO L87 Difference]: Start difference. First operand 17521 states and 63901 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:07,846 INFO L93 Difference]: Finished difference Result 32427 states and 113320 transitions. [2021-04-15 05:23:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 05:23:07,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:07,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:07,915 INFO L225 Difference]: With dead ends: 32427 [2021-04-15 05:23:07,915 INFO L226 Difference]: Without dead ends: 32427 [2021-04-15 05:23:07,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1459.9ms TimeCoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 05:23:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32427 states. [2021-04-15 05:23:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32427 to 16968. [2021-04-15 05:23:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16968 states, 16967 states have (on average 3.6244474568279603) internal successors, (61496), 16967 states have internal predecessors, (61496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16968 states to 16968 states and 61496 transitions. [2021-04-15 05:23:08,400 INFO L78 Accepts]: Start accepts. Automaton has 16968 states and 61496 transitions. Word has length 36 [2021-04-15 05:23:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:08,400 INFO L480 AbstractCegarLoop]: Abstraction has 16968 states and 61496 transitions. [2021-04-15 05:23:08,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16968 states and 61496 transitions. [2021-04-15 05:23:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:08,423 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:08,424 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:08,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:08,624 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 69 times [2021-04-15 05:23:08,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:08,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001498536] [2021-04-15 05:23:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:08,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001498536] [2021-04-15 05:23:08,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058033619] [2021-04-15 05:23:08,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:08,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 05:23:08,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:23:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:23:09,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:09,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-04-15 05:23:09,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084164616] [2021-04-15 05:23:09,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:23:09,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:09,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:23:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:23:09,241 INFO L87 Difference]: Start difference. First operand 16968 states and 61496 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:10,824 INFO L93 Difference]: Finished difference Result 28758 states and 100390 transitions. [2021-04-15 05:23:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 05:23:10,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:10,883 INFO L225 Difference]: With dead ends: 28758 [2021-04-15 05:23:10,883 INFO L226 Difference]: Without dead ends: 28758 [2021-04-15 05:23:10,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 878.8ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 05:23:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28758 states. [2021-04-15 05:23:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28758 to 16976. [2021-04-15 05:23:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16976 states, 16975 states have (on average 3.6240353460972017) internal successors, (61518), 16975 states have internal predecessors, (61518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16976 states to 16976 states and 61518 transitions. [2021-04-15 05:23:11,430 INFO L78 Accepts]: Start accepts. Automaton has 16976 states and 61518 transitions. Word has length 36 [2021-04-15 05:23:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:11,430 INFO L480 AbstractCegarLoop]: Abstraction has 16976 states and 61518 transitions. [2021-04-15 05:23:11,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 16976 states and 61518 transitions. [2021-04-15 05:23:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:11,454 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:11,454 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:11,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 05:23:11,655 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:11,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 70 times [2021-04-15 05:23:11,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:11,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094529963] [2021-04-15 05:23:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:11,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094529963] [2021-04-15 05:23:11,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685248003] [2021-04-15 05:23:11,812 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:11,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:23:11,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:11,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:23:11,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:23:12,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:12,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-04-15 05:23:12,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113845414] [2021-04-15 05:23:12,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:23:12,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:12,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:23:12,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:23:12,301 INFO L87 Difference]: Start difference. First operand 16976 states and 61518 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:16,003 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 05:23:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:17,348 INFO L93 Difference]: Finished difference Result 30403 states and 103450 transitions. [2021-04-15 05:23:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-04-15 05:23:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:17,414 INFO L225 Difference]: With dead ends: 30403 [2021-04-15 05:23:17,415 INFO L226 Difference]: Without dead ends: 30395 [2021-04-15 05:23:17,415 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 3362.7ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 05:23:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30395 states. [2021-04-15 05:23:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30395 to 17056. [2021-04-15 05:23:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17056 states, 17055 states have (on average 3.6026385224274406) internal successors, (61443), 17055 states have internal predecessors, (61443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17056 states to 17056 states and 61443 transitions. [2021-04-15 05:23:17,890 INFO L78 Accepts]: Start accepts. Automaton has 17056 states and 61443 transitions. Word has length 36 [2021-04-15 05:23:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:17,890 INFO L480 AbstractCegarLoop]: Abstraction has 17056 states and 61443 transitions. [2021-04-15 05:23:17,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 17056 states and 61443 transitions. [2021-04-15 05:23:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:17,914 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:17,914 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:18,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:18,115 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:18,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:18,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 71 times [2021-04-15 05:23:18,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:18,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838215586] [2021-04-15 05:23:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:18,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838215586] [2021-04-15 05:23:18,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613528657] [2021-04-15 05:23:18,292 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:18,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:23:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:18,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:23:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 05:23:18,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:18,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2021-04-15 05:23:18,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587444045] [2021-04-15 05:23:18,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 05:23:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 05:23:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-04-15 05:23:18,705 INFO L87 Difference]: Start difference. First operand 17056 states and 61443 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:21,589 INFO L93 Difference]: Finished difference Result 30660 states and 104376 transitions. [2021-04-15 05:23:21,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-04-15 05:23:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:21,653 INFO L225 Difference]: With dead ends: 30660 [2021-04-15 05:23:21,654 INFO L226 Difference]: Without dead ends: 30628 [2021-04-15 05:23:21,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1932.2ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 05:23:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30628 states. [2021-04-15 05:23:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30628 to 17468. [2021-04-15 05:23:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17468 states, 17467 states have (on average 3.577488979217954) internal successors, (62488), 17467 states have internal predecessors, (62488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17468 states to 17468 states and 62488 transitions. [2021-04-15 05:23:22,169 INFO L78 Accepts]: Start accepts. Automaton has 17468 states and 62488 transitions. Word has length 36 [2021-04-15 05:23:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:22,170 INFO L480 AbstractCegarLoop]: Abstraction has 17468 states and 62488 transitions. [2021-04-15 05:23:22,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 17468 states and 62488 transitions. [2021-04-15 05:23:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:22,195 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:22,195 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:22,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 05:23:22,395 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 72 times [2021-04-15 05:23:22,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:22,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387358522] [2021-04-15 05:23:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:22,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387358522] [2021-04-15 05:23:22,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123633510] [2021-04-15 05:23:22,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:22,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:23:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:22,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:23:22,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:23:23,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:23,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:23:23,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501662569] [2021-04-15 05:23:23,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:23:23,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:23:23,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:23:23,071 INFO L87 Difference]: Start difference. First operand 17468 states and 62488 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:27,864 INFO L93 Difference]: Finished difference Result 34087 states and 113313 transitions. [2021-04-15 05:23:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-04-15 05:23:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:27,931 INFO L225 Difference]: With dead ends: 34087 [2021-04-15 05:23:27,931 INFO L226 Difference]: Without dead ends: 34087 [2021-04-15 05:23:27,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 3141.3ms TimeCoverageRelationStatistics Valid=1793, Invalid=6397, Unknown=0, NotChecked=0, Total=8190 [2021-04-15 05:23:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34087 states. [2021-04-15 05:23:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34087 to 17658. [2021-04-15 05:23:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17658 states, 17657 states have (on average 3.573596873761115) internal successors, (63099), 17657 states have internal predecessors, (63099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17658 states to 17658 states and 63099 transitions. [2021-04-15 05:23:28,449 INFO L78 Accepts]: Start accepts. Automaton has 17658 states and 63099 transitions. Word has length 36 [2021-04-15 05:23:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:28,449 INFO L480 AbstractCegarLoop]: Abstraction has 17658 states and 63099 transitions. [2021-04-15 05:23:28,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17658 states and 63099 transitions. [2021-04-15 05:23:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:28,473 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:28,474 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:28,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-04-15 05:23:28,674 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 73 times [2021-04-15 05:23:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:28,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402679285] [2021-04-15 05:23:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:28,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402679285] [2021-04-15 05:23:28,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170795247] [2021-04-15 05:23:28,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:23:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 05:23:29,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:29,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-04-15 05:23:29,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257535109] [2021-04-15 05:23:29,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:23:29,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:29,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:23:29,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:23:29,268 INFO L87 Difference]: Start difference. First operand 17658 states and 63099 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2021-04-15 05:23:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:32,553 INFO L93 Difference]: Finished difference Result 30440 states and 103806 transitions. [2021-04-15 05:23:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:23:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 36 [2021-04-15 05:23:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:32,757 INFO L225 Difference]: With dead ends: 30440 [2021-04-15 05:23:32,757 INFO L226 Difference]: Without dead ends: 30360 [2021-04-15 05:23:32,757 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 2084.9ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 05:23:32,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30360 states. [2021-04-15 05:23:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30360 to 16860. [2021-04-15 05:23:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16860 states, 16859 states have (on average 3.5827747790497657) internal successors, (60402), 16859 states have internal predecessors, (60402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16860 states to 16860 states and 60402 transitions. [2021-04-15 05:23:33,124 INFO L78 Accepts]: Start accepts. Automaton has 16860 states and 60402 transitions. Word has length 36 [2021-04-15 05:23:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:33,125 INFO L480 AbstractCegarLoop]: Abstraction has 16860 states and 60402 transitions. [2021-04-15 05:23:33,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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) [2021-04-15 05:23:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 16860 states and 60402 transitions. [2021-04-15 05:23:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:33,148 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:33,149 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:33,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:33,349 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 74 times [2021-04-15 05:23:33,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:33,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192205716] [2021-04-15 05:23:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:33,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192205716] [2021-04-15 05:23:33,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745001820] [2021-04-15 05:23:33,576 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:33,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:23:33,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:33,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:23:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:34,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:34,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-04-15 05:23:34,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225727517] [2021-04-15 05:23:34,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:23:34,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:23:34,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:23:34,043 INFO L87 Difference]: Start difference. First operand 16860 states and 60402 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:23:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:37,163 INFO L93 Difference]: Finished difference Result 29315 states and 98983 transitions. [2021-04-15 05:23:37,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-04-15 05:23:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 36 [2021-04-15 05:23:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:37,229 INFO L225 Difference]: With dead ends: 29315 [2021-04-15 05:23:37,229 INFO L226 Difference]: Without dead ends: 29315 [2021-04-15 05:23:37,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1966.0ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:23:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29315 states. [2021-04-15 05:23:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29315 to 17576. [2021-04-15 05:23:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17576 states, 17575 states have (on average 3.553570412517781) internal successors, (62454), 17575 states have internal predecessors, (62454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17576 states to 17576 states and 62454 transitions. [2021-04-15 05:23:37,711 INFO L78 Accepts]: Start accepts. Automaton has 17576 states and 62454 transitions. Word has length 36 [2021-04-15 05:23:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:37,711 INFO L480 AbstractCegarLoop]: Abstraction has 17576 states and 62454 transitions. [2021-04-15 05:23:37,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-04-15 05:23:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 17576 states and 62454 transitions. [2021-04-15 05:23:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:37,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:37,735 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:37,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:37,936 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:37,936 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 75 times [2021-04-15 05:23:37,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:37,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528135322] [2021-04-15 05:23:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:38,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528135322] [2021-04-15 05:23:38,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436737116] [2021-04-15 05:23:38,138 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:38,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:23:38,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:38,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:23:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:38,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:38,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-04-15 05:23:38,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552525956] [2021-04-15 05:23:38,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 05:23:38,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 05:23:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-04-15 05:23:38,551 INFO L87 Difference]: Start difference. First operand 17576 states and 62454 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-04-15 05:23:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:40,599 INFO L93 Difference]: Finished difference Result 28174 states and 96015 transitions. [2021-04-15 05:23:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 05:23:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 36 [2021-04-15 05:23:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:40,658 INFO L225 Difference]: With dead ends: 28174 [2021-04-15 05:23:40,658 INFO L226 Difference]: Without dead ends: 28158 [2021-04-15 05:23:40,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1305.6ms TimeCoverageRelationStatistics Valid=507, Invalid=1749, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:23:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28158 states. [2021-04-15 05:23:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28158 to 17442. [2021-04-15 05:23:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17442 states, 17441 states have (on average 3.558798234046213) internal successors, (62069), 17441 states have internal predecessors, (62069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17442 states to 17442 states and 62069 transitions. [2021-04-15 05:23:41,166 INFO L78 Accepts]: Start accepts. Automaton has 17442 states and 62069 transitions. Word has length 36 [2021-04-15 05:23:41,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:41,167 INFO L480 AbstractCegarLoop]: Abstraction has 17442 states and 62069 transitions. [2021-04-15 05:23:41,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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) [2021-04-15 05:23:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 17442 states and 62069 transitions. [2021-04-15 05:23:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:41,190 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:41,190 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:41,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-15 05:23:41,391 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:41,391 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 76 times [2021-04-15 05:23:41,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:41,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186311481] [2021-04-15 05:23:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:41,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186311481] [2021-04-15 05:23:41,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100736066] [2021-04-15 05:23:41,606 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:41,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:23:41,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:41,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:23:41,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:23:42,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:42,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 17 [2021-04-15 05:23:42,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100161060] [2021-04-15 05:23:42,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:23:42,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:42,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:23:42,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:23:42,030 INFO L87 Difference]: Start difference. First operand 17442 states and 62069 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:44,670 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-04-15 05:23:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:46,416 INFO L93 Difference]: Finished difference Result 30671 states and 103844 transitions. [2021-04-15 05:23:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-04-15 05:23:46,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:46,481 INFO L225 Difference]: With dead ends: 30671 [2021-04-15 05:23:46,481 INFO L226 Difference]: Without dead ends: 30591 [2021-04-15 05:23:46,482 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2845.5ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-04-15 05:23:46,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30591 states. [2021-04-15 05:23:46,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30591 to 17956. [2021-04-15 05:23:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17956 states, 17955 states have (on average 3.536396546922863) internal successors, (63496), 17955 states have internal predecessors, (63496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17956 states to 17956 states and 63496 transitions. [2021-04-15 05:23:46,996 INFO L78 Accepts]: Start accepts. Automaton has 17956 states and 63496 transitions. Word has length 36 [2021-04-15 05:23:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:46,996 INFO L480 AbstractCegarLoop]: Abstraction has 17956 states and 63496 transitions. [2021-04-15 05:23:46,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:46,996 INFO L276 IsEmpty]: Start isEmpty. Operand 17956 states and 63496 transitions. [2021-04-15 05:23:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:47,021 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:47,021 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:47,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:47,222 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 77 times [2021-04-15 05:23:47,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:47,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293057469] [2021-04-15 05:23:47,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:47,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293057469] [2021-04-15 05:23:47,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540080247] [2021-04-15 05:23:47,427 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:47,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 05:23:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:23:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:23:47,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:47,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-04-15 05:23:47,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222118300] [2021-04-15 05:23:47,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:23:47,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:47,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:23:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:23:47,897 INFO L87 Difference]: Start difference. First operand 17956 states and 63496 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:53,109 INFO L93 Difference]: Finished difference Result 33489 states and 111985 transitions. [2021-04-15 05:23:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-04-15 05:23:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:53,178 INFO L225 Difference]: With dead ends: 33489 [2021-04-15 05:23:53,178 INFO L226 Difference]: Without dead ends: 33489 [2021-04-15 05:23:53,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 3681.0ms TimeCoverageRelationStatistics Valid=1759, Invalid=7943, Unknown=0, NotChecked=0, Total=9702 [2021-04-15 05:23:53,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33489 states. [2021-04-15 05:23:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33489 to 18616. [2021-04-15 05:23:53,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18616 states, 18615 states have (on average 3.516089175396186) internal successors, (65452), 18615 states have internal predecessors, (65452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18616 states to 18616 states and 65452 transitions. [2021-04-15 05:23:53,624 INFO L78 Accepts]: Start accepts. Automaton has 18616 states and 65452 transitions. Word has length 36 [2021-04-15 05:23:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:53,624 INFO L480 AbstractCegarLoop]: Abstraction has 18616 states and 65452 transitions. [2021-04-15 05:23:53,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18616 states and 65452 transitions. [2021-04-15 05:23:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:53,649 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:53,649 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:53,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 05:23:53,850 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1727119096, now seen corresponding path program 78 times [2021-04-15 05:23:53,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:53,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338944691] [2021-04-15 05:23:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:54,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338944691] [2021-04-15 05:23:54,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868016990] [2021-04-15 05:23:54,091 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:54,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:23:54,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:23:54,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:23:54,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:23:54,260 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-04-15 05:23:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:54,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:23:54,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 05:23:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871929090] [2021-04-15 05:23:54,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:23:54,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:23:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:23:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:23:54,954 INFO L87 Difference]: Start difference. First operand 18616 states and 65452 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:58,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:23:58,556 INFO L93 Difference]: Finished difference Result 38028 states and 127193 transitions. [2021-04-15 05:23:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:23:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:23:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:23:58,631 INFO L225 Difference]: With dead ends: 38028 [2021-04-15 05:23:58,631 INFO L226 Difference]: Without dead ends: 38028 [2021-04-15 05:23:58,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2406.0ms TimeCoverageRelationStatistics Valid=751, Invalid=2441, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 05:23:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38028 states. [2021-04-15 05:23:59,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38028 to 20478. [2021-04-15 05:23:59,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20478 states, 20477 states have (on average 3.5023196757337502) internal successors, (71717), 20477 states have internal predecessors, (71717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20478 states to 20478 states and 71717 transitions. [2021-04-15 05:23:59,225 INFO L78 Accepts]: Start accepts. Automaton has 20478 states and 71717 transitions. Word has length 36 [2021-04-15 05:23:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:23:59,225 INFO L480 AbstractCegarLoop]: Abstraction has 20478 states and 71717 transitions. [2021-04-15 05:23:59,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:23:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 20478 states and 71717 transitions. [2021-04-15 05:23:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:23:59,253 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:23:59,253 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:23:59,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 05:23:59,454 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:23:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:23:59,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1512470806, now seen corresponding path program 79 times [2021-04-15 05:23:59,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:23:59,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983013608] [2021-04-15 05:23:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:23:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:23:59,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983013608] [2021-04-15 05:23:59,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54050663] [2021-04-15 05:23:59,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:23:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:23:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:23:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:24:00,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:00,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-04-15 05:24:00,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122110912] [2021-04-15 05:24:00,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:24:00,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:00,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:24:00,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:24:00,346 INFO L87 Difference]: Start difference. First operand 20478 states and 71717 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:12,691 INFO L93 Difference]: Finished difference Result 41593 states and 137151 transitions. [2021-04-15 05:24:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-04-15 05:24:12,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:24:12,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:12,772 INFO L225 Difference]: With dead ends: 41593 [2021-04-15 05:24:12,773 INFO L226 Difference]: Without dead ends: 41553 [2021-04-15 05:24:12,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13988 ImplicationChecksByTransitivity, 9528.3ms TimeCoverageRelationStatistics Valid=5552, Invalid=26668, Unknown=0, NotChecked=0, Total=32220 [2021-04-15 05:24:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41553 states. [2021-04-15 05:24:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41553 to 20092. [2021-04-15 05:24:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20092 states, 20091 states have (on average 3.490219501269225) internal successors, (70122), 20091 states have internal predecessors, (70122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20092 states to 20092 states and 70122 transitions. [2021-04-15 05:24:13,325 INFO L78 Accepts]: Start accepts. Automaton has 20092 states and 70122 transitions. Word has length 36 [2021-04-15 05:24:13,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:13,325 INFO L480 AbstractCegarLoop]: Abstraction has 20092 states and 70122 transitions. [2021-04-15 05:24:13,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:13,325 INFO L276 IsEmpty]: Start isEmpty. Operand 20092 states and 70122 transitions. [2021-04-15 05:24:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:24:13,353 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:13,353 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:24:13,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-04-15 05:24:13,570 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash 883177114, now seen corresponding path program 80 times [2021-04-15 05:24:13,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:13,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096296555] [2021-04-15 05:24:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:13,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096296555] [2021-04-15 05:24:13,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427720699] [2021-04-15 05:24:13,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:13,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:24:13,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:13,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:24:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:24:14,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:14,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-04-15 05:24:14,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104631932] [2021-04-15 05:24:14,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:24:14,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:14,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:24:14,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:24:14,624 INFO L87 Difference]: Start difference. First operand 20092 states and 70122 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:23,626 INFO L93 Difference]: Finished difference Result 39501 states and 130537 transitions. [2021-04-15 05:24:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-04-15 05:24:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:24:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:23,705 INFO L225 Difference]: With dead ends: 39501 [2021-04-15 05:24:23,706 INFO L226 Difference]: Without dead ends: 39385 [2021-04-15 05:24:23,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 6719.5ms TimeCoverageRelationStatistics Valid=3337, Invalid=13955, Unknown=0, NotChecked=0, Total=17292 [2021-04-15 05:24:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39385 states. [2021-04-15 05:24:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39385 to 20170. [2021-04-15 05:24:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20170 states, 20169 states have (on average 3.4880757598294414) internal successors, (70351), 20169 states have internal predecessors, (70351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20170 states to 20170 states and 70351 transitions. [2021-04-15 05:24:24,239 INFO L78 Accepts]: Start accepts. Automaton has 20170 states and 70351 transitions. Word has length 36 [2021-04-15 05:24:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:24,239 INFO L480 AbstractCegarLoop]: Abstraction has 20170 states and 70351 transitions. [2021-04-15 05:24:24,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20170 states and 70351 transitions. [2021-04-15 05:24:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:24:24,267 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:24,267 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:24:24,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:24,469 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash 246710260, now seen corresponding path program 81 times [2021-04-15 05:24:24,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:24,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254592847] [2021-04-15 05:24:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:24,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254592847] [2021-04-15 05:24:24,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378920533] [2021-04-15 05:24:24,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:24,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:24:24,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:24:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:25,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:25,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-04-15 05:24:25,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318610459] [2021-04-15 05:24:25,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:24:25,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:24:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:24:25,369 INFO L87 Difference]: Start difference. First operand 20170 states and 70351 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:24:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:33,572 INFO L93 Difference]: Finished difference Result 39351 states and 130477 transitions. [2021-04-15 05:24:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-04-15 05:24:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 36 [2021-04-15 05:24:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:33,652 INFO L225 Difference]: With dead ends: 39351 [2021-04-15 05:24:33,652 INFO L226 Difference]: Without dead ends: 39239 [2021-04-15 05:24:33,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5704 ImplicationChecksByTransitivity, 5802.9ms TimeCoverageRelationStatistics Valid=2492, Invalid=12028, Unknown=0, NotChecked=0, Total=14520 [2021-04-15 05:24:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39239 states. [2021-04-15 05:24:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39239 to 20262. [2021-04-15 05:24:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20262 states, 20261 states have (on average 3.4852672622279255) internal successors, (70615), 20261 states have internal predecessors, (70615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20262 states to 20262 states and 70615 transitions. [2021-04-15 05:24:34,262 INFO L78 Accepts]: Start accepts. Automaton has 20262 states and 70615 transitions. Word has length 36 [2021-04-15 05:24:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:34,262 INFO L480 AbstractCegarLoop]: Abstraction has 20262 states and 70615 transitions. [2021-04-15 05:24:34,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:24:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20262 states and 70615 transitions. [2021-04-15 05:24:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:24:34,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:34,289 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:24:34,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-04-15 05:24:34,491 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:34,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:34,491 INFO L82 PathProgramCache]: Analyzing trace with hash -36962824, now seen corresponding path program 82 times [2021-04-15 05:24:34,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:34,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539685565] [2021-04-15 05:24:34,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:34,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539685565] [2021-04-15 05:24:34,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178907592] [2021-04-15 05:24:34,765 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:34,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:24:34,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:34,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:24:34,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:24:35,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:35,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-04-15 05:24:35,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955600447] [2021-04-15 05:24:35,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:24:35,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:35,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:24:35,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:24:35,344 INFO L87 Difference]: Start difference. First operand 20262 states and 70615 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-04-15 05:24:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:42,774 INFO L93 Difference]: Finished difference Result 38055 states and 126516 transitions. [2021-04-15 05:24:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-04-15 05:24:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 36 [2021-04-15 05:24:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:42,852 INFO L225 Difference]: With dead ends: 38055 [2021-04-15 05:24:42,852 INFO L226 Difference]: Without dead ends: 37859 [2021-04-15 05:24:42,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 5282.9ms TimeCoverageRelationStatistics Valid=2108, Invalid=9664, Unknown=0, NotChecked=0, Total=11772 [2021-04-15 05:24:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37859 states. [2021-04-15 05:24:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37859 to 21405. [2021-04-15 05:24:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21405 states, 21404 states have (on average 3.48878714259017) internal successors, (74674), 21404 states have internal predecessors, (74674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21405 states to 21405 states and 74674 transitions. [2021-04-15 05:24:43,488 INFO L78 Accepts]: Start accepts. Automaton has 21405 states and 74674 transitions. Word has length 36 [2021-04-15 05:24:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:43,488 INFO L480 AbstractCegarLoop]: Abstraction has 21405 states and 74674 transitions. [2021-04-15 05:24:43,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-04-15 05:24:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 21405 states and 74674 transitions. [2021-04-15 05:24:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:24:43,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:43,517 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:24:43,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-04-15 05:24:43,717 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:43,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1567865864, now seen corresponding path program 83 times [2021-04-15 05:24:43,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:43,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677005114] [2021-04-15 05:24:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:24:43,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677005114] [2021-04-15 05:24:43,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243153324] [2021-04-15 05:24:43,887 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:43,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:24:43,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:24:43,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:44,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:44,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-04-15 05:24:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478486077] [2021-04-15 05:24:44,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:24:44,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:44,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:24:44,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:24:44,610 INFO L87 Difference]: Start difference. First operand 21405 states and 74674 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:46,911 INFO L93 Difference]: Finished difference Result 44305 states and 150424 transitions. [2021-04-15 05:24:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 05:24:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:24:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:47,004 INFO L225 Difference]: With dead ends: 44305 [2021-04-15 05:24:47,004 INFO L226 Difference]: Without dead ends: 44305 [2021-04-15 05:24:47,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1113.3ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 05:24:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44305 states. [2021-04-15 05:24:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44305 to 21985. [2021-04-15 05:24:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21985 states, 21984 states have (on average 3.5090065502183405) internal successors, (77142), 21984 states have internal predecessors, (77142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:47,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 77142 transitions. [2021-04-15 05:24:47,968 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 77142 transitions. Word has length 36 [2021-04-15 05:24:47,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:47,968 INFO L480 AbstractCegarLoop]: Abstraction has 21985 states and 77142 transitions. [2021-04-15 05:24:47,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:47,968 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 77142 transitions. [2021-04-15 05:24:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:24:47,998 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:47,998 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:24:48,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:48,198 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:48,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:48,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2045351476, now seen corresponding path program 84 times [2021-04-15 05:24:48,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:48,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975755448] [2021-04-15 05:24:48,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:48,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975755448] [2021-04-15 05:24:48,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982254878] [2021-04-15 05:24:48,426 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:48,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:24:48,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:24:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:24:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:24:49,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:49,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-04-15 05:24:49,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279732582] [2021-04-15 05:24:49,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:24:49,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:49,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:24:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:24:49,016 INFO L87 Difference]: Start difference. First operand 21985 states and 77142 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-04-15 05:24:55,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:55,508 INFO L93 Difference]: Finished difference Result 41550 states and 137477 transitions. [2021-04-15 05:24:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-04-15 05:24:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 36 [2021-04-15 05:24:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:24:55,585 INFO L225 Difference]: With dead ends: 41550 [2021-04-15 05:24:55,585 INFO L226 Difference]: Without dead ends: 41402 [2021-04-15 05:24:55,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 4376.8ms TimeCoverageRelationStatistics Valid=2115, Invalid=8805, Unknown=0, NotChecked=0, Total=10920 [2021-04-15 05:24:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41402 states. [2021-04-15 05:24:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41402 to 22283. [2021-04-15 05:24:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22283 states, 22282 states have (on average 3.4998204829009962) internal successors, (77983), 22282 states have internal predecessors, (77983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:24:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22283 states to 22283 states and 77983 transitions. [2021-04-15 05:24:56,198 INFO L78 Accepts]: Start accepts. Automaton has 22283 states and 77983 transitions. Word has length 36 [2021-04-15 05:24:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:24:56,198 INFO L480 AbstractCegarLoop]: Abstraction has 22283 states and 77983 transitions. [2021-04-15 05:24:56,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-04-15 05:24:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 22283 states and 77983 transitions. [2021-04-15 05:24:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:24:56,336 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:24:56,336 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:24:56,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:56,536 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:24:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:24:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1209334608, now seen corresponding path program 85 times [2021-04-15 05:24:56,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:24:56,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990491578] [2021-04-15 05:24:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:24:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:56,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990491578] [2021-04-15 05:24:56,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754890680] [2021-04-15 05:24:56,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:24:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:24:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:24:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:24:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:24:57,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:24:57,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-04-15 05:24:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196774972] [2021-04-15 05:24:57,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:24:57,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:24:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:24:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:24:57,303 INFO L87 Difference]: Start difference. First operand 22283 states and 77983 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:24:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:24:59,935 INFO L93 Difference]: Finished difference Result 39920 states and 132787 transitions. [2021-04-15 05:24:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:24:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 36 [2021-04-15 05:24:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:00,013 INFO L225 Difference]: With dead ends: 39920 [2021-04-15 05:25:00,014 INFO L226 Difference]: Without dead ends: 39920 [2021-04-15 05:25:00,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1556.6ms TimeCoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 05:25:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39920 states. [2021-04-15 05:25:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39920 to 22465. [2021-04-15 05:25:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22465 states, 22464 states have (on average 3.4959045584045585) internal successors, (78532), 22464 states have internal predecessors, (78532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22465 states to 22465 states and 78532 transitions. [2021-04-15 05:25:00,611 INFO L78 Accepts]: Start accepts. Automaton has 22465 states and 78532 transitions. Word has length 36 [2021-04-15 05:25:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:00,611 INFO L480 AbstractCegarLoop]: Abstraction has 22465 states and 78532 transitions. [2021-04-15 05:25:00,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:25:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 22465 states and 78532 transitions. [2021-04-15 05:25:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:00,639 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:00,639 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:00,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:00,840 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:00,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:00,840 INFO L82 PathProgramCache]: Analyzing trace with hash 18457400, now seen corresponding path program 86 times [2021-04-15 05:25:00,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:00,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948436387] [2021-04-15 05:25:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:01,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948436387] [2021-04-15 05:25:01,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833605512] [2021-04-15 05:25:01,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:01,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:25:01,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:25:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:25:01,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:25:01,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:01,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-04-15 05:25:01,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978855281] [2021-04-15 05:25:01,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:25:01,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:01,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:25:01,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:25:01,676 INFO L87 Difference]: Start difference. First operand 22465 states and 78532 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:25:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:09,769 INFO L93 Difference]: Finished difference Result 40540 states and 134969 transitions. [2021-04-15 05:25:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-04-15 05:25:09,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 36 [2021-04-15 05:25:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:09,855 INFO L225 Difference]: With dead ends: 40540 [2021-04-15 05:25:09,855 INFO L226 Difference]: Without dead ends: 40452 [2021-04-15 05:25:09,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5449 ImplicationChecksByTransitivity, 5720.6ms TimeCoverageRelationStatistics Valid=2596, Invalid=10976, Unknown=0, NotChecked=0, Total=13572 [2021-04-15 05:25:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-04-15 05:25:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 21926. [2021-04-15 05:25:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21926 states, 21925 states have (on average 3.5023033067274802) internal successors, (76788), 21925 states have internal predecessors, (76788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21926 states to 21926 states and 76788 transitions. [2021-04-15 05:25:10,489 INFO L78 Accepts]: Start accepts. Automaton has 21926 states and 76788 transitions. Word has length 36 [2021-04-15 05:25:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:10,489 INFO L480 AbstractCegarLoop]: Abstraction has 21926 states and 76788 transitions. [2021-04-15 05:25:10,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:25:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 21926 states and 76788 transitions. [2021-04-15 05:25:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:10,518 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:10,518 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:10,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 05:25:10,719 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1058738612, now seen corresponding path program 87 times [2021-04-15 05:25:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:10,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668876383] [2021-04-15 05:25:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:10,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668876383] [2021-04-15 05:25:10,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893844874] [2021-04-15 05:25:10,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:10,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:25:10,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:25:10,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:25:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:11,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:11,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-04-15 05:25:11,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798213121] [2021-04-15 05:25:11,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:25:11,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:11,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:25:11,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:25:11,568 INFO L87 Difference]: Start difference. First operand 21926 states and 76788 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:15,279 INFO L93 Difference]: Finished difference Result 36897 states and 124356 transitions. [2021-04-15 05:25:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:25:15,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:25:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:15,351 INFO L225 Difference]: With dead ends: 36897 [2021-04-15 05:25:15,351 INFO L226 Difference]: Without dead ends: 36897 [2021-04-15 05:25:15,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2213.9ms TimeCoverageRelationStatistics Valid=676, Invalid=2080, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 05:25:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36897 states. [2021-04-15 05:25:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36897 to 22142. [2021-04-15 05:25:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22142 states, 22141 states have (on average 3.4994806015988438) internal successors, (77482), 22141 states have internal predecessors, (77482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22142 states to 22142 states and 77482 transitions. [2021-04-15 05:25:16,120 INFO L78 Accepts]: Start accepts. Automaton has 22142 states and 77482 transitions. Word has length 36 [2021-04-15 05:25:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:16,120 INFO L480 AbstractCegarLoop]: Abstraction has 22142 states and 77482 transitions. [2021-04-15 05:25:16,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22142 states and 77482 transitions. [2021-04-15 05:25:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:16,150 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:16,150 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:16,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-04-15 05:25:16,350 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:16,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 88 times [2021-04-15 05:25:16,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:16,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276003266] [2021-04-15 05:25:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:16,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276003266] [2021-04-15 05:25:16,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158228150] [2021-04-15 05:25:16,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:16,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:25:16,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:25:16,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:25:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:25:17,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:17,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-04-15 05:25:17,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817830528] [2021-04-15 05:25:17,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:25:17,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:17,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:25:17,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:25:17,184 INFO L87 Difference]: Start difference. First operand 22142 states and 77482 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:23,041 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-04-15 05:25:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:23,736 INFO L93 Difference]: Finished difference Result 36897 states and 124743 transitions. [2021-04-15 05:25:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-04-15 05:25:23,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:25:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:23,803 INFO L225 Difference]: With dead ends: 36897 [2021-04-15 05:25:23,803 INFO L226 Difference]: Without dead ends: 36841 [2021-04-15 05:25:23,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2958 ImplicationChecksByTransitivity, 4216.3ms TimeCoverageRelationStatistics Valid=1863, Invalid=6327, Unknown=0, NotChecked=0, Total=8190 [2021-04-15 05:25:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36841 states. [2021-04-15 05:25:24,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36841 to 21909. [2021-04-15 05:25:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21909 states, 21908 states have (on average 3.4994066094577323) internal successors, (76665), 21908 states have internal predecessors, (76665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21909 states to 21909 states and 76665 transitions. [2021-04-15 05:25:24,419 INFO L78 Accepts]: Start accepts. Automaton has 21909 states and 76665 transitions. Word has length 36 [2021-04-15 05:25:24,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:24,419 INFO L480 AbstractCegarLoop]: Abstraction has 21909 states and 76665 transitions. [2021-04-15 05:25:24,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 21909 states and 76665 transitions. [2021-04-15 05:25:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:24,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:24,448 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:24,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-04-15 05:25:24,648 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 89 times [2021-04-15 05:25:24,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:24,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208335229] [2021-04-15 05:25:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:24,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208335229] [2021-04-15 05:25:24,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132870526] [2021-04-15 05:25:24,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:24,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:25:24,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:25:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:25:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:25,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:25,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-04-15 05:25:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101166716] [2021-04-15 05:25:25,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 05:25:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 05:25:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-04-15 05:25:25,525 INFO L87 Difference]: Start difference. First operand 21909 states and 76665 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2021-04-15 05:25:27,760 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 05:25:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:31,522 INFO L93 Difference]: Finished difference Result 42090 states and 141214 transitions. [2021-04-15 05:25:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-04-15 05:25:31,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 36 [2021-04-15 05:25:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:31,601 INFO L225 Difference]: With dead ends: 42090 [2021-04-15 05:25:31,601 INFO L226 Difference]: Without dead ends: 41974 [2021-04-15 05:25:31,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 3593.2ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-04-15 05:25:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41974 states. [2021-04-15 05:25:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41974 to 21711. [2021-04-15 05:25:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21711 states, 21710 states have (on average 3.49355135882082) internal successors, (75845), 21710 states have internal predecessors, (75845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21711 states to 21711 states and 75845 transitions. [2021-04-15 05:25:32,157 INFO L78 Accepts]: Start accepts. Automaton has 21711 states and 75845 transitions. Word has length 36 [2021-04-15 05:25:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:32,157 INFO L480 AbstractCegarLoop]: Abstraction has 21711 states and 75845 transitions. [2021-04-15 05:25:32,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2021-04-15 05:25:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 21711 states and 75845 transitions. [2021-04-15 05:25:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:32,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:32,184 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:32,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-04-15 05:25:32,385 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 90 times [2021-04-15 05:25:32,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:32,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077814529] [2021-04-15 05:25:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:32,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077814529] [2021-04-15 05:25:32,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872520396] [2021-04-15 05:25:32,634 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:32,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:25:32,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:25:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:25:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:25:33,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:33,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-04-15 05:25:33,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443082067] [2021-04-15 05:25:33,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:25:33,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:25:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:25:33,225 INFO L87 Difference]: Start difference. First operand 21711 states and 75845 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:25:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:40,511 INFO L93 Difference]: Finished difference Result 41883 states and 139985 transitions. [2021-04-15 05:25:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-04-15 05:25:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 36 [2021-04-15 05:25:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:40,591 INFO L225 Difference]: With dead ends: 41883 [2021-04-15 05:25:40,591 INFO L226 Difference]: Without dead ends: 41703 [2021-04-15 05:25:40,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 4519.7ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-04-15 05:25:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41703 states. [2021-04-15 05:25:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41703 to 21727. [2021-04-15 05:25:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21727 states, 21726 states have (on average 3.493279941084415) internal successors, (75895), 21726 states have internal predecessors, (75895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21727 states to 21727 states and 75895 transitions. [2021-04-15 05:25:41,208 INFO L78 Accepts]: Start accepts. Automaton has 21727 states and 75895 transitions. Word has length 36 [2021-04-15 05:25:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:41,208 INFO L480 AbstractCegarLoop]: Abstraction has 21727 states and 75895 transitions. [2021-04-15 05:25:41,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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) [2021-04-15 05:25:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 21727 states and 75895 transitions. [2021-04-15 05:25:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:41,237 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:41,237 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:41,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:41,437 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:41,438 INFO L82 PathProgramCache]: Analyzing trace with hash -592113680, now seen corresponding path program 91 times [2021-04-15 05:25:41,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:41,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85441790] [2021-04-15 05:25:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:41,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85441790] [2021-04-15 05:25:41,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12704262] [2021-04-15 05:25:41,718 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:41,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:25:41,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:42,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:42,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-04-15 05:25:42,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814792761] [2021-04-15 05:25:42,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:25:42,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:25:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:25:42,481 INFO L87 Difference]: Start difference. First operand 21727 states and 75895 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-04-15 05:25:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:47,354 INFO L93 Difference]: Finished difference Result 38182 states and 129423 transitions. [2021-04-15 05:25:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 05:25:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 36 [2021-04-15 05:25:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:47,433 INFO L225 Difference]: With dead ends: 38182 [2021-04-15 05:25:47,433 INFO L226 Difference]: Without dead ends: 38182 [2021-04-15 05:25:47,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 3569.9ms TimeCoverageRelationStatistics Valid=1260, Invalid=3996, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 05:25:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38182 states. [2021-04-15 05:25:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38182 to 23401. [2021-04-15 05:25:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23401 states, 23400 states have (on average 3.504230769230769) internal successors, (81999), 23400 states have internal predecessors, (81999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23401 states to 23401 states and 81999 transitions. [2021-04-15 05:25:48,036 INFO L78 Accepts]: Start accepts. Automaton has 23401 states and 81999 transitions. Word has length 36 [2021-04-15 05:25:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:48,036 INFO L480 AbstractCegarLoop]: Abstraction has 23401 states and 81999 transitions. [2021-04-15 05:25:48,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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) [2021-04-15 05:25:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 23401 states and 81999 transitions. [2021-04-15 05:25:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:48,067 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:48,067 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:48,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-04-15 05:25:48,267 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:48,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1687332880, now seen corresponding path program 92 times [2021-04-15 05:25:48,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:48,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513150901] [2021-04-15 05:25:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:25:48,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513150901] [2021-04-15 05:25:48,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094549710] [2021-04-15 05:25:48,530 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:48,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:25:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:25:48,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:25:48,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:25:49,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:49,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-04-15 05:25:49,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081385318] [2021-04-15 05:25:49,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:25:49,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:25:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:25:49,177 INFO L87 Difference]: Start difference. First operand 23401 states and 81999 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:25:54,938 INFO L93 Difference]: Finished difference Result 38832 states and 131890 transitions. [2021-04-15 05:25:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 05:25:54,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:25:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:25:55,018 INFO L225 Difference]: With dead ends: 38832 [2021-04-15 05:25:55,018 INFO L226 Difference]: Without dead ends: 38784 [2021-04-15 05:25:55,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 3995.9ms TimeCoverageRelationStatistics Valid=1598, Invalid=5542, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 05:25:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38784 states. [2021-04-15 05:25:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38784 to 23571. [2021-04-15 05:25:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23571 states, 23570 states have (on average 3.5004666949512093) internal successors, (82506), 23570 states have internal predecessors, (82506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23571 states to 23571 states and 82506 transitions. [2021-04-15 05:25:55,622 INFO L78 Accepts]: Start accepts. Automaton has 23571 states and 82506 transitions. Word has length 36 [2021-04-15 05:25:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:25:55,622 INFO L480 AbstractCegarLoop]: Abstraction has 23571 states and 82506 transitions. [2021-04-15 05:25:55,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:25:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 23571 states and 82506 transitions. [2021-04-15 05:25:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:25:55,651 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:25:55,651 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:25:55,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-04-15 05:25:55,852 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:25:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:25:55,852 INFO L82 PathProgramCache]: Analyzing trace with hash 102116908, now seen corresponding path program 93 times [2021-04-15 05:25:55,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:25:55,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230355034] [2021-04-15 05:25:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:25:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:25:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:25:56,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230355034] [2021-04-15 05:25:56,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226293339] [2021-04-15 05:25:56,092 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:25:56,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:25:56,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:25:56,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:25:56,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:25:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:25:56,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:25:56,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-04-15 05:25:56,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474356893] [2021-04-15 05:25:56,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:25:56,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:25:56,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:25:56,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:25:56,760 INFO L87 Difference]: Start difference. First operand 23571 states and 82506 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-04-15 05:26:01,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:01,718 INFO L93 Difference]: Finished difference Result 38917 states and 132129 transitions. [2021-04-15 05:26:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-04-15 05:26:01,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 36 [2021-04-15 05:26:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:01,797 INFO L225 Difference]: With dead ends: 38917 [2021-04-15 05:26:01,797 INFO L226 Difference]: Without dead ends: 38881 [2021-04-15 05:26:01,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 3043.3ms TimeCoverageRelationStatistics Valid=1166, Invalid=4384, Unknown=0, NotChecked=0, Total=5550 [2021-04-15 05:26:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38881 states. [2021-04-15 05:26:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38881 to 23801. [2021-04-15 05:26:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23801 states, 23800 states have (on average 3.496344537815126) internal successors, (83213), 23800 states have internal predecessors, (83213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:02,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23801 states to 23801 states and 83213 transitions. [2021-04-15 05:26:02,412 INFO L78 Accepts]: Start accepts. Automaton has 23801 states and 83213 transitions. Word has length 36 [2021-04-15 05:26:02,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:02,412 INFO L480 AbstractCegarLoop]: Abstraction has 23801 states and 83213 transitions. [2021-04-15 05:26:02,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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) [2021-04-15 05:26:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 23801 states and 83213 transitions. [2021-04-15 05:26:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:02,445 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:02,445 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:02,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:02,645 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:02,646 INFO L82 PathProgramCache]: Analyzing trace with hash -181556176, now seen corresponding path program 94 times [2021-04-15 05:26:02,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:02,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142058237] [2021-04-15 05:26:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:26:02,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142058237] [2021-04-15 05:26:02,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449157439] [2021-04-15 05:26:02,916 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:02,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:26:02,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:26:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:26:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:26:03,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:03,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-04-15 05:26:03,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842899882] [2021-04-15 05:26:03,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:26:03,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:03,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:26:03,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:26:03,629 INFO L87 Difference]: Start difference. First operand 23801 states and 83213 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:26:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:09,077 INFO L93 Difference]: Finished difference Result 38829 states and 131925 transitions. [2021-04-15 05:26:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-04-15 05:26:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 36 [2021-04-15 05:26:09,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:09,158 INFO L225 Difference]: With dead ends: 38829 [2021-04-15 05:26:09,158 INFO L226 Difference]: Without dead ends: 38769 [2021-04-15 05:26:09,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 3485.3ms TimeCoverageRelationStatistics Valid=1274, Invalid=4732, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 05:26:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38769 states. [2021-04-15 05:26:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38769 to 23801. [2021-04-15 05:26:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23801 states, 23800 states have (on average 3.4960084033613446) internal successors, (83205), 23800 states have internal predecessors, (83205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:09,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23801 states to 23801 states and 83205 transitions. [2021-04-15 05:26:09,890 INFO L78 Accepts]: Start accepts. Automaton has 23801 states and 83205 transitions. Word has length 36 [2021-04-15 05:26:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:09,890 INFO L480 AbstractCegarLoop]: Abstraction has 23801 states and 83205 transitions. [2021-04-15 05:26:09,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:26:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23801 states and 83205 transitions. [2021-04-15 05:26:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:09,923 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:09,923 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:10,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:10,123 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1336665204, now seen corresponding path program 95 times [2021-04-15 05:26:10,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:10,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137698946] [2021-04-15 05:26:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:26:10,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137698946] [2021-04-15 05:26:10,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835932685] [2021-04-15 05:26:10,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:10,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:26:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:26:10,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:26:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:26:11,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:11,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-04-15 05:26:11,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977859409] [2021-04-15 05:26:11,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:26:11,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:11,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:26:11,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:26:11,169 INFO L87 Difference]: Start difference. First operand 23801 states and 83205 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:14,978 INFO L93 Difference]: Finished difference Result 44469 states and 150379 transitions. [2021-04-15 05:26:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:26:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:26:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:15,223 INFO L225 Difference]: With dead ends: 44469 [2021-04-15 05:26:15,223 INFO L226 Difference]: Without dead ends: 44469 [2021-04-15 05:26:15,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2281.0ms TimeCoverageRelationStatistics Valid=704, Invalid=2266, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 05:26:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44469 states. [2021-04-15 05:26:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44469 to 24155. [2021-04-15 05:26:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24155 states, 24154 states have (on average 3.4910987828103006) internal successors, (84324), 24154 states have internal predecessors, (84324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24155 states to 24155 states and 84324 transitions. [2021-04-15 05:26:15,785 INFO L78 Accepts]: Start accepts. Automaton has 24155 states and 84324 transitions. Word has length 36 [2021-04-15 05:26:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:15,785 INFO L480 AbstractCegarLoop]: Abstraction has 24155 states and 84324 transitions. [2021-04-15 05:26:15,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 24155 states and 84324 transitions. [2021-04-15 05:26:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:15,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:15,815 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:16,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:16,016 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1185682570, now seen corresponding path program 96 times [2021-04-15 05:26:16,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:16,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107327733] [2021-04-15 05:26:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:26:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107327733] [2021-04-15 05:26:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272825419] [2021-04-15 05:26:16,281 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:16,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 05:26:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:26:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:26:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:26:17,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:17,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-04-15 05:26:17,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699155569] [2021-04-15 05:26:17,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:26:17,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:17,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:26:17,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:26:17,122 INFO L87 Difference]: Start difference. First operand 24155 states and 84324 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:20,214 INFO L93 Difference]: Finished difference Result 43602 states and 147506 transitions. [2021-04-15 05:26:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:26:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:26:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:20,303 INFO L225 Difference]: With dead ends: 43602 [2021-04-15 05:26:20,303 INFO L226 Difference]: Without dead ends: 43602 [2021-04-15 05:26:20,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1861.1ms TimeCoverageRelationStatistics Valid=501, Invalid=1661, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:26:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43602 states. [2021-04-15 05:26:20,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43602 to 24507. [2021-04-15 05:26:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24507 states, 24506 states have (on average 3.486574716395985) internal successors, (85442), 24506 states have internal predecessors, (85442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24507 states to 24507 states and 85442 transitions. [2021-04-15 05:26:20,995 INFO L78 Accepts]: Start accepts. Automaton has 24507 states and 85442 transitions. Word has length 36 [2021-04-15 05:26:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:20,996 INFO L480 AbstractCegarLoop]: Abstraction has 24507 states and 85442 transitions. [2021-04-15 05:26:20,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24507 states and 85442 transitions. [2021-04-15 05:26:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:21,032 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:21,032 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:21,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-04-15 05:26:21,233 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1486246796, now seen corresponding path program 97 times [2021-04-15 05:26:21,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:21,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769220633] [2021-04-15 05:26:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:26:21,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769220633] [2021-04-15 05:26:21,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198535216] [2021-04-15 05:26:21,472 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:21,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:26:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:26:22,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:22,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-04-15 05:26:22,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864495079] [2021-04-15 05:26:22,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:26:22,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:22,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:26:22,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:26:22,311 INFO L87 Difference]: Start difference. First operand 24507 states and 85442 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:25,596 INFO L93 Difference]: Finished difference Result 49231 states and 166293 transitions. [2021-04-15 05:26:25,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 05:26:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:26:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:25,706 INFO L225 Difference]: With dead ends: 49231 [2021-04-15 05:26:25,706 INFO L226 Difference]: Without dead ends: 49231 [2021-04-15 05:26:25,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1841.7ms TimeCoverageRelationStatistics Valid=509, Invalid=1653, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:26:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49231 states. [2021-04-15 05:26:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49231 to 25053. [2021-04-15 05:26:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.4985230720102187) internal successors, (87645), 25052 states have internal predecessors, (87645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 87645 transitions. [2021-04-15 05:26:26,466 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 87645 transitions. Word has length 36 [2021-04-15 05:26:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:26,466 INFO L480 AbstractCegarLoop]: Abstraction has 25053 states and 87645 transitions. [2021-04-15 05:26:26,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 87645 transitions. [2021-04-15 05:26:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:26,498 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:26,498 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:26,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 05:26:26,698 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:26,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1637229430, now seen corresponding path program 98 times [2021-04-15 05:26:26,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:26,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517346941] [2021-04-15 05:26:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:26:26,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517346941] [2021-04-15 05:26:26,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319140633] [2021-04-15 05:26:26,939 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:26,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:26:26,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:26:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:26:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:26:27,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:27,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-04-15 05:26:27,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609507611] [2021-04-15 05:26:27,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:26:27,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:26:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:26:27,874 INFO L87 Difference]: Start difference. First operand 25053 states and 87645 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:31,824 INFO L93 Difference]: Finished difference Result 47934 states and 162044 transitions. [2021-04-15 05:26:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:26:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:26:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:31,921 INFO L225 Difference]: With dead ends: 47934 [2021-04-15 05:26:31,921 INFO L226 Difference]: Without dead ends: 47934 [2021-04-15 05:26:31,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1908.7ms TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 05:26:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47934 states. [2021-04-15 05:26:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47934 to 25473. [2021-04-15 05:26:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25473 states, 25472 states have (on average 3.4928941582914574) internal successors, (88971), 25472 states have internal predecessors, (88971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25473 states to 25473 states and 88971 transitions. [2021-04-15 05:26:32,702 INFO L78 Accepts]: Start accepts. Automaton has 25473 states and 88971 transitions. Word has length 36 [2021-04-15 05:26:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:32,702 INFO L480 AbstractCegarLoop]: Abstraction has 25473 states and 88971 transitions. [2021-04-15 05:26:32,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25473 states and 88971 transitions. [2021-04-15 05:26:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:32,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:32,734 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:32,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 05:26:32,936 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:32,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1172720400, now seen corresponding path program 99 times [2021-04-15 05:26:32,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:32,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105106562] [2021-04-15 05:26:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:26:33,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105106562] [2021-04-15 05:26:33,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754883568] [2021-04-15 05:26:33,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:33,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 05:26:33,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:26:33,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 05:26:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-04-15 05:26:33,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:26:33,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:26:34,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 05:26:34,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-04-15 05:26:34,405 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-04-15 05:26:34,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-04-15 05:26:34,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:26:34,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:26:34,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 05:26:34,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:36 [2021-04-15 05:26:34,801 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-04-15 05:26:34,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-04-15 05:26:34,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 05:26:34,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 05:26:34,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-04-15 05:26:34,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:48 [2021-04-15 05:26:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 05:26:35,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:35,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 05:26:35,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035026741] [2021-04-15 05:26:35,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 05:26:35,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:35,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 05:26:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-04-15 05:26:35,410 INFO L87 Difference]: Start difference. First operand 25473 states and 88971 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:43,717 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 05:26:45,606 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 05:26:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:48,617 INFO L93 Difference]: Finished difference Result 43335 states and 145026 transitions. [2021-04-15 05:26:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-04-15 05:26:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:26:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:48,703 INFO L225 Difference]: With dead ends: 43335 [2021-04-15 05:26:48,704 INFO L226 Difference]: Without dead ends: 43320 [2021-04-15 05:26:48,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 8446.5ms TimeCoverageRelationStatistics Valid=1534, Invalid=7778, Unknown=0, NotChecked=0, Total=9312 [2021-04-15 05:26:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43320 states. [2021-04-15 05:26:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43320 to 26157. [2021-04-15 05:26:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26157 states, 26156 states have (on average 3.504396696742621) internal successors, (91661), 26156 states have internal predecessors, (91661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26157 states to 26157 states and 91661 transitions. [2021-04-15 05:26:49,450 INFO L78 Accepts]: Start accepts. Automaton has 26157 states and 91661 transitions. Word has length 36 [2021-04-15 05:26:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:49,450 INFO L480 AbstractCegarLoop]: Abstraction has 26157 states and 91661 transitions. [2021-04-15 05:26:49,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26157 states and 91661 transitions. [2021-04-15 05:26:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:49,490 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:49,490 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:49,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-04-15 05:26:49,690 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash -248629260, now seen corresponding path program 100 times [2021-04-15 05:26:49,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:49,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159903495] [2021-04-15 05:26:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:26:49,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159903495] [2021-04-15 05:26:49,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862200927] [2021-04-15 05:26:49,939 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:49,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:26:49,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:26:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:26:49,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:26:50,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:50,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-04-15 05:26:50,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225053692] [2021-04-15 05:26:50,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:26:50,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:50,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:26:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:26:50,910 INFO L87 Difference]: Start difference. First operand 26157 states and 91661 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:26:56,365 INFO L93 Difference]: Finished difference Result 52962 states and 179252 transitions. [2021-04-15 05:26:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 05:26:56,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:26:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:26:56,471 INFO L225 Difference]: With dead ends: 52962 [2021-04-15 05:26:56,471 INFO L226 Difference]: Without dead ends: 52962 [2021-04-15 05:26:56,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 2938.1ms TimeCoverageRelationStatistics Valid=910, Invalid=2996, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 05:26:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52962 states. [2021-04-15 05:26:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52962 to 25604. [2021-04-15 05:26:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25604 states, 25603 states have (on average 3.48736476194196) internal successors, (89287), 25603 states have internal predecessors, (89287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25604 states to 25604 states and 89287 transitions. [2021-04-15 05:26:57,213 INFO L78 Accepts]: Start accepts. Automaton has 25604 states and 89287 transitions. Word has length 36 [2021-04-15 05:26:57,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:26:57,213 INFO L480 AbstractCegarLoop]: Abstraction has 25604 states and 89287 transitions. [2021-04-15 05:26:57,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:26:57,213 INFO L276 IsEmpty]: Start isEmpty. Operand 25604 states and 89287 transitions. [2021-04-15 05:26:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:26:57,252 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:26:57,252 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:26:57,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-04-15 05:26:57,452 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:26:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:26:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1447944180, now seen corresponding path program 101 times [2021-04-15 05:26:57,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:26:57,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881719308] [2021-04-15 05:26:57,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:26:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:26:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:26:57,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881719308] [2021-04-15 05:26:57,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927135700] [2021-04-15 05:26:57,699 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:26:57,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:26:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:26:57,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:26:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:26:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:26:58,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:26:58,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-04-15 05:26:58,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529118664] [2021-04-15 05:26:58,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:26:58,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:26:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:26:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:26:58,657 INFO L87 Difference]: Start difference. First operand 25604 states and 89287 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:04,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:27:04,460 INFO L93 Difference]: Finished difference Result 50898 states and 171999 transitions. [2021-04-15 05:27:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 05:27:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:27:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:27:04,578 INFO L225 Difference]: With dead ends: 50898 [2021-04-15 05:27:04,578 INFO L226 Difference]: Without dead ends: 50898 [2021-04-15 05:27:04,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 3136.8ms TimeCoverageRelationStatistics Valid=959, Invalid=3073, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 05:27:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50898 states. [2021-04-15 05:27:05,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50898 to 25574. [2021-04-15 05:27:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25574 states, 25573 states have (on average 3.4882493254604467) internal successors, (89205), 25573 states have internal predecessors, (89205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25574 states to 25574 states and 89205 transitions. [2021-04-15 05:27:05,434 INFO L78 Accepts]: Start accepts. Automaton has 25574 states and 89205 transitions. Word has length 36 [2021-04-15 05:27:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:27:05,435 INFO L480 AbstractCegarLoop]: Abstraction has 25574 states and 89205 transitions. [2021-04-15 05:27:05,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 25574 states and 89205 transitions. [2021-04-15 05:27:05,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:27:05,482 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:27:05,482 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:27:05,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:05,683 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:27:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:27:05,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1463404976, now seen corresponding path program 102 times [2021-04-15 05:27:05,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:27:05,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868264412] [2021-04-15 05:27:05,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:27:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:27:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:27:05,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868264412] [2021-04-15 05:27:05,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389874335] [2021-04-15 05:27:05,941 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:05,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 05:27:05,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:27:05,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:27:05,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:27:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:27:06,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:27:06,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-04-15 05:27:06,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390776067] [2021-04-15 05:27:06,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:27:06,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:27:06,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:27:06,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:27:06,930 INFO L87 Difference]: Start difference. First operand 25574 states and 89205 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:27:13,717 INFO L93 Difference]: Finished difference Result 51060 states and 171881 transitions. [2021-04-15 05:27:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-04-15 05:27:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:27:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:27:13,832 INFO L225 Difference]: With dead ends: 51060 [2021-04-15 05:27:13,832 INFO L226 Difference]: Without dead ends: 51060 [2021-04-15 05:27:13,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 3823.8ms TimeCoverageRelationStatistics Valid=1313, Invalid=3799, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 05:27:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51060 states. [2021-04-15 05:27:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51060 to 25506. [2021-04-15 05:27:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25506 states, 25505 states have (on average 3.484297196628112) internal successors, (88867), 25505 states have internal predecessors, (88867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25506 states to 25506 states and 88867 transitions. [2021-04-15 05:27:14,747 INFO L78 Accepts]: Start accepts. Automaton has 25506 states and 88867 transitions. Word has length 36 [2021-04-15 05:27:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:27:14,747 INFO L480 AbstractCegarLoop]: Abstraction has 25506 states and 88867 transitions. [2021-04-15 05:27:14,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 25506 states and 88867 transitions. [2021-04-15 05:27:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:27:14,785 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:27:14,785 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:27:14,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-04-15 05:27:14,985 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:27:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:27:14,985 INFO L82 PathProgramCache]: Analyzing trace with hash -784175790, now seen corresponding path program 103 times [2021-04-15 05:27:14,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:27:14,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670666189] [2021-04-15 05:27:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:27:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:27:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:27:15,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670666189] [2021-04-15 05:27:15,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087640905] [2021-04-15 05:27:15,218 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:27:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:27:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:27:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:27:16,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:27:16,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 05:27:16,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469758599] [2021-04-15 05:27:16,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:27:16,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:27:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:27:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:27:16,139 INFO L87 Difference]: Start difference. First operand 25506 states and 88867 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:23,479 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-04-15 05:27:29,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:27:29,262 INFO L93 Difference]: Finished difference Result 49899 states and 166220 transitions. [2021-04-15 05:27:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-04-15 05:27:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:27:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:27:29,371 INFO L225 Difference]: With dead ends: 49899 [2021-04-15 05:27:29,371 INFO L226 Difference]: Without dead ends: 49899 [2021-04-15 05:27:29,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7511 ImplicationChecksByTransitivity, 8526.0ms TimeCoverageRelationStatistics Valid=3298, Invalid=15608, Unknown=0, NotChecked=0, Total=18906 [2021-04-15 05:27:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49899 states. [2021-04-15 05:27:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49899 to 25544. [2021-04-15 05:27:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25544 states, 25543 states have (on average 3.485612496574404) internal successors, (89033), 25543 states have internal predecessors, (89033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25544 states to 25544 states and 89033 transitions. [2021-04-15 05:27:30,072 INFO L78 Accepts]: Start accepts. Automaton has 25544 states and 89033 transitions. Word has length 36 [2021-04-15 05:27:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:27:30,073 INFO L480 AbstractCegarLoop]: Abstraction has 25544 states and 89033 transitions. [2021-04-15 05:27:30,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 25544 states and 89033 transitions. [2021-04-15 05:27:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:27:30,112 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:27:30,112 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:27:30,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-04-15 05:27:30,312 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:27:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:27:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash 74647476, now seen corresponding path program 104 times [2021-04-15 05:27:30,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:27:30,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562736957] [2021-04-15 05:27:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:27:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:27:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:27:30,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562736957] [2021-04-15 05:27:30,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475128403] [2021-04-15 05:27:30,619 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:30,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:27:30,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:27:30,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:27:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:27:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:27:31,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:27:31,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-04-15 05:27:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99497544] [2021-04-15 05:27:31,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:27:31,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:27:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:27:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:27:31,401 INFO L87 Difference]: Start difference. First operand 25544 states and 89033 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:27:38,992 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-04-15 05:27:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:27:40,644 INFO L93 Difference]: Finished difference Result 45713 states and 152679 transitions. [2021-04-15 05:27:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-04-15 05:27:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 36 [2021-04-15 05:27:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:27:40,740 INFO L225 Difference]: With dead ends: 45713 [2021-04-15 05:27:40,740 INFO L226 Difference]: Without dead ends: 45581 [2021-04-15 05:27:40,741 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4250 ImplicationChecksByTransitivity, 6300.3ms TimeCoverageRelationStatistics Valid=2236, Invalid=9536, Unknown=0, NotChecked=0, Total=11772 [2021-04-15 05:27:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45581 states. [2021-04-15 05:27:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45581 to 25841. [2021-04-15 05:27:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25841 states, 25840 states have (on average 3.48343653250774) internal successors, (90012), 25840 states have internal predecessors, (90012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25841 states to 25841 states and 90012 transitions. [2021-04-15 05:27:41,431 INFO L78 Accepts]: Start accepts. Automaton has 25841 states and 90012 transitions. Word has length 36 [2021-04-15 05:27:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:27:41,431 INFO L480 AbstractCegarLoop]: Abstraction has 25841 states and 90012 transitions. [2021-04-15 05:27:41,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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) [2021-04-15 05:27:41,431 INFO L276 IsEmpty]: Start isEmpty. Operand 25841 states and 90012 transitions. [2021-04-15 05:27:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:27:41,472 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:27:41,472 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:27:41,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:41,673 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:27:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:27:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1793730568, now seen corresponding path program 105 times [2021-04-15 05:27:41,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:27:41,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265976922] [2021-04-15 05:27:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:27:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:27:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:27:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265976922] [2021-04-15 05:27:41,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336425714] [2021-04-15 05:27:41,932 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:41,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 05:27:41,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:27:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:27:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:27:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:27:42,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:27:42,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-04-15 05:27:42,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713593003] [2021-04-15 05:27:42,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:27:42,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:27:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:27:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:27:42,832 INFO L87 Difference]: Start difference. First operand 25841 states and 90012 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:27:46,890 INFO L93 Difference]: Finished difference Result 50750 states and 173736 transitions. [2021-04-15 05:27:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 05:27:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:27:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:27:47,010 INFO L225 Difference]: With dead ends: 50750 [2021-04-15 05:27:47,011 INFO L226 Difference]: Without dead ends: 50750 [2021-04-15 05:27:47,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 2288.3ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 05:27:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50750 states. [2021-04-15 05:27:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50750 to 26465. [2021-04-15 05:27:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26465 states, 26464 states have (on average 3.5064238210399035) internal successors, (92794), 26464 states have internal predecessors, (92794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26465 states to 26465 states and 92794 transitions. [2021-04-15 05:27:47,909 INFO L78 Accepts]: Start accepts. Automaton has 26465 states and 92794 transitions. Word has length 36 [2021-04-15 05:27:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:27:47,909 INFO L480 AbstractCegarLoop]: Abstraction has 26465 states and 92794 transitions. [2021-04-15 05:27:47,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 26465 states and 92794 transitions. [2021-04-15 05:27:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:27:47,949 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:27:47,949 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:27:48,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:48,150 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:27:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:27:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1809191364, now seen corresponding path program 106 times [2021-04-15 05:27:48,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:27:48,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398420781] [2021-04-15 05:27:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:27:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:27:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:27:48,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398420781] [2021-04-15 05:27:48,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932405334] [2021-04-15 05:27:48,431 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:48,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:27:48,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:27:48,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:27:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:27:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:27:49,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:27:49,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-04-15 05:27:49,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652244865] [2021-04-15 05:27:49,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:27:49,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:27:49,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:27:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:27:49,326 INFO L87 Difference]: Start difference. First operand 26465 states and 92794 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:27:53,878 INFO L93 Difference]: Finished difference Result 49853 states and 169898 transitions. [2021-04-15 05:27:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 05:27:53,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:27:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:27:53,997 INFO L225 Difference]: With dead ends: 49853 [2021-04-15 05:27:53,998 INFO L226 Difference]: Without dead ends: 49853 [2021-04-15 05:27:53,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 2573.2ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 05:27:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49853 states. [2021-04-15 05:27:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49853 to 26010. [2021-04-15 05:27:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26010 states, 26009 states have (on average 3.49282940520589) internal successors, (90845), 26009 states have internal predecessors, (90845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26010 states to 26010 states and 90845 transitions. [2021-04-15 05:27:54,863 INFO L78 Accepts]: Start accepts. Automaton has 26010 states and 90845 transitions. Word has length 36 [2021-04-15 05:27:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:27:54,863 INFO L480 AbstractCegarLoop]: Abstraction has 26010 states and 90845 transitions. [2021-04-15 05:27:54,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:27:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26010 states and 90845 transitions. [2021-04-15 05:27:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:27:54,904 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:27:54,904 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:27:55,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:55,104 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:27:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:27:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash 441270926, now seen corresponding path program 107 times [2021-04-15 05:27:55,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:27:55,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050835653] [2021-04-15 05:27:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:27:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:27:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:27:55,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050835653] [2021-04-15 05:27:55,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767318710] [2021-04-15 05:27:55,333 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:27:55,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:27:55,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:27:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:27:55,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:27:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:27:56,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:27:56,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-04-15 05:27:56,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850039222] [2021-04-15 05:27:56,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 05:27:56,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:27:56,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 05:27:56,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 05:27:56,184 INFO L87 Difference]: Start difference. First operand 26010 states and 90845 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-04-15 05:27:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:27:59,376 INFO L93 Difference]: Finished difference Result 46761 states and 158580 transitions. [2021-04-15 05:27:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 05:27:59,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 36 [2021-04-15 05:27:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:27:59,471 INFO L225 Difference]: With dead ends: 46761 [2021-04-15 05:27:59,472 INFO L226 Difference]: Without dead ends: 46761 [2021-04-15 05:27:59,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1768.1ms TimeCoverageRelationStatistics Valid=470, Invalid=1252, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 05:27:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46761 states. [2021-04-15 05:28:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46761 to 26006. [2021-04-15 05:28:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26006 states, 26005 states have (on average 3.4926744856758316) internal successors, (90827), 26005 states have internal predecessors, (90827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26006 states to 26006 states and 90827 transitions. [2021-04-15 05:28:00,325 INFO L78 Accepts]: Start accepts. Automaton has 26006 states and 90827 transitions. Word has length 36 [2021-04-15 05:28:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:28:00,325 INFO L480 AbstractCegarLoop]: Abstraction has 26006 states and 90827 transitions. [2021-04-15 05:28:00,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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) [2021-04-15 05:28:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 26006 states and 90827 transitions. [2021-04-15 05:28:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:28:00,368 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:28:00,368 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:28:00,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:28:00,569 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:28:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:28:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -530582264, now seen corresponding path program 108 times [2021-04-15 05:28:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:28:00,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517387230] [2021-04-15 05:28:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:28:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:28:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:28:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517387230] [2021-04-15 05:28:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285465403] [2021-04-15 05:28:00,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:28:00,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 05:28:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:28:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:28:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:28:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:28:01,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:28:01,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-04-15 05:28:01,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147200871] [2021-04-15 05:28:01,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 05:28:01,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:28:01,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 05:28:01,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-04-15 05:28:01,942 INFO L87 Difference]: Start difference. First operand 26006 states and 90827 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:28:18,086 INFO L93 Difference]: Finished difference Result 68526 states and 226261 transitions. [2021-04-15 05:28:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-04-15 05:28:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:28:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:28:18,242 INFO L225 Difference]: With dead ends: 68526 [2021-04-15 05:28:18,242 INFO L226 Difference]: Without dead ends: 68526 [2021-04-15 05:28:18,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12884 ImplicationChecksByTransitivity, 12403.7ms TimeCoverageRelationStatistics Valid=5153, Invalid=24603, Unknown=0, NotChecked=0, Total=29756 [2021-04-15 05:28:18,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68526 states. [2021-04-15 05:28:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68526 to 31790. [2021-04-15 05:28:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31790 states, 31789 states have (on average 3.5069049042121487) internal successors, (111481), 31789 states have internal predecessors, (111481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:19,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31790 states to 31790 states and 111481 transitions. [2021-04-15 05:28:19,334 INFO L78 Accepts]: Start accepts. Automaton has 31790 states and 111481 transitions. Word has length 36 [2021-04-15 05:28:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:28:19,335 INFO L480 AbstractCegarLoop]: Abstraction has 31790 states and 111481 transitions. [2021-04-15 05:28:19,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 31790 states and 111481 transitions. [2021-04-15 05:28:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:28:19,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:28:19,381 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:28:19,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-04-15 05:28:19,582 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:28:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:28:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2079713946, now seen corresponding path program 109 times [2021-04-15 05:28:19,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:28:19,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210508320] [2021-04-15 05:28:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:28:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:28:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:28:19,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210508320] [2021-04-15 05:28:19,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898639597] [2021-04-15 05:28:19,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:28:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:28:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:28:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:28:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:28:20,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:28:20,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 05:28:20,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018635567] [2021-04-15 05:28:20,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 05:28:20,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:28:20,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 05:28:20,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-04-15 05:28:20,931 INFO L87 Difference]: Start difference. First operand 31790 states and 111481 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:28:31,831 INFO L93 Difference]: Finished difference Result 63716 states and 212274 transitions. [2021-04-15 05:28:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-04-15 05:28:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:28:31,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:28:31,984 INFO L225 Difference]: With dead ends: 63716 [2021-04-15 05:28:31,984 INFO L226 Difference]: Without dead ends: 63668 [2021-04-15 05:28:31,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5857 ImplicationChecksByTransitivity, 8065.0ms TimeCoverageRelationStatistics Valid=2598, Invalid=11922, Unknown=0, NotChecked=0, Total=14520 [2021-04-15 05:28:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63668 states. [2021-04-15 05:28:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63668 to 31800. [2021-04-15 05:28:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31800 states, 31799 states have (on average 3.5069656278499326) internal successors, (111518), 31799 states have internal predecessors, (111518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31800 states to 31800 states and 111518 transitions. [2021-04-15 05:28:33,037 INFO L78 Accepts]: Start accepts. Automaton has 31800 states and 111518 transitions. Word has length 36 [2021-04-15 05:28:33,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:28:33,037 INFO L480 AbstractCegarLoop]: Abstraction has 31800 states and 111518 transitions. [2021-04-15 05:28:33,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 31800 states and 111518 transitions. [2021-04-15 05:28:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:28:33,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:28:33,235 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:28:33,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:28:33,441 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:28:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:28:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1443247092, now seen corresponding path program 110 times [2021-04-15 05:28:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:28:33,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365515305] [2021-04-15 05:28:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:28:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:28:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:28:33,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365515305] [2021-04-15 05:28:33,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043452885] [2021-04-15 05:28:33,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:28:33,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 05:28:33,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:28:33,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:28:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:28:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:28:34,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:28:34,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-04-15 05:28:34,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909228662] [2021-04-15 05:28:34,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:28:34,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:28:34,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:28:34,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:28:34,852 INFO L87 Difference]: Start difference. First operand 31800 states and 111518 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:28:44,577 INFO L93 Difference]: Finished difference Result 61171 states and 205472 transitions. [2021-04-15 05:28:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-04-15 05:28:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 05:28:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:28:44,729 INFO L225 Difference]: With dead ends: 61171 [2021-04-15 05:28:44,729 INFO L226 Difference]: Without dead ends: 61047 [2021-04-15 05:28:44,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 7033.5ms TimeCoverageRelationStatistics Valid=1816, Invalid=8690, Unknown=0, NotChecked=0, Total=10506 [2021-04-15 05:28:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61047 states. [2021-04-15 05:28:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61047 to 31868. [2021-04-15 05:28:45,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31868 states, 31867 states have (on average 3.5058838296670536) internal successors, (111722), 31867 states have internal predecessors, (111722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:45,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31868 states to 31868 states and 111722 transitions. [2021-04-15 05:28:45,830 INFO L78 Accepts]: Start accepts. Automaton has 31868 states and 111722 transitions. Word has length 36 [2021-04-15 05:28:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:28:45,830 INFO L480 AbstractCegarLoop]: Abstraction has 31868 states and 111722 transitions. [2021-04-15 05:28:45,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 31868 states and 111722 transitions. [2021-04-15 05:28:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:28:45,883 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:28:45,883 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:28:46,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-04-15 05:28:46,084 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:28:46,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:28:46,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1159574008, now seen corresponding path program 111 times [2021-04-15 05:28:46,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:28:46,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816516469] [2021-04-15 05:28:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:28:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:28:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:28:46,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816516469] [2021-04-15 05:28:46,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859470101] [2021-04-15 05:28:46,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:28:46,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 05:28:46,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:28:46,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 05:28:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:28:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:28:47,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:28:47,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-04-15 05:28:47,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001558848] [2021-04-15 05:28:47,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 05:28:47,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:28:47,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 05:28:47,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-04-15 05:28:47,366 INFO L87 Difference]: Start difference. First operand 31868 states and 111722 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2021-04-15 05:28:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:28:57,243 INFO L93 Difference]: Finished difference Result 62899 states and 210204 transitions. [2021-04-15 05:28:57,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-04-15 05:28:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 36 [2021-04-15 05:28:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:28:57,396 INFO L225 Difference]: With dead ends: 62899 [2021-04-15 05:28:57,396 INFO L226 Difference]: Without dead ends: 62727 [2021-04-15 05:28:57,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3982 ImplicationChecksByTransitivity, 7212.3ms TimeCoverageRelationStatistics Valid=1848, Invalid=8864, Unknown=0, NotChecked=0, Total=10712 [2021-04-15 05:28:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62727 states. [2021-04-15 05:28:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62727 to 33968. [2021-04-15 05:28:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33968 states, 33967 states have (on average 3.494862660817853) internal successors, (118710), 33967 states have internal predecessors, (118710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:28:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33968 states to 33968 states and 118710 transitions. [2021-04-15 05:28:58,495 INFO L78 Accepts]: Start accepts. Automaton has 33968 states and 118710 transitions. Word has length 36 [2021-04-15 05:28:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:28:58,495 INFO L480 AbstractCegarLoop]: Abstraction has 33968 states and 118710 transitions. [2021-04-15 05:28:58,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2021-04-15 05:28:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 33968 states and 118710 transitions. [2021-04-15 05:28:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:28:58,545 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:28:58,545 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:28:58,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-04-15 05:28:58,746 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:28:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:28:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash -867320068, now seen corresponding path program 112 times [2021-04-15 05:28:58,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:28:58,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635256474] [2021-04-15 05:28:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:28:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:28:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:28:59,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635256474] [2021-04-15 05:28:59,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433905540] [2021-04-15 05:28:59,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:28:59,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 05:28:59,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:28:59,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:28:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 05:29:00,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:00,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-04-15 05:29:00,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332775178] [2021-04-15 05:29:00,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 05:29:00,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:00,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 05:29:00,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 05:29:00,156 INFO L87 Difference]: Start difference. First operand 33968 states and 118710 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2021-04-15 05:29:04,985 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-04-15 05:29:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 05:29:08,543 INFO L93 Difference]: Finished difference Result 61620 states and 205953 transitions. [2021-04-15 05:29:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-04-15 05:29:08,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 36 [2021-04-15 05:29:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 05:29:08,703 INFO L225 Difference]: With dead ends: 61620 [2021-04-15 05:29:08,703 INFO L226 Difference]: Without dead ends: 61416 [2021-04-15 05:29:08,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3119 ImplicationChecksByTransitivity, 6224.1ms TimeCoverageRelationStatistics Valid=1530, Invalid=7212, Unknown=0, NotChecked=0, Total=8742 [2021-04-15 05:29:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61416 states. [2021-04-15 05:29:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61416 to 34044. [2021-04-15 05:29:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 34043 states have (on average 3.4930529036806393) internal successors, (118914), 34043 states have internal predecessors, (118914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 05:29:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 118914 transitions. [2021-04-15 05:29:09,760 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 118914 transitions. Word has length 36 [2021-04-15 05:29:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 05:29:09,760 INFO L480 AbstractCegarLoop]: Abstraction has 34044 states and 118914 transitions. [2021-04-15 05:29:09,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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) [2021-04-15 05:29:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 118914 transitions. [2021-04-15 05:29:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 05:29:09,984 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 05:29:09,984 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 05:29:10,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-04-15 05:29:10,202 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 05:29:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 05:29:10,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1551560708, now seen corresponding path program 113 times [2021-04-15 05:29:10,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 05:29:10,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54824455] [2021-04-15 05:29:10,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 05:29:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 05:29:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 05:29:10,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54824455] [2021-04-15 05:29:10,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911431806] [2021-04-15 05:29:10,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:10,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 05:29:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 05:29:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 05:29:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 05:29:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 05:29:11,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 05:29:11,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-04-15 05:29:11,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561218360] [2021-04-15 05:29:11,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 05:29:11,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 05:29:11,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 05:29:11,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-04-15 05:29:11,653 INFO L87 Difference]: Start difference. First operand 34044 states and 118914 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-04-15 05:29:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 05:29:19,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 05:29:19,864 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 05:29:19,867 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 05:29:19,867 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 05:29:19 BasicIcfg [2021-04-15 05:29:19,867 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 05:29:19,868 INFO L168 Benchmark]: Toolchain (without parser) took 808499.78 ms. Allocated memory was 255.9 MB in the beginning and 5.9 GB in the end (delta: 5.7 GB). Free memory was 236.5 MB in the beginning and 4.7 GB in the end (delta: -4.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-04-15 05:29:19,868 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:29:19,868 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.75 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 05:29:19,868 INFO L168 Benchmark]: Boogie Preprocessor took 18.47 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 05:29:19,868 INFO L168 Benchmark]: RCFGBuilder took 275.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 237.4 MB in the end (delta: -3.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. [2021-04-15 05:29:19,868 INFO L168 Benchmark]: TraceAbstraction took 808173.60 ms. Allocated memory was 255.9 MB in the beginning and 5.9 GB in the end (delta: 5.7 GB). Free memory was 237.4 MB in the beginning and 4.7 GB in the end (delta: -4.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-04-15 05:29:19,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.75 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.47 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.1 MB in the end (delta: 913.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 275.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 237.4 MB in the end (delta: -3.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 808173.60 ms. Allocated memory was 255.9 MB in the beginning and 5.9 GB in the end (delta: 5.7 GB). Free memory was 237.4 MB in the beginning and 4.7 GB in the end (delta: -4.5 GB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 67). Cancelled while BasicCegarLoop was constructing difference of abstraction (34044states) and FLOYD_HOARE automaton (currently 83 states, 21 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 86 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 808053.4ms, OverallIterations: 161, TraceHistogramMax: 5, EmptinessCheckTime: 3628.8ms, AutomataDifference: 608664.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10779 SDtfs, 87722 SDslu, 109233 SDs, 0 SdLazy, 142313 SolverSat, 14979 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 93619.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16369 GetRequests, 4343 SyntacticMatches, 64 SemanticMatches, 11961 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411490 ImplicationChecksByTransitivity, 408047.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34044occurred in iteration=160, InterpolantAutomatonStates: 11169, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58646.0ms AutomataMinimizationTime, 160 MinimizatonAttempts, 1828011 StatesRemovedByMinimization, 159 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 602.2ms SsaConstructionTime, 1675.9ms SatisfiabilityAnalysisTime, 99402.0ms InterpolantComputationTime, 10642 NumberOfCodeBlocks, 10616 NumberOfCodeBlocksAsserted, 685 NumberOfCheckSat, 10322 ConstructedInterpolants, 272 QuantifiedInterpolants, 79109 SizeOfPredicates, 587 NumberOfNonLiveVariables, 11184 ConjunctsInSsa, 1821 ConjunctsInUnsatCore, 320 InterpolantComputations, 2 PerfectInterpolantSequences, 2907/7277 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