/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:09:02,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:09:02,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:09:02,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:09:02,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:09:02,300 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:09:02,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:09:02,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:09:02,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:09:02,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:09:02,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:09:02,304 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:09:02,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:09:02,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:09:02,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:09:02,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:09:02,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:09:02,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:09:02,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:09:02,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:09:02,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:09:02,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:09:02,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:09:02,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:09:02,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:09:02,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:09:02,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:09:02,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:09:02,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:09:02,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:09:02,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:09:02,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:09:02,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:09:02,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:09:02,308 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:09:02,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:09:02,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:09:02,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:09:02,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:09:02,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:09:02,653 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:09:02,654 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:09:02,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2021-07-09 17:09:02,655 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2021-07-09 17:09:02,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:09:02,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:09:02,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:02,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:09:02,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:09:02,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:02,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:09:02,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:09:02,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:09:02,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:09:02,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:09:02,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:09:02,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:09:02,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:09:02,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:09:02,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:09:02,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:09:02,850 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:09:02,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:09:02,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:09:02,851 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:09:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:09:02,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:09:02,851 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 17:09:02,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 17:09:02,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 17:09:02,852 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:09:03,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:09:03,109 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:09:03,111 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:03 BoogieIcfgContainer [2021-07-09 17:09:03,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:09:03,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:09:03,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:09:03,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:09:03,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/2) ... [2021-07-09 17:09:03,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c89c1f and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:09:03, skipping insertion in model container [2021-07-09 17:09:03,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:03" (2/2) ... [2021-07-09 17:09:03,118 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2021-07-09 17:09:03,122 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:09:03,123 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:09:03,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:09:03,123 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:09:03,172 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 17:09:03,191 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 17:09:03,207 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:09:03,208 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:09:03,208 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:09:03,208 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:09:03,208 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:09:03,208 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:09:03,224 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:09:03,225 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:09:03,234 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2021-07-09 17:09:03,299 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:09:03,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:03,322 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:03,323 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:03,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1022226388, now seen corresponding path program 1 times [2021-07-09 17:09:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:03,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692209591] [2021-07-09 17:09:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:03,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:03,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692209591] [2021-07-09 17:09:03,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692209591] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:03,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:03,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:03,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947862630] [2021-07-09 17:09:03,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:03,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:03,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:03,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:03,678 INFO L87 Difference]: Start difference. First operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:03,875 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2021-07-09 17:09:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:09:03,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 17:09:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:03,903 INFO L225 Difference]: With dead ends: 606 [2021-07-09 17:09:03,903 INFO L226 Difference]: Without dead ends: 591 [2021-07-09 17:09:03,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:03,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-09 17:09:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2021-07-09 17:09:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2021-07-09 17:09:04,012 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2021-07-09 17:09:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:04,013 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2021-07-09 17:09:04,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2021-07-09 17:09:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:09:04,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:04,016 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:04,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:09:04,017 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:04,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1372690376, now seen corresponding path program 1 times [2021-07-09 17:09:04,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:04,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239286342] [2021-07-09 17:09:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:04,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239286342] [2021-07-09 17:09:04,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239286342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:04,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481401573] [2021-07-09 17:09:04,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 17:09:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481401573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:04,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:04,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:09:04,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058539177] [2021-07-09 17:09:04,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:04,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:04,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:04,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:04,299 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:04,399 INFO L93 Difference]: Finished difference Result 1011 states and 3270 transitions. [2021-07-09 17:09:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:09:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:04,406 INFO L225 Difference]: With dead ends: 1011 [2021-07-09 17:09:04,407 INFO L226 Difference]: Without dead ends: 847 [2021-07-09 17:09:04,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-09 17:09:04,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 440. [2021-07-09 17:09:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2021-07-09 17:09:04,437 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2021-07-09 17:09:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:04,437 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2021-07-09 17:09:04,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2021-07-09 17:09:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:09:04,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:04,440 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:04,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:09:04,653 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:04,654 INFO L82 PathProgramCache]: Analyzing trace with hash -910224837, now seen corresponding path program 1 times [2021-07-09 17:09:04,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:04,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426370700] [2021-07-09 17:09:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:04,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426370700] [2021-07-09 17:09:04,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426370700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:04,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530813820] [2021-07-09 17:09:04,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:05,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530813820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:05,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:05,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:09:05,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922916816] [2021-07-09 17:09:05,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:05,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:05,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:05,062 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:05,567 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2021-07-09 17:09:05,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:09:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:09:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:05,579 INFO L225 Difference]: With dead ends: 1656 [2021-07-09 17:09:05,579 INFO L226 Difference]: Without dead ends: 1415 [2021-07-09 17:09:05,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-07-09 17:09:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2021-07-09 17:09:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2021-07-09 17:09:05,615 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2021-07-09 17:09:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:05,616 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2021-07-09 17:09:05,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2021-07-09 17:09:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:09:05,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:05,620 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:05,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:05,825 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1302877552, now seen corresponding path program 1 times [2021-07-09 17:09:05,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:05,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814898861] [2021-07-09 17:09:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:05,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:05,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814898861] [2021-07-09 17:09:05,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814898861] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:05,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:05,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:05,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372001957] [2021-07-09 17:09:05,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:05,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:05,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:05,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:05,914 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:06,026 INFO L93 Difference]: Finished difference Result 1343 states and 4620 transitions. [2021-07-09 17:09:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:09:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:06,034 INFO L225 Difference]: With dead ends: 1343 [2021-07-09 17:09:06,035 INFO L226 Difference]: Without dead ends: 1119 [2021-07-09 17:09:06,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-09 17:09:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 792. [2021-07-09 17:09:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4829329962073325) internal successors, (2755), 791 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2755 transitions. [2021-07-09 17:09:06,067 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2755 transitions. Word has length 18 [2021-07-09 17:09:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:06,068 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2755 transitions. [2021-07-09 17:09:06,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2755 transitions. [2021-07-09 17:09:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:09:06,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:06,072 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:06,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 17:09:06,072 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:06,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1936831982, now seen corresponding path program 2 times [2021-07-09 17:09:06,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:06,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568964327] [2021-07-09 17:09:06,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:06,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:06,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568964327] [2021-07-09 17:09:06,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568964327] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:06,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:06,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:06,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135241242] [2021-07-09 17:09:06,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:06,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:06,149 INFO L87 Difference]: Start difference. First operand 792 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:06,239 INFO L93 Difference]: Finished difference Result 1367 states and 4635 transitions. [2021-07-09 17:09:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:09:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:06,248 INFO L225 Difference]: With dead ends: 1367 [2021-07-09 17:09:06,248 INFO L226 Difference]: Without dead ends: 1199 [2021-07-09 17:09:06,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-07-09 17:09:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 810. [2021-07-09 17:09:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4561186650185416) internal successors, (2796), 809 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2796 transitions. [2021-07-09 17:09:06,280 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2796 transitions. Word has length 18 [2021-07-09 17:09:06,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:06,281 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2796 transitions. [2021-07-09 17:09:06,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,282 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2796 transitions. [2021-07-09 17:09:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:09:06,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:06,285 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:06,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:09:06,285 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1545690414, now seen corresponding path program 2 times [2021-07-09 17:09:06,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:06,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322362165] [2021-07-09 17:09:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:06,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:06,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322362165] [2021-07-09 17:09:06,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322362165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:06,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430495230] [2021-07-09 17:09:06,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:06,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:06,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:06,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:06,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430495230] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:06,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:09:06,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-07-09 17:09:06,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000413033] [2021-07-09 17:09:06,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:06,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:06,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:06,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:06,560 INFO L87 Difference]: Start difference. First operand 810 states and 2796 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:06,786 INFO L93 Difference]: Finished difference Result 1377 states and 4559 transitions. [2021-07-09 17:09:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:09:06,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:06,795 INFO L225 Difference]: With dead ends: 1377 [2021-07-09 17:09:06,795 INFO L226 Difference]: Without dead ends: 1220 [2021-07-09 17:09:06,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-07-09 17:09:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 804. [2021-07-09 17:09:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.460772104607721) internal successors, (2779), 803 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2779 transitions. [2021-07-09 17:09:06,873 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2779 transitions. Word has length 18 [2021-07-09 17:09:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:06,873 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2779 transitions. [2021-07-09 17:09:06,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2779 transitions. [2021-07-09 17:09:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:09:06,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:06,876 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:07,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:07,100 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash -678642568, now seen corresponding path program 3 times [2021-07-09 17:09:07,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:07,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750650843] [2021-07-09 17:09:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:07,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:07,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750650843] [2021-07-09 17:09:07,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750650843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:07,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720364559] [2021-07-09 17:09:07,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:07,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:09:07,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:07,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720364559] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:07,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:09:07,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-07-09 17:09:07,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983254966] [2021-07-09 17:09:07,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:07,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:07,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:07,276 INFO L87 Difference]: Start difference. First operand 804 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:07,487 INFO L93 Difference]: Finished difference Result 1697 states and 5759 transitions. [2021-07-09 17:09:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:07,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:09:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:07,498 INFO L225 Difference]: With dead ends: 1697 [2021-07-09 17:09:07,499 INFO L226 Difference]: Without dead ends: 1614 [2021-07-09 17:09:07,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-09 17:09:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 817. [2021-07-09 17:09:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.450980392156863) internal successors, (2816), 816 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2816 transitions. [2021-07-09 17:09:07,535 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2816 transitions. Word has length 18 [2021-07-09 17:09:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:07,535 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2816 transitions. [2021-07-09 17:09:07,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2816 transitions. [2021-07-09 17:09:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 17:09:07,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:07,538 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:07,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:07,753 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:07,753 INFO L82 PathProgramCache]: Analyzing trace with hash -437071600, now seen corresponding path program 4 times [2021-07-09 17:09:07,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:07,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821065029] [2021-07-09 17:09:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:07,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821065029] [2021-07-09 17:09:07,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821065029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853946362] [2021-07-09 17:09:07,797 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:07,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:07,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:07,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:09:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:07,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853946362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:07,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:07,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-09 17:09:07,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437582287] [2021-07-09 17:09:07,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:07,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:07,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:07,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:07,927 INFO L87 Difference]: Start difference. First operand 817 states and 2816 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:08,088 INFO L93 Difference]: Finished difference Result 1418 states and 4750 transitions. [2021-07-09 17:09:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 17:09:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:08,097 INFO L225 Difference]: With dead ends: 1418 [2021-07-09 17:09:08,097 INFO L226 Difference]: Without dead ends: 1116 [2021-07-09 17:09:08,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-09 17:09:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 707. [2021-07-09 17:09:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.4674220963172804) internal successors, (2448), 706 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2448 transitions. [2021-07-09 17:09:08,126 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2448 transitions. Word has length 18 [2021-07-09 17:09:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:08,126 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2448 transitions. [2021-07-09 17:09:08,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2448 transitions. [2021-07-09 17:09:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:09:08,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:08,129 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:08,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:08,345 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash -517394769, now seen corresponding path program 1 times [2021-07-09 17:09:08,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:08,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457134107] [2021-07-09 17:09:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:08,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:08,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457134107] [2021-07-09 17:09:08,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457134107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:08,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198596178] [2021-07-09 17:09:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:08,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:09:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:08,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:08,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:08,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:08,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:08,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:09:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:08,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198596178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:08,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:08,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 17:09:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782222973] [2021-07-09 17:09:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:08,548 INFO L87 Difference]: Start difference. First operand 707 states and 2448 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:09,553 INFO L93 Difference]: Finished difference Result 3825 states and 12801 transitions. [2021-07-09 17:09:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:09:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 21 [2021-07-09 17:09:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:09,575 INFO L225 Difference]: With dead ends: 3825 [2021-07-09 17:09:09,575 INFO L226 Difference]: Without dead ends: 3619 [2021-07-09 17:09:09,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:09:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-07-09 17:09:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 1302. [2021-07-09 17:09:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.6541122213681785) internal successors, (4754), 1301 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4754 transitions. [2021-07-09 17:09:09,651 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4754 transitions. Word has length 21 [2021-07-09 17:09:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:09,651 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4754 transitions. [2021-07-09 17:09:09,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4754 transitions. [2021-07-09 17:09:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:09:09,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:09,655 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:09,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:09,880 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1831057363, now seen corresponding path program 1 times [2021-07-09 17:09:09,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:09,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514488060] [2021-07-09 17:09:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:09,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:09,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514488060] [2021-07-09 17:09:09,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514488060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:09,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646209767] [2021-07-09 17:09:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:09,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:09:09,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646209767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:10,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:10,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-09 17:09:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240385422] [2021-07-09 17:09:10,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:10,062 INFO L87 Difference]: Start difference. First operand 1302 states and 4754 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:10,978 INFO L93 Difference]: Finished difference Result 3835 states and 12901 transitions. [2021-07-09 17:09:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:09:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 21 [2021-07-09 17:09:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:10,998 INFO L225 Difference]: With dead ends: 3835 [2021-07-09 17:09:10,999 INFO L226 Difference]: Without dead ends: 3583 [2021-07-09 17:09:10,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:09:11,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-07-09 17:09:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 1499. [2021-07-09 17:09:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.6348464619492655) internal successors, (5445), 1498 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) [2021-07-09 17:09:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5445 transitions. [2021-07-09 17:09:11,067 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5445 transitions. Word has length 21 [2021-07-09 17:09:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:11,067 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5445 transitions. [2021-07-09 17:09:11,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5445 transitions. [2021-07-09 17:09:11,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:09:11,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:11,072 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:11,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:09:11,293 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1851685711, now seen corresponding path program 2 times [2021-07-09 17:09:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:11,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210887885] [2021-07-09 17:09:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:11,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210887885] [2021-07-09 17:09:11,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210887885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:11,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401518851] [2021-07-09 17:09:11,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:11,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:11,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:11,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:09:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:11,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401518851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:11,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:11,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 17:09:11,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000585934] [2021-07-09 17:09:11,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:11,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:11,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:11,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:11,432 INFO L87 Difference]: Start difference. First operand 1499 states and 5445 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:11,679 INFO L93 Difference]: Finished difference Result 2934 states and 10298 transitions. [2021-07-09 17:09:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:11,680 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:09:11,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:11,697 INFO L225 Difference]: With dead ends: 2934 [2021-07-09 17:09:11,697 INFO L226 Difference]: Without dead ends: 2934 [2021-07-09 17:09:11,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-09 17:09:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1307. [2021-07-09 17:09:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.627105666156202) internal successors, (4737), 1306 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4737 transitions. [2021-07-09 17:09:11,745 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4737 transitions. Word has length 21 [2021-07-09 17:09:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:11,746 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4737 transitions. [2021-07-09 17:09:11,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4737 transitions. [2021-07-09 17:09:11,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:09:11,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:11,751 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:11,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 17:09:11,965 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1702251995, now seen corresponding path program 3 times [2021-07-09 17:09:11,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:11,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789741294] [2021-07-09 17:09:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:11,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:11,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789741294] [2021-07-09 17:09:11,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789741294] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:11,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:11,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:11,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926939310] [2021-07-09 17:09:12,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:12,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:12,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:12,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:12,001 INFO L87 Difference]: Start difference. First operand 1307 states and 4737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:12,091 INFO L93 Difference]: Finished difference Result 2081 states and 7468 transitions. [2021-07-09 17:09:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:12,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:09:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:12,099 INFO L225 Difference]: With dead ends: 2081 [2021-07-09 17:09:12,099 INFO L226 Difference]: Without dead ends: 2063 [2021-07-09 17:09:12,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-07-09 17:09:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1303. [2021-07-09 17:09:12,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.6267281105990783) internal successors, (4722), 1302 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4722 transitions. [2021-07-09 17:09:12,141 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4722 transitions. Word has length 21 [2021-07-09 17:09:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:12,141 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4722 transitions. [2021-07-09 17:09:12,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4722 transitions. [2021-07-09 17:09:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:09:12,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:12,145 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:12,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 17:09:12,145 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2028027159, now seen corresponding path program 2 times [2021-07-09 17:09:12,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:12,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983203411] [2021-07-09 17:09:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:12,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:12,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983203411] [2021-07-09 17:09:12,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983203411] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:12,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:12,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405411463] [2021-07-09 17:09:12,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:12,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:12,173 INFO L87 Difference]: Start difference. First operand 1303 states and 4722 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:12,257 INFO L93 Difference]: Finished difference Result 2051 states and 7360 transitions. [2021-07-09 17:09:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:12,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:09:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:12,265 INFO L225 Difference]: With dead ends: 2051 [2021-07-09 17:09:12,266 INFO L226 Difference]: Without dead ends: 2045 [2021-07-09 17:09:12,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:12,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-07-09 17:09:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1327. [2021-07-09 17:09:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.6093514328808447) internal successors, (4786), 1326 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4786 transitions. [2021-07-09 17:09:12,307 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4786 transitions. Word has length 21 [2021-07-09 17:09:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4786 transitions. [2021-07-09 17:09:12,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4786 transitions. [2021-07-09 17:09:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:09:12,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:12,312 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:12,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-09 17:09:12,312 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:12,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312109, now seen corresponding path program 4 times [2021-07-09 17:09:12,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:12,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192444746] [2021-07-09 17:09:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:12,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:12,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192444746] [2021-07-09 17:09:12,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192444746] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:12,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:12,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:12,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575131874] [2021-07-09 17:09:12,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:12,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:12,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:12,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:12,351 INFO L87 Difference]: Start difference. First operand 1327 states and 4786 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:12,426 INFO L93 Difference]: Finished difference Result 1854 states and 6806 transitions. [2021-07-09 17:09:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 17:09:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:12,455 INFO L225 Difference]: With dead ends: 1854 [2021-07-09 17:09:12,455 INFO L226 Difference]: Without dead ends: 1840 [2021-07-09 17:09:12,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-07-09 17:09:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1265. [2021-07-09 17:09:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.6360759493670884) internal successors, (4596), 1264 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4596 transitions. [2021-07-09 17:09:12,493 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4596 transitions. Word has length 21 [2021-07-09 17:09:12,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:12,493 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4596 transitions. [2021-07-09 17:09:12,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4596 transitions. [2021-07-09 17:09:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:12,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:12,497 INFO L508 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] [2021-07-09 17:09:12,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-09 17:09:12,497 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1455380781, now seen corresponding path program 1 times [2021-07-09 17:09:12,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:12,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519144479] [2021-07-09 17:09:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:12,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:12,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519144479] [2021-07-09 17:09:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519144479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:12,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783114701] [2021-07-09 17:09:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:12,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783114701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:12,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:12,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 17:09:12,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58848228] [2021-07-09 17:09:12,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:09:12,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:09:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:12,754 INFO L87 Difference]: Start difference. First operand 1265 states and 4596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-07-09 17:09:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:13,169 INFO L93 Difference]: Finished difference Result 3756 states and 13001 transitions. [2021-07-09 17:09:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 24 [2021-07-09 17:09:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:13,180 INFO L225 Difference]: With dead ends: 3756 [2021-07-09 17:09:13,180 INFO L226 Difference]: Without dead ends: 3032 [2021-07-09 17:09:13,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-07-09 17:09:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2042. [2021-07-09 17:09:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 3.724154826065654) internal successors, (7601), 2041 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7601 transitions. [2021-07-09 17:09:13,283 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7601 transitions. Word has length 24 [2021-07-09 17:09:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:13,284 INFO L482 AbstractCegarLoop]: Abstraction has 2042 states and 7601 transitions. [2021-07-09 17:09:13,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-07-09 17:09:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7601 transitions. [2021-07-09 17:09:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:13,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:13,291 INFO L508 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] [2021-07-09 17:09:13,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:09:13,505 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:13,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2096711821, now seen corresponding path program 2 times [2021-07-09 17:09:13,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:13,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763594313] [2021-07-09 17:09:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:13,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:13,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763594313] [2021-07-09 17:09:13,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763594313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:13,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111283295] [2021-07-09 17:09:13,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:13,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:13,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111283295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:13,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:13,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 17:09:13,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848603549] [2021-07-09 17:09:13,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:09:13,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:13,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:09:13,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:13,768 INFO L87 Difference]: Start difference. First operand 2042 states and 7601 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-07-09 17:09:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:14,157 INFO L93 Difference]: Finished difference Result 3819 states and 13270 transitions. [2021-07-09 17:09:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:14,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 24 [2021-07-09 17:09:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:14,168 INFO L225 Difference]: With dead ends: 3819 [2021-07-09 17:09:14,168 INFO L226 Difference]: Without dead ends: 3419 [2021-07-09 17:09:14,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-07-09 17:09:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 2196. [2021-07-09 17:09:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.7599088838268795) internal successors, (8253), 2195 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8253 transitions. [2021-07-09 17:09:14,262 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8253 transitions. Word has length 24 [2021-07-09 17:09:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:14,263 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8253 transitions. [2021-07-09 17:09:14,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-07-09 17:09:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8253 transitions. [2021-07-09 17:09:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:14,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:14,271 INFO L508 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] [2021-07-09 17:09:14,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 17:09:14,494 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash -337245367, now seen corresponding path program 3 times [2021-07-09 17:09:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:14,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520289351] [2021-07-09 17:09:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:14,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:14,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520289351] [2021-07-09 17:09:14,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520289351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:14,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523284394] [2021-07-09 17:09:14,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:14,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:14,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:14,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:14,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523284394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:14,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:14,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 17:09:14,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297879571] [2021-07-09 17:09:14,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:09:14,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:14,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:09:14,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:14,736 INFO L87 Difference]: Start difference. First operand 2196 states and 8253 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-07-09 17:09:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:15,220 INFO L93 Difference]: Finished difference Result 4185 states and 15168 transitions. [2021-07-09 17:09:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:09:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 24 [2021-07-09 17:09:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:15,229 INFO L225 Difference]: With dead ends: 4185 [2021-07-09 17:09:15,230 INFO L226 Difference]: Without dead ends: 3585 [2021-07-09 17:09:15,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-07-09 17:09:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2406. [2021-07-09 17:09:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 3.761330561330561) internal successors, (9046), 2405 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 9046 transitions. [2021-07-09 17:09:15,322 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 9046 transitions. Word has length 24 [2021-07-09 17:09:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:15,323 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 9046 transitions. [2021-07-09 17:09:15,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2021-07-09 17:09:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 9046 transitions. [2021-07-09 17:09:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:15,330 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:15,331 INFO L508 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] [2021-07-09 17:09:15,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:09:15,545 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1257907469, now seen corresponding path program 1 times [2021-07-09 17:09:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:15,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769015942] [2021-07-09 17:09:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:15,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:15,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769015942] [2021-07-09 17:09:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769015942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:15,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923184274] [2021-07-09 17:09:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:15,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:15,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:15,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:15,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:15,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:15,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-09 17:09:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:15,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923184274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:15,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:15,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 17:09:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670428842] [2021-07-09 17:09:15,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:15,748 INFO L87 Difference]: Start difference. First operand 2406 states and 9046 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:16,009 INFO L93 Difference]: Finished difference Result 4184 states and 14954 transitions. [2021-07-09 17:09:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:16,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:09:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:16,018 INFO L225 Difference]: With dead ends: 4184 [2021-07-09 17:09:16,018 INFO L226 Difference]: Without dead ends: 3609 [2021-07-09 17:09:16,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-07-09 17:09:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2825. [2021-07-09 17:09:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 3.685198300283286) internal successors, (10407), 2824 states have internal predecessors, (10407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10407 transitions. [2021-07-09 17:09:16,092 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10407 transitions. Word has length 24 [2021-07-09 17:09:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:16,092 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10407 transitions. [2021-07-09 17:09:16,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10407 transitions. [2021-07-09 17:09:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:16,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:16,104 INFO L508 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] [2021-07-09 17:09:16,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:09:16,328 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:16,328 INFO L82 PathProgramCache]: Analyzing trace with hash -37818295, now seen corresponding path program 2 times [2021-07-09 17:09:16,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:16,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939605402] [2021-07-09 17:09:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:16,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:16,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939605402] [2021-07-09 17:09:16,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939605402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:16,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796137136] [2021-07-09 17:09:16,419 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:16,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:16,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:16,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:16,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:16,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:16,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:16,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:16,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-09 17:09:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:16,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796137136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:16,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:16,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 17:09:16,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723030364] [2021-07-09 17:09:16,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:16,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:16,547 INFO L87 Difference]: Start difference. First operand 2825 states and 10407 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:16,832 INFO L93 Difference]: Finished difference Result 4952 states and 17662 transitions. [2021-07-09 17:09:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:16,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 [2021-07-09 17:09:16,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:16,844 INFO L225 Difference]: With dead ends: 4952 [2021-07-09 17:09:16,844 INFO L226 Difference]: Without dead ends: 4907 [2021-07-09 17:09:16,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-07-09 17:09:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 3559. [2021-07-09 17:09:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 3.7141652613827993) internal successors, (13215), 3558 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 13215 transitions. [2021-07-09 17:09:16,935 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 13215 transitions. Word has length 24 [2021-07-09 17:09:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:16,936 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 13215 transitions. [2021-07-09 17:09:16,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 13215 transitions. [2021-07-09 17:09:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:16,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:16,946 INFO L508 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] [2021-07-09 17:09:17,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:17,161 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1702471575, now seen corresponding path program 1 times [2021-07-09 17:09:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:17,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477200348] [2021-07-09 17:09:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:17,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477200348] [2021-07-09 17:09:17,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477200348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401268069] [2021-07-09 17:09:17,377 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 [2021-07-09 17:09:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401268069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:17,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:09:17,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037171016] [2021-07-09 17:09:17,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:17,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:17,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:17,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:17,587 INFO L87 Difference]: Start difference. First operand 3559 states and 13215 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:17,817 INFO L93 Difference]: Finished difference Result 4119 states and 14931 transitions. [2021-07-09 17:09:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-07-09 17:09:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:17,826 INFO L225 Difference]: With dead ends: 4119 [2021-07-09 17:09:17,826 INFO L226 Difference]: Without dead ends: 3762 [2021-07-09 17:09:17,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-07-09 17:09:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3576. [2021-07-09 17:09:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 3.7023776223776226) internal successors, (13236), 3575 states have internal predecessors, (13236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 13236 transitions. [2021-07-09 17:09:17,906 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 13236 transitions. Word has length 24 [2021-07-09 17:09:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:17,906 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 13236 transitions. [2021-07-09 17:09:17,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 13236 transitions. [2021-07-09 17:09:17,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:17,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:17,916 INFO L508 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] [2021-07-09 17:09:18,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:18,133 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:18,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1483062673, now seen corresponding path program 2 times [2021-07-09 17:09:18,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:18,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245227204] [2021-07-09 17:09:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:18,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:18,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245227204] [2021-07-09 17:09:18,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245227204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80406345] [2021-07-09 17:09:18,278 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 [2021-07-09 17:09:18,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:18,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:18,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:18,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80406345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:18,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:09:18,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967601657] [2021-07-09 17:09:18,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:18,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:18,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:18,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:18,563 INFO L87 Difference]: Start difference. First operand 3576 states and 13236 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:18,858 INFO L93 Difference]: Finished difference Result 4175 states and 15081 transitions. [2021-07-09 17:09:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-07-09 17:09:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:18,869 INFO L225 Difference]: With dead ends: 4175 [2021-07-09 17:09:18,870 INFO L226 Difference]: Without dead ends: 3615 [2021-07-09 17:09:18,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-07-09 17:09:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3429. [2021-07-09 17:09:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.731330221703617) internal successors, (12791), 3428 states have internal predecessors, (12791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12791 transitions. [2021-07-09 17:09:18,945 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12791 transitions. Word has length 24 [2021-07-09 17:09:18,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:18,945 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12791 transitions. [2021-07-09 17:09:18,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:18,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12791 transitions. [2021-07-09 17:09:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:18,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:18,955 INFO L508 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] [2021-07-09 17:09:19,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 17:09:19,169 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -712088919, now seen corresponding path program 1 times [2021-07-09 17:09:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:19,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144776079] [2021-07-09 17:09:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:19,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:19,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144776079] [2021-07-09 17:09:19,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144776079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389184791] [2021-07-09 17:09:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 17:09:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:19,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:09:19,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:19,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389184791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:19,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 17:09:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443479479] [2021-07-09 17:09:19,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:19,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:19,409 INFO L87 Difference]: Start difference. First operand 3429 states and 12791 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2021-07-09 17:09:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:19,777 INFO L93 Difference]: Finished difference Result 4987 states and 17858 transitions. [2021-07-09 17:09:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:19,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 24 [2021-07-09 17:09:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:19,789 INFO L225 Difference]: With dead ends: 4987 [2021-07-09 17:09:19,789 INFO L226 Difference]: Without dead ends: 3821 [2021-07-09 17:09:19,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:19,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-07-09 17:09:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3319. [2021-07-09 17:09:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.648583484026522) internal successors, (12106), 3318 states have internal predecessors, (12106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 12106 transitions. [2021-07-09 17:09:19,877 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 12106 transitions. Word has length 24 [2021-07-09 17:09:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:19,877 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 12106 transitions. [2021-07-09 17:09:19,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2021-07-09 17:09:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 12106 transitions. [2021-07-09 17:09:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:19,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:19,887 INFO L508 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] [2021-07-09 17:09:20,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:20,112 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1948181261, now seen corresponding path program 1 times [2021-07-09 17:09:20,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:20,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248967273] [2021-07-09 17:09:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:20,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:20,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248967273] [2021-07-09 17:09:20,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248967273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141604860] [2021-07-09 17:09:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:20,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:20,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:20,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:20,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:09:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:20,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141604860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:20,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:09:20,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255666385] [2021-07-09 17:09:20,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:20,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:20,320 INFO L87 Difference]: Start difference. First operand 3319 states and 12106 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:20,568 INFO L93 Difference]: Finished difference Result 4339 states and 15458 transitions. [2021-07-09 17:09:20,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:20,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:09:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:20,580 INFO L225 Difference]: With dead ends: 4339 [2021-07-09 17:09:20,580 INFO L226 Difference]: Without dead ends: 4198 [2021-07-09 17:09:20,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-07-09 17:09:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3613. [2021-07-09 17:09:20,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 3.638704318936877) internal successors, (13143), 3612 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 13143 transitions. [2021-07-09 17:09:20,682 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 13143 transitions. Word has length 24 [2021-07-09 17:09:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:20,683 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 13143 transitions. [2021-07-09 17:09:20,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 13143 transitions. [2021-07-09 17:09:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:20,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:20,692 INFO L508 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] [2021-07-09 17:09:20,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:09:20,909 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1874823949, now seen corresponding path program 3 times [2021-07-09 17:09:20,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:20,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052714281] [2021-07-09 17:09:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:20,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052714281] [2021-07-09 17:09:20,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052714281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331632363] [2021-07-09 17:09:20,985 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 [2021-07-09 17:09:21,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 17:09:21,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:21,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:21,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:21,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:21,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:21,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-09 17:09:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:21,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331632363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:21,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 17:09:21,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892127521] [2021-07-09 17:09:21,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:21,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:21,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:21,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:21,093 INFO L87 Difference]: Start difference. First operand 3613 states and 13143 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:21,331 INFO L93 Difference]: Finished difference Result 4148 states and 14673 transitions. [2021-07-09 17:09:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:09:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:21,341 INFO L225 Difference]: With dead ends: 4148 [2021-07-09 17:09:21,342 INFO L226 Difference]: Without dead ends: 3464 [2021-07-09 17:09:21,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-07-09 17:09:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3015. [2021-07-09 17:09:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.6250829462508296) internal successors, (10926), 3014 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 10926 transitions. [2021-07-09 17:09:21,413 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 10926 transitions. Word has length 24 [2021-07-09 17:09:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:21,413 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 10926 transitions. [2021-07-09 17:09:21,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 10926 transitions. [2021-07-09 17:09:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:21,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:21,420 INFO L508 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] [2021-07-09 17:09:21,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 17:09:21,637 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:21,637 INFO L82 PathProgramCache]: Analyzing trace with hash -853710037, now seen corresponding path program 4 times [2021-07-09 17:09:21,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:21,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657248044] [2021-07-09 17:09:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:21,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657248044] [2021-07-09 17:09:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657248044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278949065] [2021-07-09 17:09:21,703 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 [2021-07-09 17:09:21,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:21,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:21,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:21,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:21,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:21,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:21,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:21,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:09:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:21,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278949065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:21,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:09:21,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466142907] [2021-07-09 17:09:21,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:21,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:21,866 INFO L87 Difference]: Start difference. First operand 3015 states and 10926 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:22,080 INFO L93 Difference]: Finished difference Result 3294 states and 11794 transitions. [2021-07-09 17:09:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:09:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:22,089 INFO L225 Difference]: With dead ends: 3294 [2021-07-09 17:09:22,089 INFO L226 Difference]: Without dead ends: 3294 [2021-07-09 17:09:22,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-07-09 17:09:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3106. [2021-07-09 17:09:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 3.61256038647343) internal successors, (11217), 3105 states have internal predecessors, (11217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 11217 transitions. [2021-07-09 17:09:22,151 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 11217 transitions. Word has length 24 [2021-07-09 17:09:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:22,151 INFO L482 AbstractCegarLoop]: Abstraction has 3106 states and 11217 transitions. [2021-07-09 17:09:22,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 11217 transitions. [2021-07-09 17:09:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:22,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:22,159 INFO L508 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] [2021-07-09 17:09:22,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:09:22,360 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1540696521, now seen corresponding path program 5 times [2021-07-09 17:09:22,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:22,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394398935] [2021-07-09 17:09:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:22,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:22,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394398935] [2021-07-09 17:09:22,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394398935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:22,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61608340] [2021-07-09 17:09:22,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:22,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:09:22,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:22,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:22,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:22,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:22,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:22,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:22,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-09 17:09:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:22,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61608340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:22,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:22,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 17:09:22,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709402965] [2021-07-09 17:09:22,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:22,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:22,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:22,521 INFO L87 Difference]: Start difference. First operand 3106 states and 11217 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:22,747 INFO L93 Difference]: Finished difference Result 4306 states and 15126 transitions. [2021-07-09 17:09:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 [2021-07-09 17:09:22,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:22,757 INFO L225 Difference]: With dead ends: 4306 [2021-07-09 17:09:22,757 INFO L226 Difference]: Without dead ends: 4306 [2021-07-09 17:09:22,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-07-09 17:09:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3262. [2021-07-09 17:09:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 3.609015639374425) internal successors, (11769), 3261 states have internal predecessors, (11769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 11769 transitions. [2021-07-09 17:09:22,821 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 11769 transitions. Word has length 24 [2021-07-09 17:09:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:22,821 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 11769 transitions. [2021-07-09 17:09:22,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 11769 transitions. [2021-07-09 17:09:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:22,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:22,831 INFO L508 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] [2021-07-09 17:09:23,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:09:23,032 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:23,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617495, now seen corresponding path program 3 times [2021-07-09 17:09:23,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:23,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574610929] [2021-07-09 17:09:23,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:23,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:23,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574610929] [2021-07-09 17:09:23,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574610929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666565525] [2021-07-09 17:09:23,238 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 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 [2021-07-09 17:09:23,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:23,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:23,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:23,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666565525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:23,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:09:23,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566381051] [2021-07-09 17:09:23,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:23,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:23,438 INFO L87 Difference]: Start difference. First operand 3262 states and 11769 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:23,745 INFO L93 Difference]: Finished difference Result 3881 states and 13726 transitions. [2021-07-09 17:09:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-07-09 17:09:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:23,753 INFO L225 Difference]: With dead ends: 3881 [2021-07-09 17:09:23,754 INFO L226 Difference]: Without dead ends: 3516 [2021-07-09 17:09:23,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-07-09 17:09:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3289. [2021-07-09 17:09:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3288 states have (on average 3.602493917274939) internal successors, (11845), 3288 states have internal predecessors, (11845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 11845 transitions. [2021-07-09 17:09:23,812 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 11845 transitions. Word has length 24 [2021-07-09 17:09:23,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:23,812 INFO L482 AbstractCegarLoop]: Abstraction has 3289 states and 11845 transitions. [2021-07-09 17:09:23,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 11845 transitions. [2021-07-09 17:09:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:23,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:23,820 INFO L508 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] [2021-07-09 17:09:24,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:09:24,021 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:24,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:24,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2129098641, now seen corresponding path program 6 times [2021-07-09 17:09:24,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:24,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810778535] [2021-07-09 17:09:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:24,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:24,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810778535] [2021-07-09 17:09:24,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810778535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603610836] [2021-07-09 17:09:24,084 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 [2021-07-09 17:09:24,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:09:24,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:24,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:24,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:24,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:24,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:24,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:24,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:09:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:24,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603610836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:24,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:09:24,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440790679] [2021-07-09 17:09:24,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:24,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:24,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:24,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:24,173 INFO L87 Difference]: Start difference. First operand 3289 states and 11845 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-07-09 17:09:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:24,384 INFO L93 Difference]: Finished difference Result 3630 states and 12852 transitions. [2021-07-09 17:09:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 24 [2021-07-09 17:09:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:24,393 INFO L225 Difference]: With dead ends: 3630 [2021-07-09 17:09:24,393 INFO L226 Difference]: Without dead ends: 3630 [2021-07-09 17:09:24,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-07-09 17:09:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3263. [2021-07-09 17:09:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.600551808706315) internal successors, (11745), 3262 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11745 transitions. [2021-07-09 17:09:24,457 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11745 transitions. Word has length 24 [2021-07-09 17:09:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:24,457 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 11745 transitions. [2021-07-09 17:09:24,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-07-09 17:09:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11745 transitions. [2021-07-09 17:09:24,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:24,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:24,466 INFO L508 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] [2021-07-09 17:09:24,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:24,666 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:24,667 INFO L82 PathProgramCache]: Analyzing trace with hash -533600713, now seen corresponding path program 2 times [2021-07-09 17:09:24,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:24,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65335592] [2021-07-09 17:09:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:24,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:24,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65335592] [2021-07-09 17:09:24,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65335592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700499299] [2021-07-09 17:09:24,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:24,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:24,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:24,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:24,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:24,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:24,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:24,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-09 17:09:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:24,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700499299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:24,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 17:09:24,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119961085] [2021-07-09 17:09:24,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:24,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:24,895 INFO L87 Difference]: Start difference. First operand 3263 states and 11745 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:25,114 INFO L93 Difference]: Finished difference Result 3854 states and 13464 transitions. [2021-07-09 17:09:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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 [2021-07-09 17:09:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:25,123 INFO L225 Difference]: With dead ends: 3854 [2021-07-09 17:09:25,124 INFO L226 Difference]: Without dead ends: 3810 [2021-07-09 17:09:25,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-07-09 17:09:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3156. [2021-07-09 17:09:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.5984152139461174) internal successors, (11353), 3155 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 11353 transitions. [2021-07-09 17:09:25,189 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 11353 transitions. Word has length 24 [2021-07-09 17:09:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:25,189 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 11353 transitions. [2021-07-09 17:09:25,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 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) [2021-07-09 17:09:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 11353 transitions. [2021-07-09 17:09:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:25,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:25,196 INFO L508 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] [2021-07-09 17:09:25,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:09:25,404 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:25,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1862582325, now seen corresponding path program 3 times [2021-07-09 17:09:25,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:25,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557490821] [2021-07-09 17:09:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:25,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557490821] [2021-07-09 17:09:25,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557490821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28987163] [2021-07-09 17:09:25,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:25,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:25,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:25,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:25,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:25,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:25,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:25,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:25,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:25,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:09:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28987163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:09:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960158521] [2021-07-09 17:09:25,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:25,543 INFO L87 Difference]: Start difference. First operand 3156 states and 11353 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:25,761 INFO L93 Difference]: Finished difference Result 3384 states and 11803 transitions. [2021-07-09 17:09:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 17:09:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:25,769 INFO L225 Difference]: With dead ends: 3384 [2021-07-09 17:09:25,769 INFO L226 Difference]: Without dead ends: 3321 [2021-07-09 17:09:25,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-07-09 17:09:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2530. [2021-07-09 17:09:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.593910636615263) internal successors, (9089), 2529 states have internal predecessors, (9089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9089 transitions. [2021-07-09 17:09:25,819 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9089 transitions. Word has length 24 [2021-07-09 17:09:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:25,820 INFO L482 AbstractCegarLoop]: Abstraction has 2530 states and 9089 transitions. [2021-07-09 17:09:25,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9089 transitions. [2021-07-09 17:09:25,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:25,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:25,825 INFO L508 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] [2021-07-09 17:09:26,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:26,029 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash 316647389, now seen corresponding path program 4 times [2021-07-09 17:09:26,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:26,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266277153] [2021-07-09 17:09:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:26,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266277153] [2021-07-09 17:09:26,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266277153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:26,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761092652] [2021-07-09 17:09:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:26,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:26,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:26,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:26,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:26,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761092652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:26,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:26,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:09:26,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110584121] [2021-07-09 17:09:26,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:26,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:26,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:26,328 INFO L87 Difference]: Start difference. First operand 2530 states and 9089 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:26,747 INFO L93 Difference]: Finished difference Result 3403 states and 11831 transitions. [2021-07-09 17:09:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:26,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-07-09 17:09:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:26,755 INFO L225 Difference]: With dead ends: 3403 [2021-07-09 17:09:26,756 INFO L226 Difference]: Without dead ends: 2711 [2021-07-09 17:09:26,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-07-09 17:09:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2524. [2021-07-09 17:09:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 3.594926674593738) internal successors, (9070), 2523 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 9070 transitions. [2021-07-09 17:09:26,816 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 9070 transitions. Word has length 24 [2021-07-09 17:09:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:26,817 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 9070 transitions. [2021-07-09 17:09:26,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 9070 transitions. [2021-07-09 17:09:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 17:09:26,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:26,823 INFO L508 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] [2021-07-09 17:09:27,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:09:27,043 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:27,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2118036169, now seen corresponding path program 5 times [2021-07-09 17:09:27,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:27,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828507169] [2021-07-09 17:09:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:27,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:27,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828507169] [2021-07-09 17:09:27,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828507169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:27,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734887995] [2021-07-09 17:09:27,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:27,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:27,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734887995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:27,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:27,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:09:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982082193] [2021-07-09 17:09:27,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:27,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:27,441 INFO L87 Difference]: Start difference. First operand 2524 states and 9070 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:27,900 INFO L93 Difference]: Finished difference Result 3698 states and 12705 transitions. [2021-07-09 17:09:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:27,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 24 [2021-07-09 17:09:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:27,907 INFO L225 Difference]: With dead ends: 3698 [2021-07-09 17:09:27,907 INFO L226 Difference]: Without dead ends: 2495 [2021-07-09 17:09:27,907 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-07-09 17:09:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2347. [2021-07-09 17:09:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.6027280477408357) internal successors, (8452), 2346 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8452 transitions. [2021-07-09 17:09:27,947 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8452 transitions. Word has length 24 [2021-07-09 17:09:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:27,947 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8452 transitions. [2021-07-09 17:09:27,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:09:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8452 transitions. [2021-07-09 17:09:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:27,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:27,952 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:28,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:28,152 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash -579383647, now seen corresponding path program 4 times [2021-07-09 17:09:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:28,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848402254] [2021-07-09 17:09:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:28,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:28,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848402254] [2021-07-09 17:09:28,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848402254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608087827] [2021-07-09 17:09:28,197 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:28,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:28,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:28,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:28,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608087827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:28,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:09:28,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921687473] [2021-07-09 17:09:28,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:28,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:28,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:28,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:28,331 INFO L87 Difference]: Start difference. First operand 2347 states and 8452 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:28,550 INFO L93 Difference]: Finished difference Result 7003 states and 24374 transitions. [2021-07-09 17:09:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:09:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:28,568 INFO L225 Difference]: With dead ends: 7003 [2021-07-09 17:09:28,568 INFO L226 Difference]: Without dead ends: 6243 [2021-07-09 17:09:28,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-07-09 17:09:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3941. [2021-07-09 17:09:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 3.7758883248730966) internal successors, (14877), 3940 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 14877 transitions. [2021-07-09 17:09:28,714 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 14877 transitions. Word has length 27 [2021-07-09 17:09:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:28,714 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 14877 transitions. [2021-07-09 17:09:28,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 14877 transitions. [2021-07-09 17:09:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:28,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:28,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:28,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:09:28,924 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash 755204605, now seen corresponding path program 1 times [2021-07-09 17:09:28,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:28,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252350193] [2021-07-09 17:09:28,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:28,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:28,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252350193] [2021-07-09 17:09:28,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252350193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736561645] [2021-07-09 17:09:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:29,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:29,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:29,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:29,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:29,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:29,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:09:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:29,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736561645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:29,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:09:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951233662] [2021-07-09 17:09:29,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:29,096 INFO L87 Difference]: Start difference. First operand 3941 states and 14877 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:29,289 INFO L93 Difference]: Finished difference Result 5052 states and 18543 transitions. [2021-07-09 17:09:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 27 [2021-07-09 17:09:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:29,302 INFO L225 Difference]: With dead ends: 5052 [2021-07-09 17:09:29,302 INFO L226 Difference]: Without dead ends: 4862 [2021-07-09 17:09:29,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-07-09 17:09:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4231. [2021-07-09 17:09:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.753900709219858) internal successors, (15879), 4230 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 15879 transitions. [2021-07-09 17:09:29,413 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 15879 transitions. Word has length 27 [2021-07-09 17:09:29,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:29,413 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 15879 transitions. [2021-07-09 17:09:29,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:29,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 15879 transitions. [2021-07-09 17:09:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:29,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:29,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:29,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:29,645 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1627375381, now seen corresponding path program 5 times [2021-07-09 17:09:29,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:29,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581390155] [2021-07-09 17:09:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:29,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581390155] [2021-07-09 17:09:29,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581390155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010658989] [2021-07-09 17:09:29,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:29,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:29,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:29,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:29,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010658989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:29,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-09 17:09:29,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792147724] [2021-07-09 17:09:29,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:29,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:29,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:29,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:29,809 INFO L87 Difference]: Start difference. First operand 4231 states and 15879 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-07-09 17:09:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:29,989 INFO L93 Difference]: Finished difference Result 6079 states and 21441 transitions. [2021-07-09 17:09:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 27 [2021-07-09 17:09:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:30,003 INFO L225 Difference]: With dead ends: 6079 [2021-07-09 17:09:30,004 INFO L226 Difference]: Without dead ends: 5466 [2021-07-09 17:09:30,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-07-09 17:09:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4109. [2021-07-09 17:09:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 3.7458617332035056) internal successors, (15388), 4108 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 15388 transitions. [2021-07-09 17:09:30,139 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 15388 transitions. Word has length 27 [2021-07-09 17:09:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:30,140 INFO L482 AbstractCegarLoop]: Abstraction has 4109 states and 15388 transitions. [2021-07-09 17:09:30,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-07-09 17:09:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 15388 transitions. [2021-07-09 17:09:30,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:30,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:30,148 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:30,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:09:30,348 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1329916833, now seen corresponding path program 6 times [2021-07-09 17:09:30,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:30,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619611111] [2021-07-09 17:09:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:30,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:30,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619611111] [2021-07-09 17:09:30,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619611111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:30,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380690795] [2021-07-09 17:09:30,383 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:30,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:09:30,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:30,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380690795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:30,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:30,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-09 17:09:30,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040272531] [2021-07-09 17:09:30,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:30,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:30,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:30,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:30,469 INFO L87 Difference]: Start difference. First operand 4109 states and 15388 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:30,635 INFO L93 Difference]: Finished difference Result 8656 states and 31846 transitions. [2021-07-09 17:09:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:09:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:30,667 INFO L225 Difference]: With dead ends: 8656 [2021-07-09 17:09:30,667 INFO L226 Difference]: Without dead ends: 8340 [2021-07-09 17:09:30,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-07-09 17:09:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 5370. [2021-07-09 17:09:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.8379586515179738) internal successors, (20606), 5369 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 20606 transitions. [2021-07-09 17:09:30,835 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 20606 transitions. Word has length 27 [2021-07-09 17:09:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:30,835 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 20606 transitions. [2021-07-09 17:09:30,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 20606 transitions. [2021-07-09 17:09:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:30,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:30,848 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:31,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:31,072 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1648096775, now seen corresponding path program 7 times [2021-07-09 17:09:31,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:31,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403739862] [2021-07-09 17:09:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:31,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403739862] [2021-07-09 17:09:31,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403739862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283360706] [2021-07-09 17:09:31,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:31,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283360706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:31,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-09 17:09:31,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485749820] [2021-07-09 17:09:31,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:31,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:31,209 INFO L87 Difference]: Start difference. First operand 5370 states and 20606 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:31,355 INFO L93 Difference]: Finished difference Result 8619 states and 31580 transitions. [2021-07-09 17:09:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:31,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:09:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:31,385 INFO L225 Difference]: With dead ends: 8619 [2021-07-09 17:09:31,385 INFO L226 Difference]: Without dead ends: 8251 [2021-07-09 17:09:31,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-07-09 17:09:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 5352. [2021-07-09 17:09:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.834984115118669) internal successors, (20521), 5351 states have internal predecessors, (20521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 20521 transitions. [2021-07-09 17:09:31,582 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 20521 transitions. Word has length 27 [2021-07-09 17:09:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:31,582 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 20521 transitions. [2021-07-09 17:09:31,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 20521 transitions. [2021-07-09 17:09:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:31,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:31,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:31,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:09:31,794 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:31,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:31,794 INFO L82 PathProgramCache]: Analyzing trace with hash 888507809, now seen corresponding path program 8 times [2021-07-09 17:09:31,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:31,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992804760] [2021-07-09 17:09:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:31,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:31,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992804760] [2021-07-09 17:09:31,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992804760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266926829] [2021-07-09 17:09:31,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:31,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:31,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266926829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:31,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:09:31,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88410514] [2021-07-09 17:09:31,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:31,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:31,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:31,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:31,961 INFO L87 Difference]: Start difference. First operand 5352 states and 20521 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-07-09 17:09:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:32,108 INFO L93 Difference]: Finished difference Result 8299 states and 30586 transitions. [2021-07-09 17:09:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 27 [2021-07-09 17:09:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:32,134 INFO L225 Difference]: With dead ends: 8299 [2021-07-09 17:09:32,134 INFO L226 Difference]: Without dead ends: 7871 [2021-07-09 17:09:32,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-07-09 17:09:32,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5590. [2021-07-09 17:09:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5589 states have (on average 3.8017534442655214) internal successors, (21248), 5589 states have internal predecessors, (21248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 21248 transitions. [2021-07-09 17:09:32,255 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 21248 transitions. Word has length 27 [2021-07-09 17:09:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:32,255 INFO L482 AbstractCegarLoop]: Abstraction has 5590 states and 21248 transitions. [2021-07-09 17:09:32,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2021-07-09 17:09:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 21248 transitions. [2021-07-09 17:09:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:32,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:32,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:32,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:09:32,466 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1554761067, now seen corresponding path program 2 times [2021-07-09 17:09:32,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:32,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214595766] [2021-07-09 17:09:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:32,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:32,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214595766] [2021-07-09 17:09:32,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214595766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670247766] [2021-07-09 17:09:32,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:32,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:32,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:32,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:32,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:32,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:32,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:32,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:32,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:32,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-09 17:09:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670247766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:32,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 17:09:32,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142837046] [2021-07-09 17:09:32,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:32,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:32,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:32,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:32,610 INFO L87 Difference]: Start difference. First operand 5590 states and 21248 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-07-09 17:09:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:32,771 INFO L93 Difference]: Finished difference Result 5588 states and 20704 transitions. [2021-07-09 17:09:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:09:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:32,785 INFO L225 Difference]: With dead ends: 5588 [2021-07-09 17:09:32,785 INFO L226 Difference]: Without dead ends: 5117 [2021-07-09 17:09:32,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-09 17:09:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4893. [2021-07-09 17:09:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 3.8068274734260017) internal successors, (18623), 4892 states have internal predecessors, (18623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 18623 transitions. [2021-07-09 17:09:32,923 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 18623 transitions. Word has length 27 [2021-07-09 17:09:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:32,923 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 18623 transitions. [2021-07-09 17:09:32,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-07-09 17:09:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 18623 transitions. [2021-07-09 17:09:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:32,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:32,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:33,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:09:33,134 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:33,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1455495413, now seen corresponding path program 3 times [2021-07-09 17:09:33,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:33,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340710248] [2021-07-09 17:09:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:33,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:33,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340710248] [2021-07-09 17:09:33,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340710248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878460018] [2021-07-09 17:09:33,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:33,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:33,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:33,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:33,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:33,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:33,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:33,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:09:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878460018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:33,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-09 17:09:33,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376316624] [2021-07-09 17:09:33,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:33,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:33,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:33,363 INFO L87 Difference]: Start difference. First operand 4893 states and 18623 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:33,602 INFO L93 Difference]: Finished difference Result 5208 states and 19682 transitions. [2021-07-09 17:09:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:33,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 27 [2021-07-09 17:09:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:33,616 INFO L225 Difference]: With dead ends: 5208 [2021-07-09 17:09:33,617 INFO L226 Difference]: Without dead ends: 5208 [2021-07-09 17:09:33,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:33,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-07-09 17:09:33,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4755. [2021-07-09 17:09:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4755 states, 4754 states have (on average 3.8029028186790073) internal successors, (18079), 4754 states have internal predecessors, (18079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4755 states to 4755 states and 18079 transitions. [2021-07-09 17:09:33,717 INFO L78 Accepts]: Start accepts. Automaton has 4755 states and 18079 transitions. Word has length 27 [2021-07-09 17:09:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:33,717 INFO L482 AbstractCegarLoop]: Abstraction has 4755 states and 18079 transitions. [2021-07-09 17:09:33,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4755 states and 18079 transitions. [2021-07-09 17:09:33,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:09:33,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:33,728 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:33,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:09:33,942 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:33,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash 733903001, now seen corresponding path program 4 times [2021-07-09 17:09:33,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:33,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658714343] [2021-07-09 17:09:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:34,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:34,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658714343] [2021-07-09 17:09:34,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658714343] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:34,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:34,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:09:34,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911373670] [2021-07-09 17:09:34,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:34,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:34,051 INFO L87 Difference]: Start difference. First operand 4755 states and 18079 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:34,139 INFO L93 Difference]: Finished difference Result 4613 states and 17475 transitions. [2021-07-09 17:09:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 17:09:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:34,151 INFO L225 Difference]: With dead ends: 4613 [2021-07-09 17:09:34,151 INFO L226 Difference]: Without dead ends: 4453 [2021-07-09 17:09:34,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2021-07-09 17:09:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4453. [2021-07-09 17:09:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 3.8313117699910153) internal successors, (17057), 4452 states have internal predecessors, (17057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 17057 transitions. [2021-07-09 17:09:34,230 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 17057 transitions. Word has length 27 [2021-07-09 17:09:34,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:34,230 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 17057 transitions. [2021-07-09 17:09:34,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 17057 transitions. [2021-07-09 17:09:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:34,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:34,239 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:34,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-07-09 17:09:34,239 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash -393228176, now seen corresponding path program 9 times [2021-07-09 17:09:34,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:34,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768454815] [2021-07-09 17:09:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:34,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:34,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768454815] [2021-07-09 17:09:34,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768454815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738269469] [2021-07-09 17:09:34,297 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:34,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:34,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738269469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:34,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:09:34,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113908585] [2021-07-09 17:09:34,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:34,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:34,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:34,487 INFO L87 Difference]: Start difference. First operand 4453 states and 17057 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-09 17:09:35,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:35,647 INFO L93 Difference]: Finished difference Result 18250 states and 67488 transitions. [2021-07-09 17:09:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:09:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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 30 [2021-07-09 17:09:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:35,703 INFO L225 Difference]: With dead ends: 18250 [2021-07-09 17:09:35,703 INFO L226 Difference]: Without dead ends: 17714 [2021-07-09 17:09:35,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 549.7ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:09:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2021-07-09 17:09:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 11055. [2021-07-09 17:09:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 4.028586936855437) internal successors, (44532), 11054 states have internal predecessors, (44532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 44532 transitions. [2021-07-09 17:09:36,135 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 44532 transitions. Word has length 30 [2021-07-09 17:09:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:36,135 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 44532 transitions. [2021-07-09 17:09:36,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2021-07-09 17:09:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 44532 transitions. [2021-07-09 17:09:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:36,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:36,160 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:36,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:36,360 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:36,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1496580308, now seen corresponding path program 10 times [2021-07-09 17:09:36,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:36,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452731212] [2021-07-09 17:09:36,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:36,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452731212] [2021-07-09 17:09:36,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452731212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321126602] [2021-07-09 17:09:36,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:36,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:36,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:09:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:36,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:36,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:36,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:36,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:36,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:09:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321126602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:36,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:36,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:09:36,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554293695] [2021-07-09 17:09:36,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:36,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:36,613 INFO L87 Difference]: Start difference. First operand 11055 states and 44532 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:09:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:38,508 INFO L93 Difference]: Finished difference Result 23408 states and 90037 transitions. [2021-07-09 17:09:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:09:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-07-09 17:09:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:38,582 INFO L225 Difference]: With dead ends: 23408 [2021-07-09 17:09:38,582 INFO L226 Difference]: Without dead ends: 22853 [2021-07-09 17:09:38,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:09:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22853 states. [2021-07-09 17:09:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22853 to 15842. [2021-07-09 17:09:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 4.061738526608169) internal successors, (64342), 15841 states have internal predecessors, (64342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 64342 transitions. [2021-07-09 17:09:39,203 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 64342 transitions. Word has length 30 [2021-07-09 17:09:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:39,204 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 64342 transitions. [2021-07-09 17:09:39,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:09:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 64342 transitions. [2021-07-09 17:09:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:39,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:39,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:39,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:09:39,445 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1834270364, now seen corresponding path program 11 times [2021-07-09 17:09:39,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:39,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877712667] [2021-07-09 17:09:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:39,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877712667] [2021-07-09 17:09:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877712667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688663364] [2021-07-09 17:09:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:39,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:39,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:39,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:39,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:39,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688663364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:39,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-07-09 17:09:39,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88056012] [2021-07-09 17:09:39,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:09:39,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:39,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:09:39,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:39,774 INFO L87 Difference]: Start difference. First operand 15842 states and 64342 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:40,200 INFO L93 Difference]: Finished difference Result 23804 states and 95370 transitions. [2021-07-09 17:09:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:40,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 [2021-07-09 17:09:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:40,295 INFO L225 Difference]: With dead ends: 23804 [2021-07-09 17:09:40,295 INFO L226 Difference]: Without dead ends: 23752 [2021-07-09 17:09:40,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23752 states. [2021-07-09 17:09:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23752 to 16213. [2021-07-09 17:09:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16213 states, 16212 states have (on average 4.060880829015544) internal successors, (65835), 16212 states have internal predecessors, (65835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16213 states to 16213 states and 65835 transitions. [2021-07-09 17:09:40,902 INFO L78 Accepts]: Start accepts. Automaton has 16213 states and 65835 transitions. Word has length 30 [2021-07-09 17:09:40,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:40,902 INFO L482 AbstractCegarLoop]: Abstraction has 16213 states and 65835 transitions. [2021-07-09 17:09:40,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 16213 states and 65835 transitions. [2021-07-09 17:09:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:40,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:40,943 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:41,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 17:09:41,143 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:41,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1212389954, now seen corresponding path program 12 times [2021-07-09 17:09:41,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:41,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286860004] [2021-07-09 17:09:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:41,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:41,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286860004] [2021-07-09 17:09:41,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286860004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875124652] [2021-07-09 17:09:41,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:41,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:09:41,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:41,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:41,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:41,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875124652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:41,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 17:09:41,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219324793] [2021-07-09 17:09:41,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:41,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:41,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:41,368 INFO L87 Difference]: Start difference. First operand 16213 states and 65835 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2021-07-09 17:09:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:42,150 INFO L93 Difference]: Finished difference Result 31221 states and 123338 transitions. [2021-07-09 17:09:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:09:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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 30 [2021-07-09 17:09:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:42,298 INFO L225 Difference]: With dead ends: 31221 [2021-07-09 17:09:42,298 INFO L226 Difference]: Without dead ends: 30782 [2021-07-09 17:09:42,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:09:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30782 states. [2021-07-09 17:09:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30782 to 23744. [2021-07-09 17:09:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23744 states, 23743 states have (on average 4.117634671271532) internal successors, (97765), 23743 states have internal predecessors, (97765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23744 states to 23744 states and 97765 transitions. [2021-07-09 17:09:43,164 INFO L78 Accepts]: Start accepts. Automaton has 23744 states and 97765 transitions. Word has length 30 [2021-07-09 17:09:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:43,164 INFO L482 AbstractCegarLoop]: Abstraction has 23744 states and 97765 transitions. [2021-07-09 17:09:43,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 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) [2021-07-09 17:09:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 23744 states and 97765 transitions. [2021-07-09 17:09:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:43,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:43,381 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:43,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:43,601 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -977561994, now seen corresponding path program 13 times [2021-07-09 17:09:43,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:43,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728100337] [2021-07-09 17:09:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:43,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:43,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728100337] [2021-07-09 17:09:43,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728100337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133958470] [2021-07-09 17:09:43,661 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:43,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:09:43,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:43,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:43,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:43,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:43,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:43,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:09:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:43,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133958470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:43,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:09:43,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409721723] [2021-07-09 17:09:43,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:09:43,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:43,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:09:43,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:43,859 INFO L87 Difference]: Start difference. First operand 23744 states and 97765 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:09:44,051 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-07-09 17:09:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:45,216 INFO L93 Difference]: Finished difference Result 35138 states and 142210 transitions. [2021-07-09 17:09:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:09:45,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-07-09 17:09:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:45,458 INFO L225 Difference]: With dead ends: 35138 [2021-07-09 17:09:45,458 INFO L226 Difference]: Without dead ends: 34623 [2021-07-09 17:09:45,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:09:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34623 states. [2021-07-09 17:09:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34623 to 25637. [2021-07-09 17:09:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 4.109065376813856) internal successors, (105340), 25636 states have internal predecessors, (105340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 105340 transitions. [2021-07-09 17:09:46,292 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 105340 transitions. Word has length 30 [2021-07-09 17:09:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:46,293 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 105340 transitions. [2021-07-09 17:09:46,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:09:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 105340 transitions. [2021-07-09 17:09:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:46,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:46,342 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:46,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:09:46,543 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash 986277488, now seen corresponding path program 14 times [2021-07-09 17:09:46,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:46,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235875259] [2021-07-09 17:09:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:46,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235875259] [2021-07-09 17:09:46,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235875259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710594142] [2021-07-09 17:09:46,794 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:46,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:46,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:09:46,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:46,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710594142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:46,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:46,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:09:46,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901463685] [2021-07-09 17:09:46,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:46,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:46,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:46,959 INFO L87 Difference]: Start difference. First operand 25637 states and 105340 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-07-09 17:09:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:47,846 INFO L93 Difference]: Finished difference Result 51004 states and 204742 transitions. [2021-07-09 17:09:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:09:47,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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 [2021-07-09 17:09:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:48,081 INFO L225 Difference]: With dead ends: 51004 [2021-07-09 17:09:48,082 INFO L226 Difference]: Without dead ends: 50772 [2021-07-09 17:09:48,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:09:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50772 states. [2021-07-09 17:09:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50772 to 38308. [2021-07-09 17:09:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38307 states have (on average 4.208395332445767) internal successors, (161211), 38307 states have internal predecessors, (161211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 161211 transitions. [2021-07-09 17:09:49,919 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 161211 transitions. Word has length 30 [2021-07-09 17:09:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:49,919 INFO L482 AbstractCegarLoop]: Abstraction has 38308 states and 161211 transitions. [2021-07-09 17:09:49,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-07-09 17:09:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 161211 transitions. [2021-07-09 17:09:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:49,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:49,998 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:50,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:50,199 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:50,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1014935730, now seen corresponding path program 15 times [2021-07-09 17:09:50,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:50,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292938430] [2021-07-09 17:09:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:50,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292938430] [2021-07-09 17:09:50,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292938430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006762559] [2021-07-09 17:09:50,242 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:50,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:50,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:50,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:09:50,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006762559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:50,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-09 17:09:50,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030496844] [2021-07-09 17:09:50,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:09:50,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:50,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:09:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:50,394 INFO L87 Difference]: Start difference. First operand 38308 states and 161211 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-07-09 17:09:50,918 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-07-09 17:09:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:51,266 INFO L93 Difference]: Finished difference Result 45696 states and 184859 transitions. [2021-07-09 17:09:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 [2021-07-09 17:09:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:51,591 INFO L225 Difference]: With dead ends: 45696 [2021-07-09 17:09:51,591 INFO L226 Difference]: Without dead ends: 45550 [2021-07-09 17:09:51,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:09:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45550 states. [2021-07-09 17:09:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45550 to 38454. [2021-07-09 17:09:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38454 states, 38453 states have (on average 4.205341585832055) internal successors, (161708), 38453 states have internal predecessors, (161708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38454 states to 38454 states and 161708 transitions. [2021-07-09 17:09:53,231 INFO L78 Accepts]: Start accepts. Automaton has 38454 states and 161708 transitions. Word has length 30 [2021-07-09 17:09:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:53,233 INFO L482 AbstractCegarLoop]: Abstraction has 38454 states and 161708 transitions. [2021-07-09 17:09:53,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-07-09 17:09:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38454 states and 161708 transitions. [2021-07-09 17:09:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:53,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:53,331 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:53,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 17:09:53,537 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1343876520, now seen corresponding path program 16 times [2021-07-09 17:09:53,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:53,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449467897] [2021-07-09 17:09:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:53,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:53,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449467897] [2021-07-09 17:09:53,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449467897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851203248] [2021-07-09 17:09:53,590 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:53,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:53,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:53,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:09:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:53,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:09:53,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:53,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:09:53,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:53,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:09:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851203248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:53,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-09 17:09:53,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153687925] [2021-07-09 17:09:53,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:53,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:53,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:53,773 INFO L87 Difference]: Start difference. First operand 38454 states and 161708 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:09:54,612 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-09 17:09:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:55,852 INFO L93 Difference]: Finished difference Result 55267 states and 223349 transitions. [2021-07-09 17:09:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:09:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-07-09 17:09:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:56,084 INFO L225 Difference]: With dead ends: 55267 [2021-07-09 17:09:56,084 INFO L226 Difference]: Without dead ends: 54596 [2021-07-09 17:09:56,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 862.4ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:09:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54596 states. [2021-07-09 17:09:57,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54596 to 41454. [2021-07-09 17:09:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41454 states, 41453 states have (on average 4.203965937326611) internal successors, (174267), 41453 states have internal predecessors, (174267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41454 states to 41454 states and 174267 transitions. [2021-07-09 17:09:57,899 INFO L78 Accepts]: Start accepts. Automaton has 41454 states and 174267 transitions. Word has length 30 [2021-07-09 17:09:57,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:57,899 INFO L482 AbstractCegarLoop]: Abstraction has 41454 states and 174267 transitions. [2021-07-09 17:09:57,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:09:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 41454 states and 174267 transitions. [2021-07-09 17:09:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:09:57,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:57,974 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:58,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 17:09:58,175 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:58,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1685032968, now seen corresponding path program 1 times [2021-07-09 17:09:58,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:58,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656093635] [2021-07-09 17:09:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:58,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:58,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656093635] [2021-07-09 17:09:58,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656093635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916751355] [2021-07-09 17:09:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:58,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:09:58,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:58,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916751355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:58,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-09 17:09:58,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120183849] [2021-07-09 17:09:58,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:58,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:58,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:58,429 INFO L87 Difference]: Start difference. First operand 41454 states and 174267 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:09:58,752 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-07-09 17:10:00,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:00,721 INFO L93 Difference]: Finished difference Result 56968 states and 227845 transitions. [2021-07-09 17:10:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 17:10:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-07-09 17:10:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:01,143 INFO L225 Difference]: With dead ends: 56968 [2021-07-09 17:10:01,143 INFO L226 Difference]: Without dead ends: 56506 [2021-07-09 17:10:01,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1067.5ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:10:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56506 states. [2021-07-09 17:10:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56506 to 42332. [2021-07-09 17:10:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42332 states, 42331 states have (on average 4.198270770829888) internal successors, (177717), 42331 states have internal predecessors, (177717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42332 states to 42332 states and 177717 transitions. [2021-07-09 17:10:02,941 INFO L78 Accepts]: Start accepts. Automaton has 42332 states and 177717 transitions. Word has length 30 [2021-07-09 17:10:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:02,941 INFO L482 AbstractCegarLoop]: Abstraction has 42332 states and 177717 transitions. [2021-07-09 17:10:02,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:10:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 42332 states and 177717 transitions. [2021-07-09 17:10:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:03,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:03,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:03,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 17:10:03,589 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1292896282, now seen corresponding path program 17 times [2021-07-09 17:10:03,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:03,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559971099] [2021-07-09 17:10:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:03,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:03,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559971099] [2021-07-09 17:10:03,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559971099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118002006] [2021-07-09 17:10:03,633 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:03,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:10:03,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:10:03,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:03,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118002006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:03,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-07-09 17:10:03,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863676361] [2021-07-09 17:10:03,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:03,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:03,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:03,748 INFO L87 Difference]: Start difference. First operand 42332 states and 177717 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,695 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-09 17:10:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:04,839 INFO L93 Difference]: Finished difference Result 52680 states and 212917 transitions. [2021-07-09 17:10:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:04,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:10:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:05,109 INFO L225 Difference]: With dead ends: 52680 [2021-07-09 17:10:05,110 INFO L226 Difference]: Without dead ends: 52640 [2021-07-09 17:10:05,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52640 states. [2021-07-09 17:10:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52640 to 42878. [2021-07-09 17:10:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.208503393427712) internal successors, (180448), 42877 states have internal predecessors, (180448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 180448 transitions. [2021-07-09 17:10:06,858 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 180448 transitions. Word has length 30 [2021-07-09 17:10:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:06,858 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 180448 transitions. [2021-07-09 17:10:06,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 180448 transitions. [2021-07-09 17:10:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:07,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:07,231 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:07,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-09 17:10:07,456 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:07,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash -655817088, now seen corresponding path program 18 times [2021-07-09 17:10:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:07,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421846806] [2021-07-09 17:10:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:07,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:07,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421846806] [2021-07-09 17:10:07,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421846806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508085675] [2021-07-09 17:10:07,501 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:07,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:10:07,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:10:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:07,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508085675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:07,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-09 17:10:07,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202656491] [2021-07-09 17:10:07,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:07,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:07,660 INFO L87 Difference]: Start difference. First operand 42878 states and 180448 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-07-09 17:10:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:09,132 INFO L93 Difference]: Finished difference Result 93945 states and 386209 transitions. [2021-07-09 17:10:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:10:09,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 30 [2021-07-09 17:10:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:09,960 INFO L225 Difference]: With dead ends: 93945 [2021-07-09 17:10:09,960 INFO L226 Difference]: Without dead ends: 92826 [2021-07-09 17:10:09,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:10:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92826 states. [2021-07-09 17:10:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92826 to 70922. [2021-07-09 17:10:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70922 states, 70921 states have (on average 4.303647720703318) internal successors, (305219), 70921 states have internal predecessors, (305219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70922 states to 70922 states and 305219 transitions. [2021-07-09 17:10:13,561 INFO L78 Accepts]: Start accepts. Automaton has 70922 states and 305219 transitions. Word has length 30 [2021-07-09 17:10:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:13,562 INFO L482 AbstractCegarLoop]: Abstraction has 70922 states and 305219 transitions. [2021-07-09 17:10:13,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-07-09 17:10:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 70922 states and 305219 transitions. [2021-07-09 17:10:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:14,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:14,102 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:14,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:14,303 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash 882971354, now seen corresponding path program 19 times [2021-07-09 17:10:14,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:14,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517036302] [2021-07-09 17:10:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:14,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:14,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517036302] [2021-07-09 17:10:14,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517036302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728227941] [2021-07-09 17:10:14,365 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:10:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:14,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:10:14,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:10:14,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:10:14,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:10:14,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:10:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:14,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728227941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:14,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:10:14,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309210326] [2021-07-09 17:10:14,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:10:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:10:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:14,590 INFO L87 Difference]: Start difference. First operand 70922 states and 305219 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:10:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:17,170 INFO L93 Difference]: Finished difference Result 91994 states and 383695 transitions. [2021-07-09 17:10:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:10:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-07-09 17:10:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:17,672 INFO L225 Difference]: With dead ends: 91994 [2021-07-09 17:10:17,672 INFO L226 Difference]: Without dead ends: 91128 [2021-07-09 17:10:17,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 868.6ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:10:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91128 states. [2021-07-09 17:10:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91128 to 75370. [2021-07-09 17:10:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75370 states, 75369 states have (on average 4.307619843702318) internal successors, (324661), 75369 states have internal predecessors, (324661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75370 states to 75370 states and 324661 transitions. [2021-07-09 17:10:21,891 INFO L78 Accepts]: Start accepts. Automaton has 75370 states and 324661 transitions. Word has length 30 [2021-07-09 17:10:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:21,891 INFO L482 AbstractCegarLoop]: Abstraction has 75370 states and 324661 transitions. [2021-07-09 17:10:21,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:10:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 75370 states and 324661 transitions. [2021-07-09 17:10:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:22,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:22,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:22,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 17:10:22,244 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1475840896, now seen corresponding path program 20 times [2021-07-09 17:10:22,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:22,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317445986] [2021-07-09 17:10:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:22,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317445986] [2021-07-09 17:10:22,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317445986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800830223] [2021-07-09 17:10:22,301 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:22,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:22,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:22,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:10:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800830223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:22,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:10:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853691220] [2021-07-09 17:10:22,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:22,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:22,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:22,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:22,461 INFO L87 Difference]: Start difference. First operand 75370 states and 324661 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:24,121 INFO L93 Difference]: Finished difference Result 98132 states and 416693 transitions. [2021-07-09 17:10:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:10:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:24,725 INFO L225 Difference]: With dead ends: 98132 [2021-07-09 17:10:24,725 INFO L226 Difference]: Without dead ends: 98068 [2021-07-09 17:10:24,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:24,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98068 states. [2021-07-09 17:10:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98068 to 90511. [2021-07-09 17:10:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90511 states, 90510 states have (on average 4.326869959120539) internal successors, (391625), 90510 states have internal predecessors, (391625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90511 states to 90511 states and 391625 transitions. [2021-07-09 17:10:29,011 INFO L78 Accepts]: Start accepts. Automaton has 90511 states and 391625 transitions. Word has length 30 [2021-07-09 17:10:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:29,011 INFO L482 AbstractCegarLoop]: Abstraction has 90511 states and 391625 transitions. [2021-07-09 17:10:29,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 90511 states and 391625 transitions. [2021-07-09 17:10:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:29,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:29,180 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:29,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:29,385 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1672971934, now seen corresponding path program 2 times [2021-07-09 17:10:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:29,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708930062] [2021-07-09 17:10:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:29,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:29,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708930062] [2021-07-09 17:10:29,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708930062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258457416] [2021-07-09 17:10:29,458 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 [2021-07-09 17:10:29,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:29,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:10:29,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258457416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:29,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:10:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284979785] [2021-07-09 17:10:29,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:29,611 INFO L87 Difference]: Start difference. First operand 90511 states and 391625 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-07-09 17:10:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:31,445 INFO L93 Difference]: Finished difference Result 98511 states and 417660 transitions. [2021-07-09 17:10:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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 [2021-07-09 17:10:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:32,556 INFO L225 Difference]: With dead ends: 98511 [2021-07-09 17:10:32,556 INFO L226 Difference]: Without dead ends: 98337 [2021-07-09 17:10:32,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98337 states. [2021-07-09 17:10:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98337 to 90305. [2021-07-09 17:10:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90305 states, 90304 states have (on average 4.329077338766832) internal successors, (390933), 90304 states have internal predecessors, (390933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90305 states to 90305 states and 390933 transitions. [2021-07-09 17:10:36,397 INFO L78 Accepts]: Start accepts. Automaton has 90305 states and 390933 transitions. Word has length 30 [2021-07-09 17:10:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:36,397 INFO L482 AbstractCegarLoop]: Abstraction has 90305 states and 390933 transitions. [2021-07-09 17:10:36,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-07-09 17:10:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 90305 states and 390933 transitions. [2021-07-09 17:10:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:37,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:37,015 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:37,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:10:37,215 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash -776979552, now seen corresponding path program 3 times [2021-07-09 17:10:37,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:37,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704998346] [2021-07-09 17:10:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:37,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:37,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704998346] [2021-07-09 17:10:37,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704998346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594514765] [2021-07-09 17:10:37,264 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 [2021-07-09 17:10:37,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:37,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:37,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:10:37,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:37,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594514765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:37,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-07-09 17:10:37,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165453647] [2021-07-09 17:10:37,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:37,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:37,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:37,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:37,397 INFO L87 Difference]: Start difference. First operand 90305 states and 390933 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:38,937 INFO L93 Difference]: Finished difference Result 102107 states and 432585 transitions. [2021-07-09 17:10:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:10:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:39,927 INFO L225 Difference]: With dead ends: 102107 [2021-07-09 17:10:39,927 INFO L226 Difference]: Without dead ends: 101965 [2021-07-09 17:10:39,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101965 states. [2021-07-09 17:10:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101965 to 90694. [2021-07-09 17:10:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90694 states, 90693 states have (on average 4.332815101496257) internal successors, (392956), 90693 states have internal predecessors, (392956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90694 states to 90694 states and 392956 transitions. [2021-07-09 17:10:44,378 INFO L78 Accepts]: Start accepts. Automaton has 90694 states and 392956 transitions. Word has length 30 [2021-07-09 17:10:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:44,379 INFO L482 AbstractCegarLoop]: Abstraction has 90694 states and 392956 transitions. [2021-07-09 17:10:44,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 90694 states and 392956 transitions. [2021-07-09 17:10:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:44,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:44,560 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:44,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 17:10:44,761 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1079688236, now seen corresponding path program 21 times [2021-07-09 17:10:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:44,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037689826] [2021-07-09 17:10:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:44,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:44,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037689826] [2021-07-09 17:10:44,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037689826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925930676] [2021-07-09 17:10:44,821 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:44,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:10:44,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:10:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:44,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925930676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:44,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:10:44,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111305896] [2021-07-09 17:10:44,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:10:44,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:44,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:10:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:44,965 INFO L87 Difference]: Start difference. First operand 90694 states and 392956 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:47,277 INFO L93 Difference]: Finished difference Result 122868 states and 520265 transitions. [2021-07-09 17:10:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:10:47,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 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 30 [2021-07-09 17:10:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:47,983 INFO L225 Difference]: With dead ends: 122868 [2021-07-09 17:10:47,983 INFO L226 Difference]: Without dead ends: 120504 [2021-07-09 17:10:47,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:10:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120504 states. [2021-07-09 17:10:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120504 to 55126. [2021-07-09 17:10:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55126 states, 55125 states have (on average 4.2524444444444445) internal successors, (234416), 55125 states have internal predecessors, (234416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55126 states to 55126 states and 234416 transitions. [2021-07-09 17:10:51,288 INFO L78 Accepts]: Start accepts. Automaton has 55126 states and 234416 transitions. Word has length 30 [2021-07-09 17:10:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:51,288 INFO L482 AbstractCegarLoop]: Abstraction has 55126 states and 234416 transitions. [2021-07-09 17:10:51,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 55126 states and 234416 transitions. [2021-07-09 17:10:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:51,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:51,399 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:51,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 17:10:51,600 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2002103166, now seen corresponding path program 22 times [2021-07-09 17:10:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:51,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320192860] [2021-07-09 17:10:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:51,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:51,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320192860] [2021-07-09 17:10:51,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320192860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153531826] [2021-07-09 17:10:51,662 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:51,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:51,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:51,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:10:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:51,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:10:51,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:10:51,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:10:51,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:10:51,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:10:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:51,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153531826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:51,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-09 17:10:51,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557775422] [2021-07-09 17:10:51,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:10:51,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:51,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:10:51,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:51,857 INFO L87 Difference]: Start difference. First operand 55126 states and 234416 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:10:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:54,267 INFO L93 Difference]: Finished difference Result 84592 states and 350525 transitions. [2021-07-09 17:10:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:10:54,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-07-09 17:10:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:54,862 INFO L225 Difference]: With dead ends: 84592 [2021-07-09 17:10:54,863 INFO L226 Difference]: Without dead ends: 83864 [2021-07-09 17:10:54,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 791.2ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 17:10:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83864 states. [2021-07-09 17:10:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83864 to 68499. [2021-07-09 17:10:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68499 states, 68498 states have (on average 4.276489824520424) internal successors, (292931), 68498 states have internal predecessors, (292931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68499 states to 68499 states and 292931 transitions. [2021-07-09 17:10:57,353 INFO L78 Accepts]: Start accepts. Automaton has 68499 states and 292931 transitions. Word has length 30 [2021-07-09 17:10:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:57,353 INFO L482 AbstractCegarLoop]: Abstraction has 68499 states and 292931 transitions. [2021-07-09 17:10:57,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:10:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 68499 states and 292931 transitions. [2021-07-09 17:10:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:10:57,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:57,506 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:57,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,706 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash 543968604, now seen corresponding path program 4 times [2021-07-09 17:10:57,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:57,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045523557] [2021-07-09 17:10:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:57,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:57,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045523557] [2021-07-09 17:10:57,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045523557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385501959] [2021-07-09 17:10:57,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:57,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:10:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:57,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385501959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:57,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-09 17:10:57,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651465637] [2021-07-09 17:10:57,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:10:57,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:57,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:10:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:57,926 INFO L87 Difference]: Start difference. First operand 68499 states and 292931 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:11:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:00,418 INFO L93 Difference]: Finished difference Result 89398 states and 368677 transitions. [2021-07-09 17:11:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:11:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-07-09 17:11:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:01,078 INFO L225 Difference]: With dead ends: 89398 [2021-07-09 17:11:01,079 INFO L226 Difference]: Without dead ends: 88772 [2021-07-09 17:11:01,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 766.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:11:01,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88772 states. [2021-07-09 17:11:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88772 to 70166. [2021-07-09 17:11:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70166 states, 70165 states have (on average 4.271944701774389) internal successors, (299741), 70165 states have internal predecessors, (299741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70166 states to 70166 states and 299741 transitions. [2021-07-09 17:11:03,654 INFO L78 Accepts]: Start accepts. Automaton has 70166 states and 299741 transitions. Word has length 30 [2021-07-09 17:11:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:03,654 INFO L482 AbstractCegarLoop]: Abstraction has 70166 states and 299741 transitions. [2021-07-09 17:11:03,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:11:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 70166 states and 299741 transitions. [2021-07-09 17:11:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:11:03,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:03,806 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:04,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:04,007 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:04,007 INFO L82 PathProgramCache]: Analyzing trace with hash -967659738, now seen corresponding path program 23 times [2021-07-09 17:11:04,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:04,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935474040] [2021-07-09 17:11:04,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:04,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:04,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935474040] [2021-07-09 17:11:04,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935474040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158320636] [2021-07-09 17:11:04,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:04,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:11:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:11:04,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:04,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158320636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:04,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-07-09 17:11:04,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989519658] [2021-07-09 17:11:04,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:04,181 INFO L87 Difference]: Start difference. First operand 70166 states and 299741 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-07-09 17:11:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:06,056 INFO L93 Difference]: Finished difference Result 107773 states and 448693 transitions. [2021-07-09 17:11:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:11:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 [2021-07-09 17:11:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:06,641 INFO L225 Difference]: With dead ends: 107773 [2021-07-09 17:11:06,642 INFO L226 Difference]: Without dead ends: 107773 [2021-07-09 17:11:06,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:11:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107773 states. [2021-07-09 17:11:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107773 to 85136. [2021-07-09 17:11:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85136 states, 85135 states have (on average 4.30706524930992) internal successors, (366682), 85135 states have internal predecessors, (366682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85136 states to 85136 states and 366682 transitions. [2021-07-09 17:11:10,618 INFO L78 Accepts]: Start accepts. Automaton has 85136 states and 366682 transitions. Word has length 30 [2021-07-09 17:11:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:10,618 INFO L482 AbstractCegarLoop]: Abstraction has 85136 states and 366682 transitions. [2021-07-09 17:11:10,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-07-09 17:11:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 85136 states and 366682 transitions. [2021-07-09 17:11:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:11:11,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:11,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:11,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 17:11:11,398 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1634397388, now seen corresponding path program 24 times [2021-07-09 17:11:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:11,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129566977] [2021-07-09 17:11:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:11,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:11,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129566977] [2021-07-09 17:11:11,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129566977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:11,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578655092] [2021-07-09 17:11:11,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:11,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:11:11,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:11:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:11,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578655092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:11,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:11,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-09 17:11:11,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805022866] [2021-07-09 17:11:11,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:11,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:11,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:11,686 INFO L87 Difference]: Start difference. First operand 85136 states and 366682 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-07-09 17:11:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:14,292 INFO L93 Difference]: Finished difference Result 136874 states and 574741 transitions. [2021-07-09 17:11:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:11:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 30 [2021-07-09 17:11:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:15,108 INFO L225 Difference]: With dead ends: 136874 [2021-07-09 17:11:15,108 INFO L226 Difference]: Without dead ends: 135508 [2021-07-09 17:11:15,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:11:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135508 states. [2021-07-09 17:11:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135508 to 93986. [2021-07-09 17:11:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93986 states, 93985 states have (on average 4.333212746714901) internal successors, (407257), 93985 states have internal predecessors, (407257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93986 states to 93986 states and 407257 transitions. [2021-07-09 17:11:19,353 INFO L78 Accepts]: Start accepts. Automaton has 93986 states and 407257 transitions. Word has length 30 [2021-07-09 17:11:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:19,353 INFO L482 AbstractCegarLoop]: Abstraction has 93986 states and 407257 transitions. [2021-07-09 17:11:19,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-07-09 17:11:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 93986 states and 407257 transitions. [2021-07-09 17:11:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:11:19,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:19,986 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:20,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 17:11:20,212 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1685858338, now seen corresponding path program 25 times [2021-07-09 17:11:20,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:20,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821345831] [2021-07-09 17:11:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:20,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:20,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821345831] [2021-07-09 17:11:20,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821345831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:20,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423942187] [2021-07-09 17:11:20,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:20,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:11:20,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:11:20,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:11:20,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:11:20,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:11:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:20,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423942187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:20,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:20,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:11:20,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562834688] [2021-07-09 17:11:20,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:11:20,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:20,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:11:20,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:20,423 INFO L87 Difference]: Start difference. First operand 93986 states and 407257 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:11:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:23,207 INFO L93 Difference]: Finished difference Result 122538 states and 522164 transitions. [2021-07-09 17:11:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:11:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-07-09 17:11:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:24,282 INFO L225 Difference]: With dead ends: 122538 [2021-07-09 17:11:24,282 INFO L226 Difference]: Without dead ends: 122036 [2021-07-09 17:11:24,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 924.0ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:11:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122036 states. [2021-07-09 17:11:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122036 to 107696. [2021-07-09 17:11:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107696 states, 107695 states have (on average 4.352569757184642) internal successors, (468750), 107695 states have internal predecessors, (468750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107696 states to 107696 states and 468750 transitions. [2021-07-09 17:11:28,842 INFO L78 Accepts]: Start accepts. Automaton has 107696 states and 468750 transitions. Word has length 30 [2021-07-09 17:11:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:28,842 INFO L482 AbstractCegarLoop]: Abstraction has 107696 states and 468750 transitions. [2021-07-09 17:11:28,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:11:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 107696 states and 468750 transitions. [2021-07-09 17:11:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:11:29,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:29,061 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:29,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:29,262 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1718530562, now seen corresponding path program 5 times [2021-07-09 17:11:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:29,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288287875] [2021-07-09 17:11:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:29,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:29,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288287875] [2021-07-09 17:11:29,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288287875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216607638] [2021-07-09 17:11:29,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:11:29,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:11:29,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:11:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:29,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216607638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:29,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:11:29,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33806476] [2021-07-09 17:11:29,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:29,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:29,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:29,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:29,442 INFO L87 Difference]: Start difference. First operand 107696 states and 468750 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:32,138 INFO L93 Difference]: Finished difference Result 152595 states and 646553 transitions. [2021-07-09 17:11:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:11:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:11:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:33,066 INFO L225 Difference]: With dead ends: 152595 [2021-07-09 17:11:33,067 INFO L226 Difference]: Without dead ends: 152595 [2021-07-09 17:11:33,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:11:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152595 states. [2021-07-09 17:11:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152595 to 126512. [2021-07-09 17:11:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126512 states, 126511 states have (on average 4.371912323829548) internal successors, (553095), 126511 states have internal predecessors, (553095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126512 states to 126512 states and 553095 transitions. [2021-07-09 17:11:38,709 INFO L78 Accepts]: Start accepts. Automaton has 126512 states and 553095 transitions. Word has length 30 [2021-07-09 17:11:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:38,709 INFO L482 AbstractCegarLoop]: Abstraction has 126512 states and 553095 transitions. [2021-07-09 17:11:38,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 126512 states and 553095 transitions. [2021-07-09 17:11:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:11:39,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:39,399 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:39,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 17:11:39,613 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1840643646, now seen corresponding path program 26 times [2021-07-09 17:11:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604272034] [2021-07-09 17:11:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:39,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:39,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604272034] [2021-07-09 17:11:39,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604272034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:39,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253817830] [2021-07-09 17:11:39,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:39,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:39,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:39,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:11:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:39,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253817830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:39,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:39,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:11:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615195137] [2021-07-09 17:11:39,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:11:39,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:39,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:11:39,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:39,836 INFO L87 Difference]: Start difference. First operand 126512 states and 553095 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-07-09 17:11:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:41,942 INFO L93 Difference]: Finished difference Result 141394 states and 612178 transitions. [2021-07-09 17:11:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:11:41,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:11:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:42,815 INFO L225 Difference]: With dead ends: 141394 [2021-07-09 17:11:42,815 INFO L226 Difference]: Without dead ends: 141322 [2021-07-09 17:11:42,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:11:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141322 states. [2021-07-09 17:11:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141322 to 126703. [2021-07-09 17:11:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126703 states, 126702 states have (on average 4.370017837129643) internal successors, (553690), 126702 states have internal predecessors, (553690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126703 states to 126703 states and 553690 transitions. [2021-07-09 17:11:48,863 INFO L78 Accepts]: Start accepts. Automaton has 126703 states and 553690 transitions. Word has length 30 [2021-07-09 17:11:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:48,863 INFO L482 AbstractCegarLoop]: Abstraction has 126703 states and 553690 transitions. [2021-07-09 17:11:48,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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) [2021-07-09 17:11:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 126703 states and 553690 transitions. [2021-07-09 17:11:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:11:49,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:49,239 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:49,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:49,439 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1447640776, now seen corresponding path program 27 times [2021-07-09 17:11:49,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:49,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755172710] [2021-07-09 17:11:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:49,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755172710] [2021-07-09 17:11:49,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755172710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789058062] [2021-07-09 17:11:49,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:49,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:11:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:50,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:11:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:50,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789058062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:50,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:50,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:11:50,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772147902] [2021-07-09 17:11:50,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:11:50,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:50,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:11:50,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:50,175 INFO L87 Difference]: Start difference. First operand 126703 states and 553690 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:52,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:52,935 INFO L93 Difference]: Finished difference Result 141176 states and 611517 transitions. [2021-07-09 17:11:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:11:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:11:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:54,111 INFO L225 Difference]: With dead ends: 141176 [2021-07-09 17:11:54,111 INFO L226 Difference]: Without dead ends: 141132 [2021-07-09 17:11:54,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:11:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141132 states. [2021-07-09 17:11:58,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141132 to 126705. [2021-07-09 17:11:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126705 states, 126704 states have (on average 4.370067243338806) internal successors, (553705), 126704 states have internal predecessors, (553705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126705 states to 126705 states and 553705 transitions. [2021-07-09 17:11:59,631 INFO L78 Accepts]: Start accepts. Automaton has 126705 states and 553705 transitions. Word has length 30 [2021-07-09 17:11:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:59,631 INFO L482 AbstractCegarLoop]: Abstraction has 126705 states and 553705 transitions. [2021-07-09 17:11:59,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 126705 states and 553705 transitions. [2021-07-09 17:11:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:11:59,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:59,858 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:00,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 17:12:00,059 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:00,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1706436100, now seen corresponding path program 28 times [2021-07-09 17:12:00,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:00,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184437604] [2021-07-09 17:12:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:00,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:00,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184437604] [2021-07-09 17:12:00,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184437604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381088535] [2021-07-09 17:12:00,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:00,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:00,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:00,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:12:00,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:00,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:00,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:00,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-09 17:12:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:00,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381088535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:00,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:12:00,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477289545] [2021-07-09 17:12:00,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:12:00,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:12:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:00,309 INFO L87 Difference]: Start difference. First operand 126705 states and 553705 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:12:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:03,429 INFO L93 Difference]: Finished difference Result 149894 states and 645986 transitions. [2021-07-09 17:12:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:12:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-07-09 17:12:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:04,807 INFO L225 Difference]: With dead ends: 149894 [2021-07-09 17:12:04,807 INFO L226 Difference]: Without dead ends: 149494 [2021-07-09 17:12:04,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:12:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149494 states. [2021-07-09 17:12:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149494 to 129512. [2021-07-09 17:12:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129512 states, 129511 states have (on average 4.370130722486893) internal successors, (565980), 129511 states have internal predecessors, (565980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129512 states to 129512 states and 565980 transitions. [2021-07-09 17:12:10,319 INFO L78 Accepts]: Start accepts. Automaton has 129512 states and 565980 transitions. Word has length 30 [2021-07-09 17:12:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:10,319 INFO L482 AbstractCegarLoop]: Abstraction has 129512 states and 565980 transitions. [2021-07-09 17:12:10,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:12:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 129512 states and 565980 transitions. [2021-07-09 17:12:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:12:10,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:10,567 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:10,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:12:10,768 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash 461248004, now seen corresponding path program 29 times [2021-07-09 17:12:10,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:10,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444454332] [2021-07-09 17:12:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:10,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:10,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444454332] [2021-07-09 17:12:10,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444454332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281912405] [2021-07-09 17:12:10,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:10,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:12:10,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:10,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:12:10,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:10,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281912405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:10,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:12:10,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60947967] [2021-07-09 17:12:10,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:10,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:10,959 INFO L87 Difference]: Start difference. First operand 129512 states and 565980 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:12:11,667 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-07-09 17:12:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:15,078 INFO L93 Difference]: Finished difference Result 214461 states and 912367 transitions. [2021-07-09 17:12:15,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 17:12:15,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-07-09 17:12:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:17,693 INFO L225 Difference]: With dead ends: 214461 [2021-07-09 17:12:17,694 INFO L226 Difference]: Without dead ends: 212520 [2021-07-09 17:12:17,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1145.2ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 17:12:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212520 states. [2021-07-09 17:12:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212520 to 132616. [2021-07-09 17:12:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132616 states, 132615 states have (on average 4.362892583795197) internal successors, (578585), 132615 states have internal predecessors, (578585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132616 states to 132616 states and 578585 transitions. [2021-07-09 17:12:25,944 INFO L78 Accepts]: Start accepts. Automaton has 132616 states and 578585 transitions. Word has length 30 [2021-07-09 17:12:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:25,944 INFO L482 AbstractCegarLoop]: Abstraction has 132616 states and 578585 transitions. [2021-07-09 17:12:25,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-07-09 17:12:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 132616 states and 578585 transitions. [2021-07-09 17:12:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:12:26,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:26,661 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:26,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:26,873 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1201227792, now seen corresponding path program 30 times [2021-07-09 17:12:26,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:26,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598779713] [2021-07-09 17:12:26,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:26,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598779713] [2021-07-09 17:12:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598779713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680006669] [2021-07-09 17:12:26,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:26,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:12:26,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:12:26,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:27,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680006669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:27,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:27,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:12:27,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874463423] [2021-07-09 17:12:27,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:27,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:27,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:27,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:27,091 INFO L87 Difference]: Start difference. First operand 132616 states and 578585 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-07-09 17:12:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:31,728 INFO L93 Difference]: Finished difference Result 300250 states and 1286549 transitions. [2021-07-09 17:12:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:12:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 17:12:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:34,151 INFO L225 Difference]: With dead ends: 300250 [2021-07-09 17:12:34,151 INFO L226 Difference]: Without dead ends: 300250 [2021-07-09 17:12:34,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 538.3ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:12:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300250 states. [2021-07-09 17:12:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300250 to 212691. [2021-07-09 17:12:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212691 states, 212690 states have (on average 4.4037519394423805) internal successors, (936634), 212690 states have internal predecessors, (936634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212691 states to 212691 states and 936634 transitions. [2021-07-09 17:12:46,349 INFO L78 Accepts]: Start accepts. Automaton has 212691 states and 936634 transitions. Word has length 30 [2021-07-09 17:12:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:46,349 INFO L482 AbstractCegarLoop]: Abstraction has 212691 states and 936634 transitions. [2021-07-09 17:12:46,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-07-09 17:12:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 212691 states and 936634 transitions. [2021-07-09 17:12:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:12:47,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:47,007 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:47,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:47,221 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:47,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1407643986, now seen corresponding path program 31 times [2021-07-09 17:12:47,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:47,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66583524] [2021-07-09 17:12:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:47,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66583524] [2021-07-09 17:12:47,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66583524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923517772] [2021-07-09 17:12:47,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:47,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-07-09 17:12:47,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:47,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:12:47,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:47,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2021-07-09 17:12:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:47,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923517772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:47,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:47,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:12:47,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455140892] [2021-07-09 17:12:47,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:12:47,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:12:47,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:47,462 INFO L87 Difference]: Start difference. First operand 212691 states and 936634 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:12:48,639 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-07-09 17:12:53,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:53,310 INFO L93 Difference]: Finished difference Result 282236 states and 1220316 transitions. [2021-07-09 17:12:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:12:53,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-07-09 17:12:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:56,948 INFO L225 Difference]: With dead ends: 282236 [2021-07-09 17:12:56,948 INFO L226 Difference]: Without dead ends: 281826 [2021-07-09 17:12:56,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1149.1ms TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:12:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281826 states. [2021-07-09 17:13:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281826 to 224350. [2021-07-09 17:13:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224350 states, 224349 states have (on average 4.40408916464972) internal successors, (988053), 224349 states have internal predecessors, (988053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:09,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224350 states to 224350 states and 988053 transitions. [2021-07-09 17:13:09,424 INFO L78 Accepts]: Start accepts. Automaton has 224350 states and 988053 transitions. Word has length 30 [2021-07-09 17:13:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:09,424 INFO L482 AbstractCegarLoop]: Abstraction has 224350 states and 988053 transitions. [2021-07-09 17:13:09,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:13:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 224350 states and 988053 transitions. [2021-07-09 17:13:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:13:09,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:09,803 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:10,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:10,004 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:10,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1630750348, now seen corresponding path program 32 times [2021-07-09 17:13:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:10,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632130702] [2021-07-09 17:13:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:10,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:10,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632130702] [2021-07-09 17:13:10,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632130702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304985977] [2021-07-09 17:13:10,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:10,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:10,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:13:10,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:10,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304985977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:10,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:13:10,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861996191] [2021-07-09 17:13:10,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:10,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:10,220 INFO L87 Difference]: Start difference. First operand 224350 states and 988053 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:13:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:19,554 INFO L93 Difference]: Finished difference Result 486397 states and 2091172 transitions. [2021-07-09 17:13:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 17:13:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-07-09 17:13:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:24,450 INFO L225 Difference]: With dead ends: 486397 [2021-07-09 17:13:24,451 INFO L226 Difference]: Without dead ends: 483934 [2021-07-09 17:13:24,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1395.8ms TimeCoverageRelationStatistics Valid=1330, Invalid=5810, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 17:13:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483934 states. [2021-07-09 17:13:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483934 to 267199. [2021-07-09 17:13:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267199 states, 267198 states have (on average 4.399258227980749) internal successors, (1175473), 267198 states have internal predecessors, (1175473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267199 states to 267199 states and 1175473 transitions. [2021-07-09 17:13:49,697 INFO L78 Accepts]: Start accepts. Automaton has 267199 states and 1175473 transitions. Word has length 30 [2021-07-09 17:13:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:49,698 INFO L482 AbstractCegarLoop]: Abstraction has 267199 states and 1175473 transitions. [2021-07-09 17:13:49,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-07-09 17:13:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 267199 states and 1175473 transitions. [2021-07-09 17:13:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 17:13:50,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:50,116 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:50,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:50,316 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash -154432502, now seen corresponding path program 33 times [2021-07-09 17:13:50,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:50,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690687199] [2021-07-09 17:13:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:50,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:50,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690687199] [2021-07-09 17:13:50,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690687199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482221312] [2021-07-09 17:13:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:50,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:13:50,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:50,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:13:50,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:50,923 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 17:13:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:50,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482221312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:50,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 17:13:50,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404001769] [2021-07-09 17:13:50,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:50,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:50,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:50,998 INFO L87 Difference]: Start difference. First operand 267199 states and 1175473 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-07-09 17:13:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:58,338 INFO L93 Difference]: Finished difference Result 404661 states and 1760197 transitions. [2021-07-09 17:13:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:13:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 30 [2021-07-09 17:13:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:04,239 INFO L225 Difference]: With dead ends: 404661 [2021-07-09 17:14:04,240 INFO L226 Difference]: Without dead ends: 403634 [2021-07-09 17:14:04,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 848.1ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:14:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403634 states. [2021-07-09 17:14:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403634 to 196954. [2021-07-09 17:14:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196954 states, 196953 states have (on average 4.401897914730926) internal successors, (866967), 196953 states have internal predecessors, (866967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196954 states to 196954 states and 866967 transitions. [2021-07-09 17:14:18,261 INFO L78 Accepts]: Start accepts. Automaton has 196954 states and 866967 transitions. Word has length 30 [2021-07-09 17:14:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:18,261 INFO L482 AbstractCegarLoop]: Abstraction has 196954 states and 866967 transitions. [2021-07-09 17:14:18,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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) [2021-07-09 17:14:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 196954 states and 866967 transitions. [2021-07-09 17:14:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:14:18,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:18,648 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:18,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:18,850 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:18,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1759456308, now seen corresponding path program 34 times [2021-07-09 17:14:18,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:18,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919140539] [2021-07-09 17:14:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:18,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:18,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919140539] [2021-07-09 17:14:18,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919140539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:18,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240540728] [2021-07-09 17:14:18,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:19,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:19,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:14:19,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:19,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240540728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:19,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 17:14:19,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768113330] [2021-07-09 17:14:19,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:19,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:19,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:19,565 INFO L87 Difference]: Start difference. First operand 196954 states and 866967 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:23,292 INFO L93 Difference]: Finished difference Result 299970 states and 1308288 transitions. [2021-07-09 17:14:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 33 [2021-07-09 17:14:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:26,383 INFO L225 Difference]: With dead ends: 299970 [2021-07-09 17:14:26,383 INFO L226 Difference]: Without dead ends: 297610 [2021-07-09 17:14:26,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297610 states. [2021-07-09 17:14:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297610 to 245260. [2021-07-09 17:14:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245260 states, 245259 states have (on average 4.444477063023172) internal successors, (1090048), 245259 states have internal predecessors, (1090048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245260 states to 245260 states and 1090048 transitions. [2021-07-09 17:14:41,853 INFO L78 Accepts]: Start accepts. Automaton has 245260 states and 1090048 transitions. Word has length 33 [2021-07-09 17:14:41,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:41,853 INFO L482 AbstractCegarLoop]: Abstraction has 245260 states and 1090048 transitions. [2021-07-09 17:14:41,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,853 INFO L276 IsEmpty]: Start isEmpty. Operand 245260 states and 1090048 transitions. [2021-07-09 17:14:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:14:42,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:42,715 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:42,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 17:14:42,916 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash -843323476, now seen corresponding path program 1 times [2021-07-09 17:14:42,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:42,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845726639] [2021-07-09 17:14:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:43,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:43,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845726639] [2021-07-09 17:14:43,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845726639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:43,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855555485] [2021-07-09 17:14:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-07-09 17:14:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:14:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:43,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:14:43,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:43,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:14:43,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:43,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:14:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:43,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855555485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:43,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:43,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-07-09 17:14:43,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315161380] [2021-07-09 17:14:43,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:14:43,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:43,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:14:43,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:43,195 INFO L87 Difference]: Start difference. First operand 245260 states and 1090048 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-07-09 17:14:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:46,851 INFO L93 Difference]: Finished difference Result 248659 states and 1102596 transitions. [2021-07-09 17:14:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:14:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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 33 [2021-07-09 17:14:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:49,029 INFO L225 Difference]: With dead ends: 248659 [2021-07-09 17:14:49,030 INFO L226 Difference]: Without dead ends: 248539 [2021-07-09 17:14:49,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:14:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248539 states. [2021-07-09 17:14:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248539 to 247204. [2021-07-09 17:14:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247204 states, 247203 states have (on average 4.439096612905183) internal successors, (1097358), 247203 states have internal predecessors, (1097358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247204 states to 247204 states and 1097358 transitions. [2021-07-09 17:15:02,414 INFO L78 Accepts]: Start accepts. Automaton has 247204 states and 1097358 transitions. Word has length 33 [2021-07-09 17:15:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:02,414 INFO L482 AbstractCegarLoop]: Abstraction has 247204 states and 1097358 transitions. [2021-07-09 17:15:02,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2021-07-09 17:15:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 247204 states and 1097358 transitions. [2021-07-09 17:15:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:15:03,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:03,722 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:03,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 17:15:03,941 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:03,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1857877874, now seen corresponding path program 1 times [2021-07-09 17:15:03,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:03,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642977742] [2021-07-09 17:15:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:04,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642977742] [2021-07-09 17:15:04,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642977742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:04,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456144139] [2021-07-09 17:15:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:04,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:15:04,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:04,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456144139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:04,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:04,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:15:04,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784061152] [2021-07-09 17:15:04,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:15:04,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:04,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:15:04,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:04,292 INFO L87 Difference]: Start difference. First operand 247204 states and 1097358 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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) [2021-07-09 17:15:09,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:09,381 INFO L93 Difference]: Finished difference Result 249510 states and 1105535 transitions. [2021-07-09 17:15:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:15:09,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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 33 [2021-07-09 17:15:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:11,670 INFO L225 Difference]: With dead ends: 249510 [2021-07-09 17:15:11,670 INFO L226 Difference]: Without dead ends: 248501 [2021-07-09 17:15:11,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:15:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248501 states. [2021-07-09 17:15:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248501 to 247941. [2021-07-09 17:15:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247941 states, 247940 states have (on average 4.436609663628297) internal successors, (1100013), 247940 states have internal predecessors, (1100013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247941 states to 247941 states and 1100013 transitions. [2021-07-09 17:15:25,643 INFO L78 Accepts]: Start accepts. Automaton has 247941 states and 1100013 transitions. Word has length 33 [2021-07-09 17:15:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:25,643 INFO L482 AbstractCegarLoop]: Abstraction has 247941 states and 1100013 transitions. [2021-07-09 17:15:25,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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) [2021-07-09 17:15:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 247941 states and 1100013 transitions. [2021-07-09 17:15:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:15:26,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:26,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:27,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:27,102 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1129985132, now seen corresponding path program 2 times [2021-07-09 17:15:27,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:27,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679222672] [2021-07-09 17:15:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:27,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:27,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679222672] [2021-07-09 17:15:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679222672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:27,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057795488] [2021-07-09 17:15:27,215 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:27,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:27,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:15:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:27,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-09 17:15:27,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:15:27,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:15:27,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:15:27,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-09 17:15:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:27,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057795488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:27,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:27,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-07-09 17:15:27,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337267833] [2021-07-09 17:15:27,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:15:27,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:27,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:15:27,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:15:27,413 INFO L87 Difference]: Start difference. First operand 247941 states and 1100013 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-09 17:15:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:32,843 INFO L93 Difference]: Finished difference Result 258027 states and 1137213 transitions. [2021-07-09 17:15:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:15:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 33 [2021-07-09 17:15:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:35,169 INFO L225 Difference]: With dead ends: 258027 [2021-07-09 17:15:35,169 INFO L226 Difference]: Without dead ends: 257921 [2021-07-09 17:15:35,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:15:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257921 states. [2021-07-09 17:15:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257921 to 249856. [2021-07-09 17:15:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249856 states, 249855 states have (on average 4.432294730943948) internal successors, (1107431), 249855 states have internal predecessors, (1107431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:49,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249856 states to 249856 states and 1107431 transitions. [2021-07-09 17:15:49,969 INFO L78 Accepts]: Start accepts. Automaton has 249856 states and 1107431 transitions. Word has length 33 [2021-07-09 17:15:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:49,969 INFO L482 AbstractCegarLoop]: Abstraction has 249856 states and 1107431 transitions. [2021-07-09 17:15:49,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-09 17:15:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 249856 states and 1107431 transitions. [2021-07-09 17:15:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:15:51,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:51,359 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:51,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 17:15:51,583 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1036448618, now seen corresponding path program 2 times [2021-07-09 17:15:51,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:51,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867104901] [2021-07-09 17:15:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:51,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:51,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867104901] [2021-07-09 17:15:51,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867104901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:51,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440424652] [2021-07-09 17:15:51,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:51,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:51,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:15:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:51,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440424652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:51,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:51,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:15:51,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029221392] [2021-07-09 17:15:51,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:15:51,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:51,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:15:51,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:51,961 INFO L87 Difference]: Start difference. First operand 249856 states and 1107431 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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) [2021-07-09 17:15:52,991 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-07-09 17:15:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:56,677 INFO L93 Difference]: Finished difference Result 251203 states and 1111360 transitions. [2021-07-09 17:15:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:15:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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 33 [2021-07-09 17:15:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:58,916 INFO L225 Difference]: With dead ends: 251203 [2021-07-09 17:15:58,916 INFO L226 Difference]: Without dead ends: 250188 [2021-07-09 17:15:58,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:15:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250188 states. [2021-07-09 17:16:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250188 to 249232. [2021-07-09 17:16:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249232 states, 249231 states have (on average 4.431382933904691) internal successors, (1104438), 249231 states have internal predecessors, (1104438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249232 states to 249232 states and 1104438 transitions. [2021-07-09 17:16:12,512 INFO L78 Accepts]: Start accepts. Automaton has 249232 states and 1104438 transitions. Word has length 33 [2021-07-09 17:16:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:12,512 INFO L482 AbstractCegarLoop]: Abstraction has 249232 states and 1104438 transitions. [2021-07-09 17:16:12,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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) [2021-07-09 17:16:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 249232 states and 1104438 transitions. [2021-07-09 17:16:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:16:13,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:13,790 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:14,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:14,013 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1947467614, now seen corresponding path program 3 times [2021-07-09 17:16:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:14,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101895558] [2021-07-09 17:16:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:14,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101895558] [2021-07-09 17:16:14,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101895558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274599487] [2021-07-09 17:16:14,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:14,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:16:14,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:16:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:14,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274599487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:14,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:14,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 17:16:14,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393528102] [2021-07-09 17:16:14,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:16:14,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:16:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:14,372 INFO L87 Difference]: Start difference. First operand 249232 states and 1104438 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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) [2021-07-09 17:16:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:19,109 INFO L93 Difference]: Finished difference Result 253243 states and 1118843 transitions. [2021-07-09 17:16:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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 33 [2021-07-09 17:16:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:21,336 INFO L225 Difference]: With dead ends: 253243 [2021-07-09 17:16:21,337 INFO L226 Difference]: Without dead ends: 251565 [2021-07-09 17:16:21,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:16:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251565 states. [2021-07-09 17:16:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251565 to 250713. [2021-07-09 17:16:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250713 states, 250712 states have (on average 4.423908707999617) internal successors, (1109127), 250712 states have internal predecessors, (1109127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250713 states to 250713 states and 1109127 transitions. [2021-07-09 17:16:34,498 INFO L78 Accepts]: Start accepts. Automaton has 250713 states and 1109127 transitions. Word has length 33 [2021-07-09 17:16:34,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:34,498 INFO L482 AbstractCegarLoop]: Abstraction has 250713 states and 1109127 transitions. [2021-07-09 17:16:34,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 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) [2021-07-09 17:16:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 250713 states and 1109127 transitions. [2021-07-09 17:16:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:16:35,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:35,830 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:36,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-07-09 17:16:36,049 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:36,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:36,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1681201706, now seen corresponding path program 35 times [2021-07-09 17:16:36,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:36,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722684493] [2021-07-09 17:16:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:36,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:36,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722684493] [2021-07-09 17:16:36,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722684493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:36,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949878371] [2021-07-09 17:16:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:36,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:16:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:36,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:16:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:36,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949878371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:36,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:36,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 17:16:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081843842] [2021-07-09 17:16:36,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:36,438 INFO L87 Difference]: Start difference. First operand 250713 states and 1109127 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:16:43,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:43,021 INFO L93 Difference]: Finished difference Result 408902 states and 1783714 transitions. [2021-07-09 17:16:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:16:43,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 33 [2021-07-09 17:16:43,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:47,629 INFO L225 Difference]: With dead ends: 408902 [2021-07-09 17:16:47,629 INFO L226 Difference]: Without dead ends: 403086 [2021-07-09 17:16:47,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:16:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403086 states. [2021-07-09 17:17:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403086 to 323030. [2021-07-09 17:17:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323030 states, 323029 states have (on average 4.426342526522387) internal successors, (1429837), 323029 states have internal predecessors, (1429837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323030 states to 323030 states and 1429837 transitions. [2021-07-09 17:17:10,941 INFO L78 Accepts]: Start accepts. Automaton has 323030 states and 1429837 transitions. Word has length 33 [2021-07-09 17:17:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:10,941 INFO L482 AbstractCegarLoop]: Abstraction has 323030 states and 1429837 transitions. [2021-07-09 17:17:10,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-07-09 17:17:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 323030 states and 1429837 transitions. [2021-07-09 17:17:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:17:11,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:11,969 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:12,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:12,170 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash -913135154, now seen corresponding path program 36 times [2021-07-09 17:17:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:12,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132322950] [2021-07-09 17:17:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:17:12,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132322950] [2021-07-09 17:17:12,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132322950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631886906] [2021-07-09 17:17:12,246 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 [2021-07-09 17:17:12,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:17:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:17:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:17:12,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631886906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:12,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:12,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-07-09 17:17:12,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558663127] [2021-07-09 17:17:12,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:17:12,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:12,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:17:12,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:17:12,519 INFO L87 Difference]: Start difference. First operand 323030 states and 1429837 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 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) [2021-07-09 17:17:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:30,567 INFO L93 Difference]: Finished difference Result 564498 states and 2414011 transitions. [2021-07-09 17:17:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-07-09 17:17:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 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 33 [2021-07-09 17:17:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:36,273 INFO L225 Difference]: With dead ends: 564498 [2021-07-09 17:17:36,273 INFO L226 Difference]: Without dead ends: 555301 [2021-07-09 17:17:36,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10906 ImplicationChecksByTransitivity, 5153.5ms TimeCoverageRelationStatistics Valid=3771, Invalid=24959, Unknown=0, NotChecked=0, Total=28730 [2021-07-09 17:17:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555301 states. [2021-07-09 17:18:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555301 to 426258. [2021-07-09 17:18:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426258 states, 426257 states have (on average 4.406536432246274) internal successors, (1878317), 426257 states have internal predecessors, (1878317), 0 states have call successors, (0), 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... [2021-07-09 17:18:12,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:12,677 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 17:18:12,680 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 17:18:12,681 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 17:18:12,681 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 05:18:12 BasicIcfg [2021-07-09 17:18:12,681 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 17:18:12,682 INFO L168 Benchmark]: Toolchain (without parser) took 549986.25 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 182.0 MB in the beginning and 3.5 GB in the end (delta: -3.3 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-07-09 17:18:12,682 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 17:18:12,682 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.00 ms. Allocated memory is still 202.4 MB. Free memory was 181.9 MB in the beginning and 180.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 17:18:12,682 INFO L168 Benchmark]: Boogie Preprocessor took 34.05 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 179.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 17:18:12,682 INFO L168 Benchmark]: RCFGBuilder took 348.28 ms. Allocated memory is still 202.4 MB. Free memory was 179.3 MB in the beginning and 166.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 17:18:12,682 INFO L168 Benchmark]: TraceAbstraction took 549568.92 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 166.0 MB in the beginning and 3.5 GB in the end (delta: -3.3 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-07-09 17:18:12,683 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 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.00 ms. Allocated memory is still 202.4 MB. Free memory was 181.9 MB in the beginning and 180.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.05 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 179.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 348.28 ms. Allocated memory is still 202.4 MB. Free memory was 179.3 MB in the beginning and 166.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 549568.92 ms. Allocated memory was 202.4 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 166.0 MB in the beginning and 3.5 GB in the end (delta: -3.3 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (408453 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 549471.9ms, OverallIterations: 79, TraceHistogramMax: 2, EmptinessCheckTime: 17728.0ms, AutomataDifference: 201115.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5443 SDtfs, 21822 SDslu, 34813 SDs, 0 SdLazy, 55222 SolverSat, 1979 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25419.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3492 GetRequests, 1609 SyntacticMatches, 29 SemanticMatches, 1854 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24188 ImplicationChecksByTransitivity, 32872.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=323030occurred in iteration=78, InterpolantAutomatonStates: 1600, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 295713.9ms AutomataMinimizationTime, 79 MinimizatonAttempts, 1239824 StatesRemovedByMinimization, 77 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 775.0ms SsaConstructionTime, 1288.4ms SatisfiabilityAnalysisTime, 15402.1ms InterpolantComputationTime, 4071 NumberOfCodeBlocks, 4059 NumberOfCodeBlocksAsserted, 238 NumberOfCheckSat, 3920 ConstructedInterpolants, 0 QuantifiedInterpolants, 41003 SizeOfPredicates, 403 NumberOfNonLiveVariables, 5273 ConjunctsInSsa, 844 ConjunctsInUnsatCore, 151 InterpolantComputations, 9 PerfectInterpolantSequences, 411/1131 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 !SESSION 2021-07-09 17:09:00.747 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-07-09 17:18:12.950 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0e4a38c/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da0e4a38c/.metadata/.log.